|The day ended with a Steampunked Skyriter|
I generally always have a few pulls and some duds on the workbench so I decided to be silly and rather than only use one small tube I would power a Skyriter by RCA and Sylvania.
The small tube on the left will do 250 watts easily it is a 4CX250B and used in many FM transmitters and many otherapplications. The big one, a 5762 is nearly obsolete and used in old RCA and Gates AM 1000 watt and 5000 watt transmitters. 2 or 4 tubes are used. The tube on the right is a 4X500A and will do 500 watts and was pulled from the exciter of an old RCA TV transmitter. The miniature tube sitting on the heat sink of the big tube is an example of the many tubes used in portable gear used well into the 50s. Many are still in use although they are obsolete.