ft8 op zee

HF Voyager

HF Voyager maakt FT8 contact mogelijk met zeldzame zee-locators

Het Jupiter Research Foundation Amateur Radio Club heeft een HF zender in een autonome zee-drone geplaatst. De drone verricht zelf wetenschappelijk onderzoek maar geeft ook zendamateurs een zeldzame kans.

Locators op zee

Wie keurig een kaart bijhoudt van welke Grid Locators hij of zij gewerkt heeft zal na jaren opmerken, dat de zee moeilijk in te kleuren valt. Aan boord van een Wave Glider SV-3 heeft de JRFARC een HF zender geplaatst waarmee op 20 meter contacten in PSK31 en FT8 gemaakt kunnen worden. In tijden van slechte condities is ook WSPR een gangbare mode. De gebruikte callsign is KH6JF/MM.

De drone vaart zelfstandig tussen Hawaii en Californië met als onderzoeksdoel het zoeken naar Bultrugwalvissen. Het team wil meer te weten komen over de route die deze bijzondere dieren afleggen.

De drone was de afgelopen dagen offline door slechte weerscondities maar is inmiddels weer te vinden op de 20 meter band in de FT8 mode. De club is van plan om zendamateurs die de HF Voyager gewerkt hebben een certificaat te overhandigen waarmee het contact wordt bevestigd. De actuele locatie van de HF Voyager en de gebruikte modus vind je terug op de HFV Portal.

copy van de zumspot

nanoPi NEO – MMDVM Nano Hotspot

Simply what it is :

Simply :   Do not make it complicated, it can replacing dvmega, openspot, cheaper, more features, using the pi-star system firmware.

Details at the pi-star Facebook group:  Join

Advanced settings

Advanced settings

Expert mode:
http: //pi-star/admin/expert/edit_mmdvmhost.php
Role: To modify the frequency offset, delay and other parameters, it is recommended to adjust the default configuration as shown above

SSH background login log need a little knowledge of Linux, this is not a fool tutorial ^ _ ^
Click for larger image

MMDVM Nano Hotspot – Auxiliary tools

Auxiliary tools

When direct access to http: // pi-star is not available, be sure to use these tools to get pi-star’s IP, use IP access

LAN IP Scanning:
Apple phone  –  https://itunes.apple.com/us/app/inet-network-scanner/id340793353?mt=8
Android phone –  http://as.baidu.com/software/11330188.html
Android WiFi Hotspot Check IP  –  http://mobile.baidu.com/item?docid=11483202&source=s1001

JumboSPOT

2018年3月3日 星期六

mmdvm host for windows

if you have cp210x or ft232rl or pl2303 any other serial to usb you can test jumbospot for windows  instead raspberry

pls download

http://www.taozhengbo.com/MMDVM Host For Windows.zip

open and change MMDVM-H.ini

[General]
Callsign=BH8XXX  #change to your callsign
Id=46080XX  #change to your dmr id

[Modem]
Port=\\.\COM3   # change to your cp2102 installed driver ’s com port my is com3

run  DMR – 2.2.bat           is for nextion 2.2 tft hmi lcd

run  DMR.bat           is for dmr

run   P25.bat       is for P25

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How To SET RXOFFSET or TXOFFSET

 

HOW TO SET RXOFFSET(TXOFFSET)

Some board Need set offset,so pls visit  http://pi-star/admin/expert/edit_mmdvmhost.php  or http://ip/admin/expert/edit_mmdvmhost.php

Change RXOFFSET and TXOFFSET to xxx(500 maybe ok) and click apply.

and test BER <=5% is OK.
—————————————————

setting offset for mmdvm host for windows

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2018年1月16日 星期二

how to connect mmdvm modem to gm300

diy cable connect like this

MMDVM PTT 3———————–RADIO PIN 3 PTT

MMDVM TX 5———————-RADIO PIN5 TX AUDIO

MMDVM RX 6———————-RADIO PIN 11 RX AUDIO

MMDVM GND 9 or 10———————-RADIO PIN 7 GND

 

first kill MMDVMHost
then
MMDVMCal /dev/ttyAMA0
keyboard D for DMR mode
key board space for TX
then Adjust TX blue 100K P41(near TP42)
you can see IF Spectrum Left 5 line Right 5 line
Adjust TX BLUE 100K P41  the Red line line is the lowest then ok
then press q to quit

vi /etc/MMDVM

remove # to enable
CWIdTXLevel=50
D-StarTXLevel=50
DMRTXLevel=50
YSFTXLevel=50
P25TXLevel=50

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JumboSPOT RTQ(READY TO QSO) Manual

JumboSPOT RTQ(READY TO QSO) Manual

The JUMBO-SPOT-RTQ is a completely self-contained digital hotspot supporting all four amateur digital communication modes. (DMR, D-Star, P-25 and System Fusion) All that’s required for operation is a power source and WiFi based internet connection.

Designed specifically for use with the MMDVM open source software platform created by Jonathon Naylor (G4KLX). The Pi-Star digital voice dashboard software created by Andrew Taylor (MW0MWZ) is pre-installed and extremely easy set up right out of the box. Pi-Star’s unique automated software update feature make it very easy to keep your JUMBO-SPOT-RTQ up to date with the most current software and features.

Jumbo Spot has a built-in OLED status display that indicates the active mode of operation as well as the call sign and talk group of the current user. The built-in UHF (430-450Mhz) programmable simplex radio allows easy access from your digital handheld or mobile radio.

The Built-in WiFi 802.11bgn network radio makes connecting with multiple wireless routers, cell phone hotspots or mobile routers easy and seamless. The JUMBO-SPOT-RTQ will select the nearest pre-programmed wireless network automatically.

come with ZERO W(with wifi)+jumbospot(UHF+VHFnot main band)+TF8g(pi-star)+ANT433mhz

Specifications

802.11 b/g/n wireless LAN

1GHz, single-core CPU

512MB RAM

Micro USB power

installed JumboSPOT UHF(430-440)+VHF(144-146)

(VHF is not the main band, performance reduction)RF extend board.

8G TF CARD Installed PI-STAR panel

support DMR,YSF,P25 mode to QSO with RF To internet

128*64 i2c OLED Display

Default installed pi-star to TF card, wifi TEST SSID is TZB,pass is 13902982913,you can change your router ’s default SSID and pass it will auto connect.

or you can

visit http://www.pistar.uk/wifi_builder.php input your home ssid and psk ,then download the wpa_supplicant.conf inside with have your home ssid and psk,then save to TF card ,ROOT root directory example F:\  then power on it ,wait 2-3 minutes ,it will auto connect your home ’s ssid,you can check your wifi router to see the pi-star host connected and it’s ip.

also you can use your pc to ping pi-star ,if success,you can open http://pi-star or your pi-star’s ip  default login user is pi-star,

pass is raspberry,then login to SET your CALLSIN,ID,FREQ,and Modem,like the picture:

Display Type is :OLED then Apply Changes.

Below A,B and C is Important! Pls Check.

Select A and Click Apply Changes ,then Input B and Apply Changes

also your DMR radio must input the Talk Group and Freq ,then you can talk now.

