>
>
>
>> Yes, Dentron used the Dale resistors ... not a good choice.
>
>Okay...let's replace it.....
>Was 100 ohms a bad choice also for a pair of 8875's?
? Yes. Also, the orig. shunt resistor was wire wound. The cathodes
themselves are c. 27-ohms avg. so a series cathode-resistor is needed to
increase the driving Z of the cathodes. Another circuit improvement is
to add a ultra fast recovery 1a/400v diode in series with the shunt R.
The diode is oriented to prevent current from flowing in the shunt R when
the tubes are conducting. This makes for a more balanced load on the
radio.
>I happen to have a carborundum 72 ohm @ 50 watts....how would that be?
>
? Probably ok provided you pick an appropriate value for the cathode
feedback resistors. I would start with about 40-ohms for each cathode.
later, Phil
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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