[AMPS] 4-1000 IDLING CURRENT

[Rich Measures]

>Jon- The 400V plate supply voltage drop doesn't seem extreme.
>Just remember that the 800+ ohms you calculate *is* effectively
>there somewhere. What Bob is seeing is probably related to the
>voltage regulation of the transformer. In addition to any copper 
>losses (winding resistances), there are additional losses that 
>affect regulation. The leakage reactance of the transformer, a
>magnetic parameter, has a big effect on what the overall voltage
>regulation turns out to be. Transformers with lower leakage 
>reactance have better voltage regulation, if I am remembering 
>right. I believe this parameter is usually more important to reg-
>ulation than winding resistance.

According to Peter W. Dahl, in a Hipersil®  transformer, voltage drop is mostly due to winding resistance.  


cheers
Rich...

R. L. Measures, 805-386-3734, AG6K   


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