[AMRadio] Max power off from plate current dip problem 32v1...

Larry Szendrei ne1s at netzero.net
Thu Jun 27 01:04:35 EDT 2002


I concur with Steve - Most if not all my tube transmitters show max.
power out off the plate current minimum. I wouldn't lose any sleep over
it, but if the final is taking off on its own, something (such as
neutralization, if that's the cause) needs to be done.

I remember reading somewhere that the screen current minimum is a better
indication of resonance than the plate current minimum in a tetrode
calss-C amp - that would seem to imply that the plate current dip will
-not- coincide with max output for this case.

73,
-Larry/NE1S

W2ZR at aol.com wrote:
> 
>         <mailto:amradio-request at mailman.qth.net?subject=unsubscribe>
> List-Archive: <http://mailman.qth.net/pipermail/amradio/>
> Date: Mon, 24 Jun 2002 20:09:43 EDT
> 
> Hi,
>        I don't think I've ever tuned a rig where maximum output occurred at
> the same point as the plate current dip.
> 
> 73,
> Steve W2ZR
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