[ARC5] OK Smart People- FM Demodulator
David Stinson
arc5 at ix.netcom.com
Fri Jan 18 07:58:50 EST 2013
Calling all "Smart People:"
Doing some research on a "Borg Implant" FM Demodulator
in the hopes of breathing life into many dust-gathering VHF sets.
I found this interesting circuit:
http://jaunty-electronics.com/blog/2012/08/no-tune-ne602-ne612-fm-demodulator/
It's supposed to work between 420-500 KC.
I'm hoping to "tweak" something like this for 15 MC,
since the NE602 / NE612 will work well into UHF.
What puzzles me is the tank circuit L1 / C5.
820 uH and 100 pF resonate at 555 KC.
Is that right? And if so, what resonant freq would
one use to get the thing to work at 15 MC?
73 DE Dave AB5S
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