[Amps] Old Transmitter designs (was cathode driven/groundedgrid magic revealed.)

Gary Schafer garyschafer at comcast.net
Wed Jul 22 20:04:59 PDT 2009



> -----Original Message-----
> From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
> Behalf Of Bill, W6WRT
> Sent: Wednesday, July 22, 2009 7:00 PM
> To: Ham-amps
> Subject: Re: [Amps] Old Transmitter designs (was cathode
> driven/groundedgrid magic revealed.)
> 
> ORIGINAL MESSAGE:
> 
> On Wed, 22 Jul 2009 18:44:53 -0400, Herzog <herzog at frontiernet.net> wrote:
> 
> >
> >  It is recommended that the driver stage be heavily swamped to
> >avoid such load variations.
> 
> REPLY:
> 
> Very poor advice. A far better method is to provide a resonant circuit in
> the
> input to provide a "flywheel" effect.
> 
> And as I said before, even that is only needed if the tube is biased and
> driven
> so that it draws grid current.
> 
> 73, Bill W6WRT

You disagree with Bill Orr?

73
Gary  K4FMX




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