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Antique Radio Technical Forum
rating of transformer at 2 volt amps

Posted by Doug Criner on 07/03/2009 21:11

The VA rating of the primary winding is essentially the same as the secondary. So, the rated secondary current rating is about 2VA/17V = 110mA. That is terribly puny, and probably not usable for any tube-type radio application that I can think of. Certainly not for two xfmrs back-to-back used as an isolation xfmr - nor even for a B+ supply. I wouldn't even ring your doorbell.

Assuming the turns ratio is 120:17, I don't think it could be used for a tube plate supply, even if the current rating were higher.

I realize you bought these xfmrs surplus, but I'm really wondering about the original application of a 2-VA xfmr. The dinky thermostat xfmr for my furnace is rated 40VA.

How sure are you of the 2-VA rating? I think such a transformer would almost fit in a large thimble.
Doug

::Let me double check the transformer before this goes too far along,I've left out some important information. I believe the output is about 14 or 17 volts, rated at 2 voltamps, input at 120 volts.
::


rating of transformer at 2 volt amps 
Robert 07/03/2009 14:47 
Bob Masse 07/03/2009 15:13 
Doug Criner 07/03/2009 15:22 
Robert 07/03/2009 15:53 
Lewis L 07/03/2009 16:19 
Robert 07/03/2009 16:25 
Lewis L 07/03/2009 17:59 
Doug Criner 07/03/2009 21:11 
Doug Criner 07/03/2009 21:37 
Lewis L 07/04/2009 13:35 
Robert 07/04/2009 20:01 
Doug Criner 07/05/2009 09:38 
Robert 07/05/2009 21:29 
Lewis L 07/05/2009 10:38 
Lewis L 07/05/2009 10:39 
Edd 07/05/2009 13:17 
Doug Criner 07/05/2009 14:52 
Lewis L 07/05/2009 18:58 
Lewis L 07/05/2009 19:58 
Lewis L 07/05/2009 19:58 
Lewis L 07/05/2009 20:01 
Radiodoc 07/09/2009 22:17 
Lewis L 07/10/2009 10:41 
Lewis L 07/10/2009 11:16 
Doug Criner 07/10/2009 16:41 
Radiodoc 07/10/2009 16:46 

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