[AMRadio] Re - response to input to screen grid amplifier

Gary Schafer garyschafer at comcast.net
Tue May 23 20:16:01 EDT 2006

This sounds like a class C linear screen driven amp. I couldn't find the
article on it but W9VMQ built such an amp using 6DQ5's in the early 60's. I
think he also did some experimenting with the 813 also. I think the article
was in Ham Radio magazine. Maybe someone can do a search for it. Probably
around 1963 to 1965? 

Gary  K4FMX

> -----Original Message-----
> From: amradio-bounces at mailman.qth.net [mailto:amradio-
> bounces at mailman.qth.net] On Behalf Of John E. Coleman (ARS WA5BXO)
> Sent: Tuesday, May 23, 2006 7:34 PM
> To: 'Discussion of AM Radio'
> Subject: RE: [AMRadio] Re - response to input to screen grid amplifier
> Bill does the screen have a DC path to ground through the tuning coil?  I
> see no way that you can have grid current with no RF on the Grid.  Perhaps
> there is a hidden wire connecting the grid and the screen together.
> I am sending you a PDF on the 813 just to make sure that you have a
> correct
> one.
> John, WA5BXO
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