[AMPS] Re: G2DAF

[measures]

>Gents.
>
>If the 813 in question is drawing grid current,perhaps it's actually
>running in class AB2.     In GG, it would be in AB2.   In G2DAF, I doubt
>it's AB1.
>
agreed

>.......
>-You might want to look at the bit on Ian White's Webpage re: screen
>regulation.   ' IMD-effect of screen supply stabilization'   GW4FRX
>designed the screen supply.
>
>-They managed to improve a pair of  4CX-250R's from -20 to  -30 for IMD,
>just by going from series zeners to new design.

The zener string must have been defective.  As Norm's amplifier 
demonstrated, going from -30db to -22db would necessitate a totally 
unregulated 0v-350v screen potential plus plenty of grid current.  
Getting down to -20db is awesome. .  BTW, the all-time record for my 
voice distortion measurements is -9db.  
>
later, Jim

-  Rich..., 805.386.3734, www.vcnet.com/measures.  


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