We have a lot of off grid design features in our house. One of those is solar tubes. Since they seem to generate so much interest with visitors I thought I would share what I know about them after ...

Richardson Electronics has announced the availability of the latest edition of the Care & Feeding of Power Grid Tubes handbook for all of its customers free from stock. The handbook, published by the ...

A plastic base with 7-pins, domed envelope. Donor’s card reads: “Triple grid power amplifier tube made by Sylvania Corp. for use in the audio output stage of power amplifiers and radio receivers.