In message <4f669a4d.3010...@lazygranch.com>, gary writes:
>DC in a transformer raises the low frequency corner a bit. Obviously not
>a problem in your case.
I just double-checked, because that rang a bell. I did reinstate
the capacitors as 2.2uF films in the final article for exactly that
reason.
As for gain, I have never missed any, I get a good healthy signal,
even though I do live in the middle of a pop 30k city.
>I should point out that every active device Lankford puts in the signal
>chain [...]
Why are you talking about Lankford at this point ?
What I built was Fig 5 from this:
http://home.earthlink.net/~christrask/Complementary%20Push-Pull%20Amplifiers.pdf
I realize that Chris Trask started out from Lankfords design, but I don't
think it is fair to attribute the Fig 5 schematic to Lankford any more.
There's a picture of my implementation here:
http://phk.freebsd.dk/misc/ChrisTraskAntenna.jpg
I feed it 15 volts on the twinax pair, pull that out of the toroids
centertap, regulated it with a 12V 3-terminal.
You can see the prototype in the top right corner.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
p...@freebsd.org | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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