More info

http://www.pistar.uk

http://www.pistar.uk/dmr_bm_talkgroups.php

if you have problem you can install the pi-star IMAGE file to TF card and try again :

http://www.pistar.uk/downloads/

http://www.pistar.uk/downloads/Pi-Star_RPi_V3.4.8_08-Dec-2017.zip

OLED is Only Display While your WIFI connected,and Display Type OLED Selected in pistar

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2018年1月3日 星期三

how to upgrade fw

thank you vk4tux ’s script  pls  save as update_hs.sh
then chmod+x update_hs.sh
./update_hs.sh
#!/bin/bash -x

sudo service mmdvmhost stop

sudo pkill MMDVMHost

cd /tmp

sudo rm 7021_HShat.ino.bin

sudo rm *.*.bin.*

sudo wget http://vk4tux.duckdns.org/xMMDVM/BOSSA/bin/7021_HShat.ino.bin
sudo chmod 664 7021_HShat.ino.bin
sleep 2
sudo pkill MMDVMHost
sudo pkill mmdvmhost.service

sudo stm32flash -v -w 7021_HShat.ino.bin -g 0x0 -R -i 20,-21,21:-20,21 /dev/ttyAMA0

echo “Rebooting Pi”

sleep 30

sudo reboot

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2017年12月9日 星期六

HOW TO INSTALL JumboSPOT(2017/11/17)

HOW TO INSTALL JumboSPOT(2017/11/17)

JumboSPOT is a raspberry module for digital radio IP gateway / hotspot

Key features:

Supports DMR (Brandmeister, DMRplus), D-Star (DCS, REF/DPlus, XRF/DExtra, XLX), System Fusion (FCS, YSFReflector) networks.

about the ANT,if you use inside ant,pls unsolder c27 and sma

if you use the sma and ant unsolder c28 disconnect inside ant

DUAL MODE support VHF,UHF(144,220,434,900)

download the pi star

http://www.pistar.uk/downloads/

download image file is : Pi-Star_RPi_V3.4.8_08-Dec-2017.zip

 

press Write wait finished,and powered the rpi

Setting is :

and pree ptt ,you can listen 3100 talking group

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2017年11月17日 星期五

JumboSPOT mmdvm hotspot for pi-star



  • High performance 32-bit ARM processor
  • · Fully assembled and tested
  • · Supports DMR, P-25, D-Star and System Fusion
  • · Onboard LEDs to show status (Tx, Rx, PTT, Mode)
  • · Up to 10mW RF power
  • · SMA antenna connector, UHF antenna included
  • · Mounts cleanly on all current Raspberry Pi’s including the Pi Zero
  • · The firmware is pre-loaded and is easily upgraded via software.
  • · Open source 3D printable case available
  • ·  144-146MHZ,220 Version and 430-450MHz , 433MHZ and 900MHz Version

am zenders in nederland

 

Middengolf (MG/AM)


Hoogvermogen vergunningen:

Freq. (kHz)

kW (EiRP)º

Omroep¹

Prov.

Zenderlocatie²

Coördinaten

Foto’s³
1008

100

Groot Nieuws Radio (vergunning tot 1-9-2022)

Fl

Zeewolde

05e25/52n22

1 2 3 4 5
1116

0.501

Radio Bloemendaal (vergunning tot 1-9-2021)

NH

Bloemendaal

04e36/52n24

1 2

1566

1

Vahon Hindustani Radio (vergunning tot 1-9-2022)

ZH

Den Haag

04e248/52n03

1 2
1602

0.501

KBC Radio (07-19u), Radio Seagull (19-07u) (vergunning tot 1-9-2022)

Fr

Harlingen (zendschip) /
Pietersbierum

05e24/53n10 /
05e28/53n12

1 2 3 4 5 /
1 2 3

Laagvermogen vergunningen:

Freq. (kHz)

kW (PEP)º

Omroep¹

Prov.

Zenderlocatie²

Coördinaten

Foto’s³
675

0.1

HOTRADIO Hits

Ov

Bornerbroek

06e39/52n18

675

0.1

HOTRADIO Classics

Fl

Emmeloord 

05e44/52n41

675

0.1

Radio Nostalgie

Fr

Kollumerzwaag

06e04/53n15

675

0.1

Radio Babylona

Gr

Musselkanaal

07e01/52n55

1 2 3 4 5
675

0.1

Radio 202

ZH

Warmond 

04e30/52n11

675

0.1

Unique

Gld

Wijchen 

05e44/51n48

747

0.1

Salland 747 AM

Ov

Deventer    

06e14/52n15

747

0.1

Cupra Radio

Dr

Emmer-Compascuum

07e02/52n48

1
747

0.1

Radio Seagull (07-19u),
Radio0511 (19-07u)  

Fr

Harlingen (zendschip)

05e24/53n10

1 2 3 4 5  

747

0.1

Radio Overland

Lb

Maastricht 

05e43/50n50

747

0.05

Different Radio 747 AM

Gld

Nijkerk

05e29/52n11

1 2
747

0.1

Radio 4 Brainport

NB

Waalre

05e28/51n24

747

0.1

Groeistad Radio

ZH

Wassenaar

04e23/52n07

1
828

0.1

Radio Bontekoe

NH

Hoorn

05e02/52n38

1 2
828

0.1

HOTRADIO Hits

Gld

Huissen

05e55/51n56

1
828

0.1

Wereldstad Radio Rotterdam AM828

ZH

Rotterdam (Hoogvliet)

04e21/51n51

1 2 3 4
828

0.05

Quality RTV B.V.*

Ut

Utrecht   

05e08/52n04

1
891

0.1

Fidelio Radio

Ut

Driebergen-Rijsenburg

05e16/52n03

1 2 3
891

0.05

Radio City International

NB

Zeeland  

05e40/51n41

1035

0.1

Neverland AM

Lb

Venlo

06e11/51n23

1 2
1224

0.1

Extra AM

NH

Amsterdam

04e49/52n21

1224

0.05

Radio Eldorado

Fr

Damwâld

05e59/53n17

1 2
1224

0.1

Radio Emmeloord

Fl

Emmeloord

05e44/52n43

1
1224

0.1

Radio T-POT

Dr

Gasselternijveen

06e50/52n59

1 2 3 4
1224

0.1

Radio Overland
(deelt de 1224 met De Radio 1224)

Gld

Lunteren

05e37/52n05

1
1224

0.1

Radio 1224
(deelt de 1224 met Radio Overland)

Gld

Lunteren

05e37/52n05

1
1224

0.1

United AM

Gld

Neede

06e36/52n08

1
1224

0.1

Kilrock 1224 AM

ZH

‘s-Gravendeel

04e37/51n46

1224

0.1

Nostalgie AM

Gr

Siddeburen

06e51/53n14

1251

0.1

Memories 1251 AM

NB

Geffen

05e27/51n44

1
1332

0.1

Radio Transparant
(deelt de 1332 met Radio Flandria uit Hemelum)

Fl

Creil

05e39/52n45

1
1332

0.1

Sterrekijker AM

Dr

Elim

06e34/52n40

1
1332

0.1

Citrus AM
(deelt de 1332 met Witte Bizon)

Gld

Emst

05e58/52n19

1
1332

0.1

Witte Bizon
(deelt de 1332 met Citrus AM)

