[Hallicrafters] Questions on S-38A Restoration

[Glen Zook]

For matching the signal generator to the S-38A you
might want to use a TV type balun.  The output from
the signal generator is 50 ohms, but the actual
impedance to the receiver is more like 300 ohms. 
Using a TV balun often helps increase the actual
sensitivity of the older receivers when used with a
coaxial fed antenna.

I wrote an article for Electric Radio a couple of
years ago about this and have the text of the article
on both of my websites

http://home.attbi.com/~k9sth

http://home.attbi.com/~zcomco

Glen, K9STH


--- Michael Melland <w9wis at charter.net> wrote:
The manual calls for fabrication of a dummy antenna
(RMA antenna) that you run a sig generator through to
perform the alignment and sensitivity adjustments. 
What purpose is this RMA dummy antenna ?  I have a
HP8640B... why can't I simply feed low level RF into
the antenna connection on the S-38 to tweak things up?

=====
Glen, K9STH

Web sites

http://home.attbi.com/~k9sth
http://home.attbi.com/~zcomco

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