>
>
>
>
>> From: measures [mailto:2@vc.net]
>> >
>> Adjusting filament-v is simpler than tuning a tank.
>
>It may be more simple than tuning a tank except that one does not
>need to open the cover to tune a tank. One must open the cover to
>measure filament voltage properly (directly at the filament pins).
>
The 2 RF chokes bring the fil. v. to the test points on the rear panel.
Why must one open the cover if the needed test instrument connections
are on the rear panel?
>> Several models of Henry Radio amplifiers use approx. 6v on
>> 3-500Z/8008 (4.8v) filaments.
>
>It is lousy design but that's not the issue.
Put a rheostat on the fil transformer and the owner can adjust the fil.
to the correct potential whether the electric mains are 200v, 220v, or
250v. Without a means of fil. V adjustment, the owner is SOL. That is
the issue, Mr. Subich. .
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