[Amps] Rm resistor

[Steve Thompson]

On Tuesday 14 December 2004 12:11, you wrote:
> This applies to grid-driven Class AB1 amplifiers when they are being
> neutralized, but not to g-g Class AB2 amplifiers.

The question was whether a midpoint resistor was needed when tuning a PI-L 
network - surely it isn't whatever the amplifier configuration.

Steve

>
> On Dec 14, 2004, at 1:16 AM, Steve Thompson wrote:
> > On Monday 13 December 2004 20:26, Luca wrote:
> >> Hi All
> >>
> >> For the Pi or PiL  adjustaiment whit the swr analyzer ,it's necessary
> >> to
> >> place  a non-inductive resistor egual to the plate impedance,from the
> >> anode
> >> tube and the chassis ground. I would like to know if in the PiL case
> >> ,for
> >> the best result, it's necessary to place also the non-inductive
> >> resistor
> >> egual to RM value ,for example 300 ohm, from the load variable
> >> capacitor to
> >> the chassis ground.
> >
> > No. The resistor from the anode to ground is the only one you need.
> >
> > Steve
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> Richard L. Measures, AG6K, 805.386.3734.  www.somis.org