On Jan 23, 2005, at 10:30 PM, W3FPR - Don Wilhelm wrote:
For a source of decent audio transformers for low power applications
like that, look at defunct computer modem cards. I have salvaged
transformers from them for computer to audio equipment isolation for
some time now - small and quite inexpensive (i.e. 'cheap', 'free',
etc.)
I'll second this. In fact, if you can find an older Hayes modem, like
one of the 2400 bps full-sized modems -- the transformers are very high
quality. They are physically large, about 3cm on a side and 1cm high
(for through-hole board mounting). Hayes persisted in using these large
transformers for years because they provided a low-distortion coupling
to the phone line.
Some of the teeny 1cm cube transformers you find in cheap modems aren't
nearly as nice, but will work as well.
Bill Coleman, AA4LR, PP-ASEL Mail: [EMAIL PROTECTED]
Quote: "Not within a thousand years will man ever fly!"
-- Wilbur Wright, 1901
_______________________________________________
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
