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27.500mhz beacon from Thailand
Posted: Tue 7. Aug 2012, 09:46
by Ken Potha
new beacon 100mw, operate just 1transister and lowpass filter
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more detail pls. visit:
http://www.153rt.com/index.php/topic,3547.0.html
Re: 27.500mhz beacon from Thailand
Posted: Mon 20. Oct 2014, 03:12
by dx.digger
Hi Ken
nice beacon project, seems to work well, is it operational yet? I would suggest 5Watts if possible.
I have also noticed a cw beacon on 26.965Mhz but its hard to decode due to A.M and FM signals mixed in.
I think your beacon could be very useful. what antenna would you use? Vertical Omni-derectional or horizontal dipole or yagi?
Cheers Ken
73 Mark
Re: 27.500mhz beacon from Thailand
Posted: Sun 26. Oct 2014, 11:54
by qrz11
Hi Ken,
very nice project indeed. I also would suggest 3-5 Watts if possible.
Best 73s
Mike
Re: 27.500mhz beacon from Thailand
Posted: Fri 14. Nov 2014, 20:45
by HEI91
Hi,
Is this beacon active yet? I would like to see if I can monitor it in Cape Town, South Africa.
What antenna is in use and what is the height of the antenna ? It would be nice if you could increase power to +/-12 watts. You can make use of a 2SC1969 which is relatively cheap Transistor with a half wave vertical antenna , then you will have a low angle of radiation in all directions. With 100mW output , you can use a 2SC2166 as a driver transistor. You can easily recover it from an old CB set. This is only a suggestion though , but I think it is an excellent idea and I thank you for your anticipation. A very reliable beacon in Cape Town is on 28.250 Mhz for propagation.
Best 73's
