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Author Topic: Beacon Project - 26-27 MHz 11 Meter Band Export Radio + Keyer  (Read 196 times)
R4002
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« on: September 13, 2017, 1806 UTC »

So I found myself thinking about the 11 meter band beacon project again, only this time I'm looking at it at a different angle.  Instead of building a transmitter around a set of crystals or using an old pager transmitter, I'm going to use an export radio.  The radio does have a regular 4-pin microphone connector and a CW key jack on the back.  

I have the following equipment:

*Superstar 3900 transceiver (made in Taiwan, EPT360011Z or EPT3600-11Z main board, built by Ranger/RCI)
frequency coverage 25615-28305 kHz 25.615-28.305 MHz continuously (channelized into 6 bands of 40 channels but has +10 kHz switch and +/- 5 kHz and +/- 1 kHz transmit/receive clairifers
*Antron-99 CB vertical CB antenna (currently in storage but in good condition)
*11 meter dipole antenna kit
*Possible transmit location located on top of an industrial fabrication shop in the downtown area of a medium sized city on the East Coast of the USA, with access to mains (120 Volt AC, 60Hz) power.

My plan is to drop the transmit power of the Superstar 3900 down to 3-4 watts or so to reduce strain on the transmitter.  

The missing piece is the CW generator.  I'm looking for something that doesn't draw a lot of power but will key the radio continuously, without the need for operator intervention.    Does anybody have an experience building a beacon of this type?  I plan on putting the radio on a frequency like 27500 kHz or 27510 kHz (as 27.500 MHz is the commonly accepted frequency for CW activity on 11 meters).  

Anybody have any recommendations or experience putting together a project like this?  I admire the Common and Precious III beacon operating in Europe and want to have a similar beacon operating in my part of the world.  
« Last Edit: September 13, 2017, 2154 UTC by R4002 » Logged
CoolAM Radio
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« Reply #1 on: September 13, 2017, 1921 UTC »

Guess this is interesting for you?

https://www.eham.net/articles/2240

Maybe also check

https://aa7ee.wordpress.com/2015/11/18/the-sproutie-spt-beacon-a-legal-unlicensed-hifer-beacon/

https://aa7ee.wordpress.com/tag/altoids-homebrew/

http://soldersmoke.blogspot.nl/

http://www.qrpkits.com

https://cqbitx.blogspot.nl

André
CoolAM Radio - ShortWave
http://coolam-productions.tk
http://www.coolam.nl
the Netherlands
« Last Edit: September 13, 2017, 1939 UTC by CoolAM Radio » Logged

http://coolam-productions.tk
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R4002
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« Reply #2 on: September 13, 2017, 1948 UTC »

Thanks for the links CoolAM.  What I'm looking for is a beacon board that would allow me to program a CW message onto an IC or something similar, ideally something I could install inside the radio chassis and run off the power from whichever power supply I end up using (probably a 10 amp or something similar for DC power from the main 120VAC power available at the transmitter site).

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« Reply #3 on: September 13, 2017, 2253 UTC »

http://www.hamcrafters2.com/KID2.html

Simple, easy, inexpensive. Smiley

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