Gld

Emst

05e58/52n19

1332

0.05

Alfa Radio

Ov

Haaksbergen  

06e44/52n09

1332

0.1

Radio Flandria
(deelt de 1332 met
Radio Transparant uit Creil)

Fr

Hemelum

05e27/52n52

1
1332

0.1

Impact AM

ZH

Wassenaar 

04e23/52n07

1332

0.1

Radio0511

Fr

Ternaard

05e58/53n23

1
1395

0.05

Barkey *

Fl

Almere Buiten

05e16/52n24

1395

0.1

Loostad Radio

Gld

Apeldoorn

05e57/52n13

1 2 3

1395

0.1

Cupra Radio

Dr

Emmer-Compascuum

07e02/52n48

1
1395

0.1

Radio Seabreeze AM

Fr

Grou

05e49/53n05

1 2 3
1395

0.1

Studio Denakker

Dr

Klazienaveen

06e59/52n43

1395

0.1

Happy AM

Zld

Middelburg

03e36/51n30

1
1395

0.1

Q-AM 1395

Gld

Waardenburg

05e15/51n50

1
1395

0.1

Radio 202

ZH

Warmond

04e30/52n11

1395

?

West Coast Radio

ZH

Katwijk aan Zee

04e24/52n12

1485

0.001

Columbia AM

Gld

Aalst

05e07/51n46

1
1485

0.001

Radio Impuls

Ut

Amersfoort 

05e24/52n09

1 2
1485

0.001

AMsterdam 1485

NH

Amsterdam

04e51/52n22

1
1485

0.001

Veluwe Centraal

Gld

Apeldoorn

05e57/52n12

1 2 3
1485

0.001

Flashback 1485 AM

Ut

Baarn

05e16/52n12

1
1485

0.001

Dreamradio AM

Lb

Baexem

05e52/51n13

1 2
1485

0.001

Tol *

Fr

Buitenpost      

06e09/53n15

1485

0.001

Amplivier Radio

Fr

Damwâld

05e59/53n17

1
1485

0.001

Hollands Palet

ZH

Den Haag

04e15/52n05

1
1485

0.001

Veluwe AM

Gld

Ermelo

05e40/52n16

1485

0.001

Engelen *

Ov

Goor      

1485

0.001

Radio Hoogeveen AM

Dr

Hoogeveen

06e29/52n43

1
1485

0.001

Veluws Genot

Gld

Oldebroek

05e54/52n26

1485

0.001

Radio0511

Gr

Rhederbrug

07e10/53n05

1485

0.001

Wereldstad Radio Rotterdam AM828

ZH

Rotterdam

04e29/51n55

1
1485

0.001

Radio Koekoek

NB

Rijswijk

05e01/51n47

1 2
1485

0.001

Monti Radio

Gld

‘s-Heerenberg

06e15/51n52

1

1485

0.001

More Radio

Fr

Sneek

05e40/53n01

1
1485

0.001

Eye Radio

Gld

Tiel   

06e09/53n15

1485

0.001

Quality RTV B.V.*

Ut

Utrecht   

05e04/52n07

1 2
1485

0.001

Vintage Music Radio

Zld

Vlissingen

03e33/51n28

1

1485

0.001

Voorburgse Radio Centrale West

ZH

Voorburg

04e20/52n03

1
1485

0.001

Wijkradio

NB

Waalwijk

05e03/51n41

1
1485

0.001

Alfa Radio

Ov

Zwolle

06e06/52n30

1 2
1584

0.1

Antenne Domstad

Ut

Utrecht

05e07/52n05

1

 

Toelichting:
º = max. EiRP of PEP waar men mee mag uitzenden volgens vergunning in kiloWatt (kW).
¹ = klik op een omroep om de website van de betreffende omroep te zien.
² = klik op zenderlocatie om deze in Google Maps of Google Earth te zien.
³ = klik op een foto om de zendmast en/of antenne(s) per zendlocatie te zien.
* = naam vergunninghouder
Prov. = Provincie Dr = Drenthe Lb = Limburg ZH = Zuid Holland
Fl = Flevoland NB = Noord Brabant Zld = Zeeland
Fr = Friesland NH = Noord Holland
Gld = Gelderland Ov = Overijssel
Gr = Groningen Ut = Utrecht
  = Geplande zender en/of gecoördineerde frequentie  = Nieuwe foto van zendmast en/of antenne(s) systeem

Nagenoeg alle EiRP vermogens zijn overgenomen uit informatie van het Antenneregister,
Overzicht omroepvergunningen (Agentschap Telecom) . Doordat deze lijsten qua EiRP vermogens verschillen is niet duidelijk welke lijst klopt. De “oude” vermogens (uit 2003) zijn terug te vinden in ons zerobase archief.  Wij zijn niet verantwoordelijk voor deze informatie. Wij zijn niet verantwoordelijk voor deze informatie.

