Messages

1

The RF Workbench / 15-Watt SHORTWAVE BROADCAST TRANSMITTER

« on: December 02, 2023, 1419 UTC »

For all the tube-haters  among us, I've found an interesting link for a 15 watt 5-7MHz shortwave transmitter (41 - 49 Metres) for only 290 dollars.

Check it out at: https://www.sjvbroadcastservices.com/


Jack
www.stationqrp.com

2

European Pirates and Private Stations / Re: Station QRP 15069 AM 1936 UTC 15 JUL 2023

« on: July 16, 2023, 1257 UTC »

Thanks Skipmuck and Chris! Antenna too close to transmitter and therefor a lot of RF being around the system. Easy to fix...
Not bad with only 8 watts!

73s

3

The RF Workbench / Re: GU-50 Project finished

« on: June 28, 2021, 1339 UTC »

The design is based on approved (Germany, Denmark and UK) xmtr for use on MW and SW.  The approved version has 4 GU50 tubes.

There where 2 demands; parts must be available for years to come and had to comply with international
standards so HFCC membership could be applied for.

73s
Jack

4

The RF Workbench / 40 MTR DSB Digital Transceiver II Kit

« on: May 30, 2021, 0912 UTC »

New from QRPGuys:  40/30/20m DSB Digital Transceiver II Kit!

https://qrpguys.com/qrpguys-dsb-digital-transceiver2

The new QRPGuys DSB Digital Transceiver II is a low cost, multiband, DSB transceiver kit, with three easy plug-in modules for 40/30/20m, (additional module pcb’s available). Changes that Steve Weber (KD1JV) have included are, a high pass filter to help with BCB interference in troubled environments, replaced the relay with solid state switching, and designed a multi-band 160m-17m VFO as an easy plug-in option. The transceiver output remains the same at an approximate 2.5 watts on 40m, over 1.5 watts on 30m, and over 1 watt on 20m. The receiver sensitivity was measured at .4uV (-115dBm). The board is the same size, and all the components are included for the transceiver (3.0″ x 3.12″) and three band modules, for 40/30/20m

73s
Jack
www.stationqrp.com

5

The RF Workbench / GU-50 Project finished

« on: April 20, 2021, 0938 UTC »

After about a year of working on GU-50 shortwave tube transmitter project, I finally finished! Download it, build it, enjoy it as much as I enjoyed it.

https://stationqrp.com/data/gu50transmitter.pdf

73s
Twitter: @StationQRP

6

The RF Workbench / QRP SSB transceiver kit

« on: May 24, 2020, 1213 UTC »

To bring some positive vibes to the Workbench  : Inspiring new designs from EA3GCY.

Third generation of the legendary ILER-40 QRP Transceiver kit. 6 Watt out. VXO varactor, about 50kHz coverage. Very low courrent, less than 35mA (no signal) RX, 1200-1500mA TX. PCB 100x140mm / 180 grams, heatsink included... well under $100... Worth a try!

Have a look at: https://www.qrphamradiokits.com/transceivers/iler-40-20-v3-ssb/#cc-m-product-12106438249

If you're more into tube transmitters follow me via Twitter: https://twitter.com/stationqrp

Stay safe friends!

7

The RF Workbench / New transmitter project via Twitter

« on: October 19, 2019, 1436 UTC »

Hi, I will start this fall on a new shortwave transmitter project with big,
beautiful, warm, glowing tubes!

If you're interested follow me on Twitter with lots of extra's; @StationQRP

73's
Jack

8

North American Shortwave Pirate / Re: unid: 6925U, 7/11, 1219

« on: July 12, 2015, 1008 UTC »

Hello Andrew, pls send me your audio file. Maybe I can help out.

73's Jack
stationqrp@gmail.com

9

The RF Workbench / New circuit diagram

« on: January 20, 2015, 2003 UTC »

My website is updated with the circuit diagram of my 8 watt QRP shortwave transmitter and inverted-v antenna.

I've enclosed the circuit diagram. Hope you like the 'instruction'.

Here’s the link: http://www.stationqrp.com/data/qrptransmitter.pdf

73's
Jack

10

General Radio Discussion / Ho Ho Ho

« on: December 19, 2014, 1642 UTC »

From our home to yours, we wish you a Christmas that is joyful and warm. Season's greetings!

​73's
Jack

www.stationqrp.com

11

European Pirates and Private Stations / Re: Station QRP 6925 AM 2047 UTC 6 Dec 2014

« on: December 07, 2014, 0943 UTC »

Thanks guys, it was well worth the frost last night during my field operation with such great reception reports!

eQSL will follow shortly.

73's
Jack

Station QRP
www.stationqrp.com