This is a one valve [tube] radio that believe it or not I constructed 48 years ago. It remained lost but was discovered again during a recent house move. The valve used is a battery R.F. pentode dating from around 1948 on a B7G base. The type number is DF91 or the American equivalent, the 1T4....

This is a slide show overview prepared by Scotty showing his work with converting PC Power supplies to ham radio use presented at the August 2007 FSARC meeting.

This Video is from the world of amateur radio. It is a story about RQ54L quad antenna installation on a rural position of RA9FTM radiostation

During the European Triode Festival 2006 (ETF06) the 100th anniversary of the Triode was celebrated. To honor this Triode Centennial, a copy of the DeForest Audion (the first triode) was made. This video documents the making of the ETF06 Triode.

installation of new antenna and 7/8 hardline on top of co-op

What is Hellschreiber. Hellschreiber is a German name, meaning "bright writing", or "clear writing". Hellschreiber is anything but a new mode. It was first patented in 1929 which makes it the oldest machine generated data transmission mode used in amateur radio. To put this in perspective, SSB...