Terug naar de startpagina / e-mail: radio_stations@hotmail.com

auto antenne tuner test

From March 2010 QST © ARRL
PRODUCT REVIEW
Mark J. Wilson, K1RO
Product Review Editor
k1ro@arrl.org
Bottom Line
Reviewed by Phil Salas, AD5X
QST
Contributing Author
QST
has previously reviewed in-shack
and remote automatic antenna tuners de
signed for various applications and power
levels.
1,2
Recent interest in 43 foot multiband
vertical antennas available from several
vendors has led to a corresponding interest
in remote auto tuners used specifically with
these antennas. This is because the 1:4 unun
(unbalanced to unbalanced transformer)
typically mounted at the vertical’s base for
matching to 50
coaxial cable provides a
compromise SWR on 60 through 10 meters.
SWR is very high on 160 and 80 meters
resulting in corresponding coax and unun
losses.
This review will focus on three 200 W
auto tuners and specifically their suitabil
ity for remote outdoor use at the base of a
43 foot multiband vertical antenna. The units
reviewed (from lowest to highest cost) are
the MFJ-927, CG Antenna CG-3000 and
SGC SG-230.
43 Foot Antenna
Measurement Methods
According to the
EZNEC
antenna mod
eling program, a 43 foot vertical has an
impedance of 3 –
j
620
on 160 meters when
installed over a perfect ground and not in
close proximity to other objects. For bench
testing a tuner’s ability to match this load on
160 meters, I built a simulator circuit with an
impedance of 14 –
j
590
. I used 20
and
50
Caddock thick film resistors in parallel
to give the total real resistance of 14
. This
simulates 3
of radiation resistance plus
11
of ground loss, which is probably bet
ter than most hams have on 160 meters. To
Remote Automatic Antenna Tuners and the
43 Foot Vertical
Figure 1 — Test setup used by the author for measuring expected tuner loss with a
load that simulates the impedance of a 43 foot vertical antenna on 160 meters.
See text for details.
There are pros and cons to using a remote automatic antenna tuner with an un
tuned antenna such as the popular 43 foot vertical. On the plus side are operating
convenience and reduced SWR related coax losses. Cons include limited reactive
tuning range and tuner losses. If you plan your remotely tuned antenna system
properly, a remote auto tuner can be an excellent answer for multiband operation.
1
J. Hallas, W1ZR, “Automatic Antenna Tuners
— A Sample of the Field,” Product Review,
QST
, May 2004, pp 71-76.
QST
Product
reviews are available on the Web at
www.
arrl.org/members-only/prodrev
/.
2
J. Hallas, W1ZR, “Medium to High Power Auto
Antenna Tuners — The Evolution Continues,”
Product Review,
QST
, Aug 2006, pp 56-61.
simulate the reactive component, two 300 pF,
1 kV silver-mica capacitors in series provide
j
590, a compromise reactance between the
theoretical –
j
620 and the –
j
550 that I mea
sured on my own 43 foot vertical.
Because maximum inductance and high
est RF current occur on 160 meters due to the
antenna’s high capacitive reactance and low
resistive impedance, this simulator circuit
also permits the measurement of expected
auto tuner loss when used with a 43 foot
vertical on 160 meters. To measure the loss,
I used an Array Solutions PowerMaster
power/SWR meter and Tektronix TDS-2022
digital sampling oscilloscope as shown in
Figure 1. I first compared the TDS-2022
and PowerMaster by feeding a 50
resistive
load directly and comparing the computed
power level from the TDS-2022 display to
the PowerMaster readings. The worst case
measurement difference between the two
instruments was 3%.
I set the PowerMaster to read net (forward
minus reflected) power and inserted a high
power 3 dB attenuator at the transceiver out
put to ensure that reflected power from a less
than perfect auto tuner match is attenuated
6 dB further if re-reflected by the output cir
cuitry. Actual power delivered to the load is
measured by the TDS-2022, which displays
not only the normal oscilloscope waveform
but also digitally displays the frequency,
RMS voltage and peak-to-peak voltage.
Resistive matching range and loss test
ing was performed in the ARRL Lab with a
precision setup similar to that described in
February 2003
QST
and used in tuner reviews
since then.
3
In the course of testing, ARRL
Test Engineer Bob Allison, WB1GCM, noted
that mounting the CG-3000 and SG-230 to a
metal plate improved auto tuner efficiency. It
also eliminated interaction with nearby metal
objects. Without the plate, SWR changed
dramatically with tuner movement on the
metal test bench. Bob suggests bolting the
mounting bracket of either of these tuners to
a metal plate if the unit is installed on a non
conductive surface. (The MFJ-927, which is
3
M. Tracy, KC1SX, “Antenna Tuner Testing
Methods vs Accuracy,” Product Review,
QST
, Feb 2003, p 75.
XCVR
3 dB
Pad
Po
werMaster
(Fwd – Re
v Po
wer)
A
utotuner
under test
14-
j
590
Simulator Circui
t
TDS-2022 Scope
QS1003-Prode
v01
From March 2010 QST © ARRL
Table 2
Testing with AD5X
43 Foot Vertical
MFJ-927
CG-3000
SG-230
Band SWR SWR SWR
160
No tune
No tune
1.4:1
80
1.3:1
2.0:1
1.4:1
60
1.0:1
1.2:1
1.2:1
40
1.0:1
1.2:1
1.3:1
30
1.5:1
1.1:1
1.5:1
20
1.5:1
1.3:1
1.0:1
17
1.2:1
1.5:1
1.4:1
15
1.1:1
1.3:1
1.9:1
12
1.2:1
1.7:1
1.8:1
10
1.2:1
1:9:1
1.3:1
Table 1
Tuned SWR with Short Circuit or Open Load
—– MFJ-927—–
—– CG-3000 —–
—– SG-230—–
Band Short Open
Short Open
Short Open
160
No tune
No tune
No tune
No tune
No tune
1.4:1
80
No tune
No tune
No tune
1.3:1
No tune
1.0:1
40
2.9:1
No tune
No tune
1.7:1
No tune
2.3:1
30
No tune
No tune
No tune
2.4:1
1.2:1
1.2:1
20
4.0:1
5.0:1
1.1:1
2.2:1
1.7:1
3.0:1
17
4.0:1
No tune
1.6:1
No tune
1.9:1
1.3:1
15
No tune
3.8:1
1:4:1
1.3:1
1.6:1
1.7:1
12
No tune
No tune
No tune
1.3:1
No tune
No tune
10
1.3:1
1.9:1
1.8:1
No tune
No tune
2.0:1
Figure 2 — Each auto tuner was tested at the base of the author’s 43 foot vertical antenna.
built on a metal plate with integral mounting
tabs, did not exhibit this behavior.)
The ARRL Lab also tested the auto tuners
with open and short circuit loads. With
loss
less
tuner components, an open/short tuning
solution is not possible. But no practical an
tenna tuner is lossless because it is built with
pedance of my 43 foot vertical on 60 meters
as 48 –
j
0
, which implies my ground loss
is 12
on that band. Once the tuner found
a match, I recorded the SWR measured in
my shack with the PowerMaster, as shown
in Table 2.
MFJ-927 REMOTE AUTOMATIC
ANTENNA TUNER
The MFJ-927 is the smallest of the three
auto tuners tested here. It is enclosed in
a weather protected container, but is not
O-ring sealed. For extended outdoor opera
tion, it would be a good idea to place the
tuner under a protective cover, such as an
inverted plastic storage bin.
Coaxial and random wire outputs are
provided, along with an SO-239 UHF
jack for the station feed line and a ground
post. The MFJ-927 receives dc power on the
coax feed line via an internal bias-T, so you
won’t need to run a separate cable for power.
MFJ supplies an MFJ-4117 bias-T for inserting
+12 V dc on the coax in the shack. The
outside of the unit and internal circuitry are
shown in the accompanying photos. Note
that the inductors consist of a mix of toroidal
and wide spaced air wound inductors.
Unlike the CG-3000 and SG-230, the
MFJ-927 does not specify minimum an
tenna lengths for tuning the ham bands, but
instead specifies a resistive tuning range on
all bands. A little calculator work shows
that with the 25 μH maximum inductance
available in the MFJ-927, the minimum
length antenna for 160 meters would need
to be about 80 feet. Therefore the MFJ-927
does not have the inductance range required
for using my 43 foot vertical on this band.
I verified this by connecting the simulator
circuit to the MFJ-927. The MFJ-927 tried
to find a match for about 10 seconds, and
then gave up.
Open/short test data is shown in Table 1.
Only on 10 meters did the MFJ-927 find an
open and short circuit tuning solution below
a 2:1 SWR.
Next I connected the MFJ-927 to the base
of my 43 foot vertical. Tuning was very fast,
with initial tuning typically occurring in less
than 2 seconds and tuning from memory
essentially instantaneous. As expected, the
MFJ-927 could not tune the 43 foot vertical
