"Win" wrote in message
...
I am interested in installing a vaccum relay QSK circuit in a SB220.
If anyone could copy for me, the article, and provide me with it, in
the December 1990 QST, I would be forever gratefull, and would pay any
cost.

Either e-mail attachments or USPS would work for me.

Win, W0LZ

Win,

What you are asking for are the QST articles authored by Rick Measures.
"Circuit Improvements for the Heath SB-220 Amplifier" (Rick's updated
manuscript (2001) for Nov.-Dec., 1990 QST article).
http://www.somis.org/SB220ci.html

Rick has these on his web site, he
http://www.somis.org/

gb