>> >Circulating currents are a function of loaded or operating Q as well as
>VAR
>> >power (or current or voltage if you like and impedances). Even relatively
>> >small tubes can overheat big wires when operating Q is high.
>> >
>> ** True, Tom. but operating Q is designed in.
>
>Operating Q varies with loading and tuning setting, and Q also varies with
>power level becuase the load on the device end of the tank changes.
>
>We may design Q to be a certain value in a certain operating condition on a
>certain frequency, but it is not possible to have anything close to a fixed
>operating Q in the real world.
>
** Surely, Tom, but my Heath SB-220's tank-L has never melted. However,
it has forced cooling air on the tank and the amplifier Carl is working
on does not.
- R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K,
www.vcnet.com/measures.
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