on 160 meters but found a 1.5:1 or better
match on 80 through 10 meters. Note that
an external inductance can be used to allow
160 meter operation (see sidebar on page
52). The results are shown in Table 2.
Last came the ARRL Lab testing of the
resistive load tuning range and loss mea
surements. As you can see in Table 3, the
MFJ-927 matched all resistive loads the Lab
presented to it. While there were a few cases
where the SWR didn’t reach the 1.5:1 target,
components of finite Q. The Lab discovered
that an antenna tuner can sometimes tune into
its own internal losses and present a matching
solution to the transmitter. Results of these
tests are shown in Table 1. Generally, fewer
cases where this happens indicates lower
intrinsic tuner losses.
Tuning sensitivity was also measured.
This is the RF power and SWR required to
automatically initiate a retune. All three auto
tuners specify a “must start a retune” when
the SWR exceeds 2:1.
For final testing, each auto tuner was
connected to the base of my 43 foot verti
cal and tested on each band (Figure 2) with
my 100 W transceiver. Sixty feet of
1
2
inch
Andrew Heliax connects my transceiver in
the shack to the auto tuners at the base of
the 43 foot vertical. Three ground rods and
approximately 20 radials provide my RF and
dc grounding at the antenna — certainly not
a perfect ground, but probably not atypical.
As a reference, I measured the resonant im
From March 2010 QST © ARRL
Table 3
MFJ-927
Manufacturer’s Specifications
Maximum power: 200 W PEP SSB/CW,
125 W continuous.
Minimum power for tuning: 2 W.
Frequency range: 1.8 to 30 MHz.
Tuning time: 6 seconds (initial tuning),
<0.2 second if memorized.
Impedance matching range: 6 to 1600
Ω.
Matching network: Reversible-L (series
L/shunt C or shunt C/series L).
Capacitor range: 0-3961 pF (256 tuning
steps).
ARRL Lab
Testing
Current draw: 200 mA when tuning, 13 mA static
Tuning sensitivity: At 10 W or higher, 2:1 SWR starts a retune.
Measured power loss into resistive loads (%) / Input SWR at match.
SWR
Load (
Ω)
160 m
80 m
40 m
20 m
10 m
16:1
3.125
47
21
26
13
*
1.6
**
1.6
**
1.6
8:1
6.25
31
14
27
15
*
**
**
**
1.7
**
4:1
12.5
*
*
*
*
16
**
**
**
**
1.8
2:1
25
*
*
*
*
*
**
**
**
1.6
**
1:1
50
*
*
*
*
*
**
**
**
**
1.6
2:1
100
*
*
*
*
27
**
**
**
**
1.6
4:1
200
11
13
*
*
22
**
1.7
1.6
**
1.6
8:1
400
12
*
*
*
20
**
**
**
**
1.6
12:1
600
*
12
17
14
24
**
1.6
**
**
**
16:1
800
30
12
17
14
24
**
1.8
1.8
**
1.6
*Power loss less than or equal to 10%.
**Matched SWR less than or equal to 1.5:1.
Inductor range: 0-24.86 μH (256 tuning
steps).
Tuning start: 2:1 SWR
Tuning target: Less than 1.5:1 SWR
Memory channels: 2500
Memory resolution: 2 kHz on 160 meters,
scaling to 28 kHz on 10 meters
Size: 7.5 × 5.5 × 9 inches; weight 3 pounds.
Power supply: 13.8 V dc ±10% at less than
750 mA.
Price: $230.
in most cases the 1.5:1 target specification
was met. The ARRL Lab also verified the
2:1 “must start tuning” specification.
The MFJ-927 has the ability to be remote
ly forced to retune on any given frequency
with its
Sticky Tune
feature. In software ver
sion 2.4 or greater, if Sticky Tune is enabled,
the MFJ-927 will always retune the first time
you transmit after a power cycle. This feature
is convenient if the SWR doesn’t settle as low
as you like and you’d like to force a retune. If
you want to try for a lower tuned SWR on a
given frequency, simply cycle power and then
transmit on that frequency. The MFJ-927 will
retune on that frequency only. Other memory
locations will be unaffected.
MFJ-927 Summary
The MFJ-927 is a fast-tuning, inexpen
sive remote auto tuner that will give good
performance from 80 to 10 meters when
used with a 43 foot vertical. Its Sticky Tune
feature provides a simple way to remotely
force a retune on any frequency without
affecting other memories. In a permanent
installation, some sort of cover for weather
protection would be a good idea.
Manufacturer
: MFJ Enterprises, PO Box
494, Mississippi State, MS 39762, tel 800-
647-1800;
www.mfjenterprises.com
.
CG ANTENNA CG-3000 REMOTE
AUTOMATIC ANTENNA TUNER
The CG-3000 is enclosed in an O-ring
sealed ABS plastic weatherproof container.
It includes attached stainless-steel mounting
brackets as well as two U bolts should you
wish to mount the CG-3000 on a mast. The
provided power cable, about 12 feet long,
plugs into the CG-3000 via a four pin connec
tor included on the cable. Next to the power
connector is an SO-239 for the station feed line
and a metric wing nut ground connection that
fits a #10 solder lug. The CG-3000 antenna
output is a single ceramic-insulated terminal
that is also a good fit for a #10 solder lug. As
seen in the accompanying photo, all inductors
are close wound air-core inductors.
CG Antenna specifies a minimum an
tenna length of 8 meters (26 feet) for 1.8 to
30 MHz operation, or 2.4 meters (8 feet) for
3.5 to 30 MHz. Those specifications, along
with the specified inductance range, indicate
that the CG-3000 will provide full coverage
from 160 through 10 meters with a 43 foot
vertical. Testing showed this was not the
case. When I connected the simulator circuit,
the CG-3000 was unable to find a match.
This implies that either the CG-3000 does
not have the advertised inductance range,
or the tuning algorithm fails to do the job
on 160 meters.
During resistive load testing in the ARRL
Lab (Table 4), you can see that the resis
tive tuning range on 160 meters is limited
compared to the other bands. There were
also some resistive impedances on 40 and
10 meters that could not be matched. ARRL
Lab open/short test results are shown in
Table 1. As you can see, tuning solutions at
or below 2:1 SWR are found on most of the
HF bands for opens or shorts.
Under some conditions the SWR settles
close to 2:1, which is the target SWR. In
those cases, I found that once the CG-3000
is tuned I could exceed a 2:1 SWR by mov
ing frequency within that band, but a retune
won’t occur until the SWR increases to
From March 2010 QST © ARRL
Table 4
CG Antennas CG-3000
Manufacturer’s Specifications
Maximum power: 200 W PEP,
125 W continuous.
Minimum power for tuning: 10 W.
Frequency range: 1.8 to 30 MHz.
Tuning time: 6 seconds (initial tuning),
<0.2 second if memorized.
Impedance matching range: Not specified.
Matching network: Low-pass pi or
reversible-L as needed (C-L-C)
Input capacitor range: 0-6300 pF
(100 pF increments).
Output capacitor range: 0-775 pF
(25 pF increments).
ARRL Lab
Testing
Current draw: 750 mA when tuning, 413 mA static
Tuning sensitivity: At 10 W, 3.2:1 SWR starts a retune; at 50 W, 2.5:1 SWR.
Measured power loss into resistive loads (%) / Input SWR at match.
SWR
Load (
)
160 m
80 m
40 m
20 m
10 m
16:1
3.125
No tune
*
No tune
48
No tune
n/a
**
n/a
2.0
n/a
8:1
6.25
13
18
20
36
No tune
**
**
**
**
n/a
4:1
12.5
12
20
17
20
25
**
1.9
**
**
**
2:1
25
29
17
27
19
12
1.9
1.9
2.0
**
**
1:1
50
24
*
*
13
*
**
**
**
**
**
2:1
100
24
*
14
31
15
2.1
**
**
1.9
**
4:1
200
No tune
11
12
11
22
n/a
**
**
**
**
8:1
400
No tune
11
14
14
18
n/a
**
**
**
1.6
12:1
600
No tune
20
14
15
35
n/a
1.8
**
**
2.0
16:1
800
No tune
38
23
24
42
n/a
**
**
1.6
1.9
*Power loss less than or equal to 10%.
**Matched SWR less than or equal to 1.5:1.
Inductor range: 0-64 μH
(0.25 μH increments).
Tuning start: 2:1 SWR.
Tuning target: Less than 2:1 SWR.
Memory channels: 200.
Memory resolution: 5 kHz on 160 meters,
scaling to 200 kHz on 10 meters.
Size: 12.2 × 9.5 × 2.8 inches; weight
13 ounces.
Power supply: 13.8 V dc ±10% at less than
800 mA.
Price: $330.
above 3:1. Unfortunately there is no easy
way to force a retune. The only way I could
force a retune was to short the output of the
CG-3000, let it try to tune, then reconnect
the load and let it tune again. I found one
other issue. The CG-3000 does not time
out if it cannot find a tuning solution. It just
continues to tune until you either remove RF
drive, or turn off power to the unit.
After completing bench testing, I con
nected the CG-3000 to the base of my
43 foot vertical and measured the tuned
SWR. Except for 160 meters, tuning solu
tions were found quickly. In most cases, the
final match was better than the 2:1 target.
Results are shown in Table 2.
The optional CG-CTU control unit adds
