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/sci/ - Science & Math

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3241339 No.3241339 [Reply] [Original]

I'm building a linear amplifier with 3 4-400a tubes, but I haven't got anything near an adequate filament transformer for supplying 5 volts at 14.5 amps X 3 tubes.

My question is, can dynamotors be run in reverse operation? I have a couple that take 5.8 volts DC at 30 some amps and output 420 volts DC at some insignificant current. And it would be easy enough to regulate the DC to 5 volts exactly.

Can I run the filaments off the dynamotors and the dynamotors off 420 volts DC?

>> No.3241363
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3241363

self-bump with horrible fork-lift mishaps

>> No.3241383
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3241383

surely someone besides me on this board would have this kind of esoteric knowledge.

>> No.3241414
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3241414

/sci/ i am disappoint

>> No.3241553

Do you have a dynamotor? then test it! otherwise rip a filament trafo from an old crapped commercial valve radio. -of interest what is the amplifier for? HAM or hifi?