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 ...

Kennington Tube Station have implemented the UK’s largest silent hybrid smart grid, manufactured by Off Grid Energy. The portable hybrid battery storage installation, named gridtogo, possesses a power ...

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.