power and reset switches, along with power
and tuning LEDs. The reset switch puts the
tuner in bypass, but does not erase memories
or force a retune
CG-3000 Summary
The CG-3000 can reliably be used on 80
through 10 meters with a 43 foot vertical,
but not on 160 meters as advertised. The
solution presented in the sidebar may work
for the CG-3000 but this was not verified. Its
inability to time out when a match cannot be
found is an irritant, but not really a problem.
Its failure to meet its 2:1 “start tuning” speci
fication is an issue, however, especially since
there is no easy way to force a retune.
Manufacturer:
CG Antenna, 5/501, Lane
1800, Hanri Rd, 200336 Shanghai, China;
sales@cgantenna.com
;
www.cgantenna.
com
. We purchased the review unit from
Array Solutions, which is no longer handling
CG antenna products. At press time, CG An
tenna was working on details for distribution
of its products in the US.
SGC SG-230 REMOTE
AUTOMATIC ANTENNA TUNER
The SG-230 is enclosed in a rugged
O-ring sealed ABS plastic weatherproof con
tainer. Transceiver RF and power interface
through a 9 foot combination 4 conductor/
RG-58 cable that is permanently attached to
the SG-230. On the coax input side you will
find a
1
4
inch diameter bolt for the ground
connection, and the antenna output is a single
ceramic insulated terminal with a #10 screw
interface. Antenna and ground solder lugs
are provided with the SG-230. All inductors
are close-wound air-core inductors.
SGC specifies a minimum required an
tenna length of 23 feet for operation below
3.3 MHz, and 8 feet for operation above
3.3 MHz. With its specified 64 μH maximum
inductance, the SG-230 should be able to
match a 43 foot vertical on 160 meters. As
before, I first tried tuning on 160 meters with
the simulated load. This time I was success
ful — the SG-230 found a match within a
few seconds, just as it should. At 1.85 MHz,
I measured an SWR of 1.46:1 and 2.1 dB
loss (38% loss).
Table 5 shows the results of the ARRL
Lab testing. All resistive loads were matched.
In most cases the final tuned SWR was less
than 1.5:1, though there were two cases
where the tuned SWR settled close to the
2:1 SWR target. Open/short test results are
shown in Table 1. As with the CG-3000,
the SG-230 can find an open/short tuning
solution of less than 2:1 SWR on most of
the HF bands.
Just like the CG-3000, tuning doesn’t
restart if the SWR changes unless the SWR
From March 2010 QST © ARRL
Inductor range: 0.25-64 μH (0.25 μH
increments).
Tuning start: 2:1 SWR.
Tuning target: Less than 2:1 SWR.
Memory channels: 170.
Memory resolution: 10 kHz on 160 meters,
scaling to 1500 kHz on 10 meters.
Size: 16 × 12 × 3.5 inches; weight 8 pounds.
Power supply: 10-18 V dc at less than
900 mA.
Price: $540.
Table 5
SGC SG-230
Manufacturer’s Specifications
Maximum power: 200 W PEP, 80 W
continuous.
Minimum power for tuning: 3 W.
Frequency range: 1.8 to 30 MHz.
Tuning time: 6 seconds (initial tuning),
<0.2 second if memorized.
Impedance matching range: Not specified.
Matching network: Low-pass pi or
reversible-L as needed (C-L-C)
Input capacitor range: 100-6400 pF
(100 pF increments).
Output capacitor range: 25-800 pF
(25 pF increments).
ARRL Lab
Testing
Current draw: 900 mA when tuning, 450 mA static
Tuning sensitivity: At 10 W, 3.2:1 SWR starts a retune; at 50 W, 2.5:1 SWR.
Measured power loss into resistive loads (%) / Input SWR at match.
SWR
Load (
)
160 m
80 m
40 m
20 m
10 m
16:1
3.125
14
19
29
13
25
**
**
2.1
**
**
8:1
6.25
*
22
13
14
29
**
**
**
**
1.6
4:1
12.5
17
27
13
12
22
**
**
**
**
**
2:1
25
21
11
11
*
28
**
**
**
**
1.8
1:1
50
*
*
*
*
13
**
**
**
**
**
2:1
100
*
*
*
*
23
1.6
**
**
**
**
4:1
200
*
*
*
*
11
**
**
**
**
**
8:1
400
*
*
*
*
32
**
**
**
**
1.6
12:1
600
*
*
*
17
30
**
**
**
1.6
**
16:1
800
*
*
12
22
42
**
**
**
**
**
*Power loss less than or equal to 10%.
**Matched SWR less than or equal to 1.5:1.
increases to over 3:1. Unlike the CG-3000,
the SG-230 has an internal strapping option
that defeats memory tuning. Internal jumper
JP2 bypasses the SG-230’s memories, which
means that the SG-230 will always retune
rather than use previously stored data. This
setting will cause the SG-230 to retune every
time you transmit on a new frequency.
Final testing occurred with the SG-230
attached to the base of my 43 foot vertical.
I was able to find a matching solution on all
bands from 160 through 10 meters with no
tuning gaps. In all but two cases the final
match was under 1.5:1. Results are shown
in Table 2.
The optional Smartlock accessory pro
vides power and reset switches, a tuning lock
function and power and tuning LEDs. The
reset switch puts the tuner in bypass but does
not erase memories or force a retune.
SG-230 Summary
The SG-230 is the only auto tuner of
the three reviewed here that will match a
43 foot vertical on 160 meters. While it
did not meet its “must start retuning at 2:1
SWR” specification, it can be set to disable
memory tuning. This setting forces a retune
upon frequency change at the expense of
tuning speed but in some cases is neces
sary to keep the transceiver happy when
moving around a band. Tuning is almost
instantaneous when recalling previously
stored memory data.
Manufacturer
: SGC Inc, 13737 SE 26th
St, Bellevue, WA 98005; tel 425-746-6310;
www.sgcworld.com
.
Some Final Thoughts
I found this exercise to be very enlight
ening. Besides learning more about tuner
reactive tuning ranges and tuner losses, I also
had never considered that remote auto tuners
could possibly match an open or a short. This
means that you could have a failed connec
tion at the antenna without even knowing it!
Since there is probably at least one frequency
or band where you may have a high but
measurable untuned SWR, it would probably
be worthwhile to record the untuned SWR
so that you can verify connection integrity
if you suspect there might be a problem. All
three auto tuners discussed here come up in
the bypassed mode when power is cycled, so
this is an easy test to make from your shack
with an antenna analyzer (if you apply RF
power the auto tuners will start tuning).
There are definitely benefits to using a
remote auto tuner with an untuned antenna
such as the popular 43 foot vertical. First, of
course, is operating convenience. You simply
transmit a low power carrier for tuning and
then operate. And second, you will reduce
SWR related coax losses. There are always
trade-offs to consider, such as reactive tun
ing range and tuner losses. If you plan your
remote-tuned antenna system properly, a
remote auto tuner can be an excellent answer
for multiband operation.
From March 2010 QST © ARRL
Extending the MFJ-927 to 160 Meters
As discussed in the review, additional
inductance is needed to allow the MFJ-
927 to match a 43 foot vertical on 160
meters. I decided to add some external
inductance to see if this would help the
MFJ-927 tune the antenna on 160 me
ters. I chose to add around 30
μ
H, by
using a 2.5 inch length of MFJ 4004-0008
coil stock. This is an air core coil of #16
AWG tinned copper wire, 2.5 inches in
diameter, wound 10 TPI in series be
tween the tuner output and the antenna
base. If you order this product, you will
get a 10 inch length, so there is plenty
left over for other projects.
I mounted the coil in a 4 × 4 ×
4 inch plastic outdoor electrical box available from most home
improvement stores. I used #8 stainless steel hardware for
the I
N
and
OUT
RF connections. Two binding posts
(MFJ 606-0014) permit shorting the coil
for normal 80 through 10 meter auto
tuner
operation.
I made a simple shorting wire using a
pair of spade lugs. For mounting, I bolted
the assembly to one of the MFJ-927
mounting holes and then connected ev
erything to my 43 foot antenna as shown
in the photo.
How does this work? Absolutely great!
The MFJ-927 now easily tunes 160
meters just as on other bands. The only
disadvantage is that you must manually
select 160 meters or 80 to 10 meters by
adding or removing the shorting strap.
Finally, while this was built for use with my MFJ-927 this same
assembly can be used with any auto tuner that needs addi
tional inductance for matching low frequency, electrically short
antennas.
Phil
Salas,
AD5X

