• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

transformer spec

skipper

Member
2007-04-18 3:01 am
Hi All,

I am a newbie and I am going to build the "El Cheapo" amp. I have a couple of these transformers and was wondering if they would work for any part of a tube amp. I believe the tube filament heaters transformers are usually about 12v correct? This transformer will do 24v, please check out the specs and see if I can use them.

Thanks
René
 

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Big 12/24V Transformer

There are two 12V secondaries rated at 5.4A each. These could be used to supply filaments in a big amplifier. Most tubes have 6.3V filaments, so putting two in series (of the same current rating!) would allow you to use the 12V winding. The fact that the primary is rated at 115V and most American power is closer to 120V would bring the output voltage up some, which is good in this case.

- John Atwood