27.500mhz beacon from Thailand

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Ken Potha
Posts: 3
Joined: Tue 7. Aug 2012, 09:33

27.500mhz beacon from Thailand

Post 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
dx.digger
Posts: 1
Joined: Sun 6. Mar 2011, 21:37

Re: 27.500mhz beacon from Thailand

Post 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
ʎɐqǝ uo pɹɐoqʎǝʞ ɐ ʎnq ı ǝɯıʇ ʇsɐן ǝɥʇ sı sıɥʇ

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qrz11
Site Admin
Posts: 185
Joined: Thu 10. Feb 2011, 15:29
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Re: 27.500mhz beacon from Thailand

Post by qrz11 »

Hi Ken,

very nice project indeed. I also would suggest 3-5 Watts if possible.

Best 73s

Mike
HEI91
Posts: 1
Joined: Wed 6. Nov 2013, 10:03
Location: Suid Afrikaanse Republiek

Re: 27.500mhz beacon from Thailand

Post 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 :D
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