On 3/13/2020 12:34 PM, Richard (Rick) Karlquist wrote:
On 3/12/2020 4:29 PM, Mikek wrote:
I'll stick my neck out and suggest Dallas Lankford's '2 FET amp'.
If anyone has an interest, I have some more files in my computer.
https://www.okdxf.eu/lankford/Hi%20Z%20PPL%20Loop%20And%20Flag%20Arrays.pdf
I
Mikek KF4ITA
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I didn't look at this circuit carefully; Mikek pointed out that
the JFET's are complementary, not in parallel. (Thanks Mikek
for correcting me). I also see that Lankford writes that his circuit is
derived from Trask's circuit. In any event, the following reference by
Chris Trask, N7ZWY gives a bunch of different versions of this circuit.
http://home.earthlink.net/~christrask/Complementary Push-Pull Amplifiers.pdf
Chris points out that this idea goes back to at least 1982.
Rick N6RK
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