sdr

Apr 182016

 

MagiWOL import[This is a post 2 in series, for hardware setup go here]

The first piece of software we need to get Raspberry Pi running is of course its operating system. If you have a monitor and keyboard attached, you can proceed with NOOBS install without any trouble. If you don’t want to deal with imaging SD card, this is the best as you can even buy it pre-programmed.

However, I like to complicate and thus decided to go with the headless install of Raspbian Jessie Lite. The most noticeable difference between normal Raspbian and Raspbian Lite is that you get a graphical interface only in one of them. Guess which is which.

After creating image and booting machine up with the prepared SD card, one challenge is how to find it. I personally use Import function of MagiWOL to find a new IP around, but you can also log into your router and figure IP from there. Chickens can even attach monitor, I won’t judge. With IP in hand just connect to machine via SSH client (e.g. PuTTY). User name and password are usual pi/raspberry.

First action after fresh install would be to update to the latest packages:

 sudo apt-get update

Next you proceed with installing all the goodies (steps taken from Ham Radio Science):

sudo apt-get install -y git cmake libusb-1.0-0.dev build-essential
git clone git://git.osmocom.org/rtl-sdr.git
cd rtl-sdr/
mkdir build
cd build
cmake ../
make
sudo make install
sudo ldconfig

Now we want to create two scripts. Yes, you can run stuff manually but these scripts are going to make it easier if you want to do it automatically on startup. Notice each is just a single cat command with a lot of data:

cat > /home/pi/rtl-sdr/build/rtl_tcp.sh <<- EOF
!/bin/bash
INTERFACE=eth0
IP=`ip addr show $INTERFACE | grep inet | grep -v inet6 | awk '{print $2}' | cut -d'/' -f1`
if [[ $IP != '' ]] ; then
    /usr/local/bin/rtl_tcp -a $IP
else
    echo "Cannot find IPv4 address on $INTERFACE interface." >&2
    exit 1
fi
EOF

# cat > /home/pi/rtl-sdr/build/rtl_tcp.service <<- EOF
[Unit]
After=network-online.target

[Service]
Type=simple
ExecStart=/home/pi/rtl-sdr/build/rtl_tcp.sh
ExecStop=killall rtl_tcp
Restart=on-failure
RestartSec=10
User=pi

[Install]
WantedBy=multi-user.target
EOF

Finally we have a chutzpah of steps for the remaining details (including disabling TV driver for the SDR device):

chmod +x /home/pi/rtl-sdr/build/rtl_tcp.sh
sudo cp /home/pi/rtl-sdr/rtl-sdr.rules /etc/udev/rules.d
sudo bash -c 'echo "blacklist dvb_usb_rtl28xxu" > /etc/modprobe.d/dvb_usb_rtl28xxu.conf'

If all steps are completed, we can now run our newly created script:

/home/pi/rtl-sdr/build/rtl_tcp.sh
Found 1 device(s):
  0:  Realtek, RTL2838UHIDIR, SN: 00000001
Using device 0: Generic RTL2832U OEM
Found Rafael Micro R820T tuner
[R82XX] PLL not locked!
Tuned to 100000000 Hz.
listening...
Use the device argument 'rtl_tcp=192.168.200.47:1234' in OsmoSDR (gr-osmosdr) source
to receive samples in GRC and control rtl_tcp parameters (frequency, gain, ...).

If you wish program to start automatically, you can also make use of the newly created service file:

sudo systemctl enable /home/pi/rtl-sdr/build/rtl_tcp.service
sudo init 6

After machine is booted back up (it should take less than a minute), you can use your favorite SDR program with a support for RTL-SDR over TCP to connect on port 1234. I personally find SDR# well behaved and problem-free but any other will do too.

PS: All this was done on a default partition that has under 200 MB free. To increase partition size run sudo raspi-config and choose Expand Filesystem.

[2017-01-16: Adjusted file creation commands to work better with shell copy/paste]

  3 Responses to “SDR on Raspberry Pi 3 (Software)”

Comments (3)
  1. what up, i have been following your tutorial, but a i can not execute the script:

    pi@PLANK2:~ $ /home/pi/rtl-sdr/build/rtl_tcp.sh
    ” does not exist.
    /home/pi/rtl-sdr/build/rtl_tcp.sh: line 28: syntax error: unexpected end of file

    but the line 28 does not even exist, any suggestions. sorry if this is a dumb question; i am new in this stuff, i would really like to make it work.

