Running a reference voltage in a regulated tube PSU!
This was chosen to replace the wrong replacement transformer in a 1000mA 0-600 volt Sorensen Nobatron power supply, commissioned by Raytheon for testing components in RADAR sets. The 250-0-250 barely gave me 320 volts. Now I have a full 600 volts DC that is rock steady. I needed a 240 volt tap to elevate the heater supplies, but we tacked in a separate 120-240 and it's chugging away. We even tapped the prerectifier output and doubled it for 450mA, regulated that with an 1156-800-0-800-1156 transformer, and high voltage FETs. This gives us up to 1.5KV @ 400 mA!!! I have US Navy transformers arranged in a series parallel bank now for 1 or 2 amps at either 3KV or 6KV, unregulated for RF testing, but the Nobatron only weighs 90 pounds. The RF power supply weighs in at a quarter ton! This PT has also been used for a few guitar amp projects. The weirder the better! Eight 6973 tubes? A pair of German EL156s? KT7s? TT21s? 6146Bs? I even used one to power ham radio stuff, like an old Drake transmitter, or various Heathkit models, sold without their original PSUs. I usually wind up going to a 500-0-500, or better. Sadly when grandpa dies, no one realizes that heavy box went with his ham radio. It goes to the dump and the radio goes to Goodwill.
11/18/2017 10:59 PM
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