Tube DIY Asylum

tube power transformer B+ amperage

172.249.155.98

tubeflash

I have a power transformer with an unknown B+ amperage rating.can an approximation be derived from knowing the voltage (425-0-425 vac)
and the resistance of the windings (55 ohms and 54 ohms)from
center tap to each B+ tap . any help would be appreciated.

Follow Ups:

RE: tube power transformer B+ amperage - pmaneri@samsontech.com 12:40:04 06/24/16 (0)
Tubeflash - I have often wondered about this too. So, I discussed with Edcor transformers and they said, you have to load down the secondary until the voltage drops by 10%. The current being drawn at that time should be the rated current. - Pete
RE: tube power transformer B+ amperage - BofService 12:01:13 05/14/16 (0)
The Hammond 279X is speced at 850v, resistance end to end is 95 ohms. The transformer is rated for 173ma.
- http://www.hammondmfg.com/pdf/EDB279X.pdf (Open in New Window)
RE: tube power transformer B+ amperage - hennfarm 18:46:26 05/13/16 (0)
How much does the transformer weigh? Do you know what it was pulled from? My guess is 150ma. JH

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