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Author Topic: HF Beacon, design questions  (Read 1243 times)

Offline greator

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Re: HF Beacon, design questions
« Reply #30 on: June 15, 2020, 1532 UTC »
Its 8MHz only, until i manage to find out why it doesnt play well with my other crystals  :)

Offline syfr

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Re: HF Beacon, design questions
« Reply #31 on: June 18, 2020, 0052 UTC »
You might try replacing the output filter (Pi?) with a 47 ohm resistor to ground. Then test at both frequencies and see what the result is.
NRD525/TenTec Paragon lotsa wires and some beams

Offline Stretchyman

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Re: HF Beacon, design questions
« Reply #32 on: June 18, 2020, 0653 UTC »
Don't use a wirewound one as you have done as it's only 47 ohms at DC!

I use to use 20x1K metal film in parallel.

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Offline greator

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Re: HF Beacon, design questions
« Reply #33 on: June 21, 2020, 0826 UTC »
Somehow the oscillator will not work with certain frequencies, it just doesnt oscillate(tested with the oscillator only). I will have to spend a little more time on the circuit this summer, and order a few more crystals.