    • Not sure about it – might be some missing quote or so. Did you try just to copy/paste content of that file? That file should be:

      #!/bin/bash
      INTERFACE=eth0
      IP=`ip addr show $INTERFACE | grep inet | grep -v inet6 | awk '{print $2}' | cut -d'/' -f1`
      if [[ $IP != '' ]] ; then
          /usr/local/bin/rtl_tcp -a $IP
      else
          echo "Cannot find IPv4 address on $INTERFACE interface." >&2
          exit 1
      fi
      
  2. The issue is copying/pasting code from Windows machine to remote vnc session.
    Tried the same inside the PI itself and it works.

 

Arduino Morse Decoder

Introduction: Arduino Morse Decoder

This device reads hand keyed Morse code from a signal key (or an ordinary switch) and translates it to plain text and show the Morse code you’re keying on an LCD. I use it to train my own Morse keying skills.

The decoder automatically corrects itself for your keying speed.

Step 1: Requirements

1x Arduino UNO
1x Buzzer
1x LCD with I2C connector and 4 lines of text

https://www.ebay.nl/itm/IIC-I2C-TWI-2004-20×4-LCD-Display-Module-for-Arduino/282278493171?hash=item41b91bfbf3:m:miZzmmklToqoHiSqtwsBbcg

And a switch (or Morse key), breadboard and wires.

Tip: you could create it without an LCD and then output the decoded text on the serial monitor of the Arduino IDE.

Step 2: Hardware Setup

Setup the hardware by hooking up everything as shown in the schematic diagram.

Connect the buzzer between GND and pin 8 of the Arduino and the Morse key (I use a tactile switch) between GND and pin 7.

Besides the GND and +5V pins the LCD has an SCL and SDA connection that you connect to the pins with the same names on the Arduino. I didn’t use pull-up’s to connect the LCD, but you could if you want to.

Step 3: Software

Upload the sketch (Seinsleutel2.ino) in the Arduino. I also included the library that I needed to use to control the LCD.

And start keying (see the video for a demonstration).

 

 

TRANSVERTER INTERFACEBOARD

*

Met deze Transverter Interface & Attenuator-kaart kunt u uw basis HF-radio met de VHF / UHF Transverter verbinden . Dit bord bevat een 30 dB verzwakker met de fijne POT van het uitgangsvermogen en de BYPASS / PTT-relais.

Wanneer de spanningsschakelaar in de UIT- stand staat, bevindt de verzwakkingskaart zich in de HF BYPASS- modus. HF-antenne is verbonden met uw basis-HF-radio via de bypass-relaiscontacten K1 en K3. U kunt werken op HF-banden met een maximaal 100 watt uitgangsvermogen van uw basis HF-radio.

!!!! – VOORDAT U DEZE IN DE BEDIENINGSFUNCTIE VAN DE TRANSVERTER INSCHAKELT OM DE UITGANGSPANNING VAN UW BASIS IN TE STELLEN HF RADIO OVER 5-10 W – !!!!

Om het te laten werken in de VHF TRANSVERTER- modus om + 12 V Stroomschakelaar AAN te schakelen. Nu wordt uw HF-antenne door K2-relaiscontacten van uw HF-radio afgesneden en wordt uw VHF-transverter ingesteld in RX-modus via de K3, K2, K1 relaiscontacten met uw basis-HF-radio. Door de PTT- lijn op de GROUND aan te sluiten, brengt uw VHF-transverter in de TX-modus door de IF-ingang via de ATTENUATOR op de uitgang van uw HF-basisstation aan te sluiten.

Technische specificaties

Verzwakkingsniveau – 30 dB (10 W IN – 0.015 W OUT, bijna tot NUL instelbaar)
RF Input Power – 5 … 10 W (15 W Maximum )
HF bypassvermogen – 100 W
PTT-besturing – Contactsluiting naar de grond
Voedingsspanning – +13,8 VDC (+12 … 14 VDC)
Afmetingen (mm) – 39 x 67

Download daar een kopie van de handleiding

144/28 MHZ TRANSVERTER

144/28 MHZ TRANSVERTER

*** OM MET VERTROUWEN TE KOPEN, KRIJG JE PAYPAL-BESCHERMING! ***

Met deze transverter kunt u op de band van 2 meter werken met elk type HF-radio met de band van 10 meter . Het zou de hele 2m- band op 144 tot 148 MHz werken als je basisradio de 28 tot 32 MHz- band heeft. Het werkt alle modi zoals SSB, CW of FM als het beschikbaar is in uw radio.

Klik op deze foto om hem groot te krijgen

Als u slechts 1 tot 50 mW (0,05 W Max.) Op deze transverter op een 10 m- band toepast, krijgt u ongeveer 10 – 15 W uitgangsvermogen op de 2 m- band. U kunt de ingangsstroom wijzigen met RV1-pot op het bord. Er is geen antennerelais vereist.

Met dit nieuwe model van 144 MHz transverterkaart kunt u bovendien de afzonderlijke RX / TX-uitgangen van uw 28 MHz-basisstation gebruiken.

Klik op deze foto om hem groot te krijgen

We bieden volledig gebouwd en getest in ons labboard. Om het perfect met je radio te laten werken, moet je solderen met de kabels, draden en connectoren.

In het geval dat u deze transverter gaat verbinden met de radio met een uitgangsvermogen van 100 watt, moet u bovendien de verzwakker of een soort interfacekaart tussen uw radio en deze transverterkaart bouwen of kopen.

We hebben een circuit van een eenvoudige verzwakkingskaart met enkele weerstanden en alleen relais. Het kan eenvoudig worden gebouwd door iedereen met een basiskennis in elektronica. Ook vindt u hier een circuit van een mogelijke aansluiting van deze transverterkaart op uw HF-radio.

OF KUNT U DE GEMONTEERDE EN GETESTE ACHTERWAARDE / TRANSVERTER INTERFACE BOARD DAARIN KOPEN

Technische specificaties

RF-bereik – 144 … 148 MHz
IF-bereik – 28 … 32 MHz
IF ingangsvermogen – 1 … 50 mW (max. 0,05 W) of 0 … 17 dBm
LO-frequentie – 116 MHz (3e boventoon van 38,6666 MHz-kristal)
LO-frequentiestabiliteit – +/- 3 ppm
Uitgangsvermogen – 10 … 15 W
RX-versterking – typ. 20 dB
Geluidscijfer – typ. 1.0 dB
Afbeeldingsafwijzing – typ. 70 dB
PTT-besturing – Contactsluiting naar de grond
Voedingsspanning – +13,8 V DC (+12 … 14 V DC)
Stroomverbruik – typ. 2 A (TX)
TX Uitgangstransistor – RD15HVF1
RX- ingangstransistorBF998
Afmetingen (mm) – 80 x 45

Download een kopie van de beschrijving die ik daar bij het bord meeneem

Het circuit van de eenvoudige verzwakker is er

Ik test de transveterborden voordat ik ze in een verzenddoos stop.
Als u niet tevreden bent met de transverter, stuurt u deze terug en krijg ik uw geld terug.

We nemen PayPal en u kunt betalen door op de knop “Nu kopen” te klikken.

Klik op onderstaande knop en koop de TRANSVERTER BOARD voor 30 USD + 7 USD verzendkosten

OF JE KAN SAMEN KOMEN

TRANSVERTER BOARD + ATTENUATOR BOARD voor 35 USD + 10 USD verzending

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