[AMRadio] Modulator question


Paul Baldock paul at paulbaldock.com
Sun Jan 31 01:12:59 EST 2016


At 09:15 PM 1/30/2016, Jim Candela wrote:
>power. Perhaps try bypassing the screen tap with a bypass capacitor, 
>like 50 mfd or so.

It's bipased with 390uF



>    How are you biasing those tubes? Is this class Ab1

AB1., with adjustable bias set at 25mA per tube quiescent.


>    Another factor is plate to plate load impedance.

I am matching the impedance correctly



>   Does the plate voltage droop much as you crank up the power?

maybe 30V in 660V

More experimenting tomorrow !!


Thanks

- Paul



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