So far I've been only able to find an article from Ham Radio, December, = 1988. I also know there were others. There construction was buried most of the time in articles pertaining to = receiver, transmitters, and vfo's. Looking for more. Many magazines here. Regards, Helm. WB2ADT --- StripMime Report -- processed MIME parts --- multipart/alternative text/plain (text body -- kept) text/html ---