Thanks, Andy
I understand your IP and trade-secret issues. That's an interesting
approach. I'll have to give it some thought, although I don't expect to be
building preamps anytime in the foreseeable future. Was just curious why so
many J-310/309. Now I understand.
Have a good afternoon!
73,
Charlie, K4OTV
-----Original Message-----
From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of Andy Ikin
Sent: Monday, August 26, 2013 6:29 AM
To: Charlie Cunningham
Cc: Topband Reflector
Subject: Re: Topband: Anyone have a boat load of J-310s?
Charlie wrote on Aug. 26.
"Your preamp sounds very interesting! It must be fairly elaborate, if it
uses 8 of the J309 FETS! I'd be interested in the circuit!"
Charlie, I don't disclose circuit diagrams for commercial reasons. However
the design is a push-pull using 4 fets in parallel to increase the gm and
reduce the channel resistance, hence lower the noise.
73
Andrew G8LUG
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