[AMRadio] Re: AM Audio

Geoff w5omr at satx.rr.com
Sun Aug 21 17:54:22 EDT 2005

Patrick Jankowiak wrote:

> Geoff,
> That is a beautiful rig, with those plates all a-glow!
> Patrick
>> http://w5omr.shacknet.nu:81/~w5omr/hamstuff/AM-Stuff/Titanic/modulator/new_titanic.jpg 

Thanks, Pat..

Hey, do some calculating...  That's -70V bias on the 250TH's, resting at 
100mA of idle current.

Yes, the rig is -on the air- in that shot... 

That's also about 300mA on the final, and the final is running around 
1500vdc at that time, I think...

regardless, for 250TH's with -70v of bias, to have 'em rest at 100mA... 
how much plate voltage do you think was on the modulators, at that time?

73 = Best Regards,

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