[Amps] Re: matching network

[gdaught6 at stanford.edu]

On 27 Jan 2004 at 19:27, R.Measures wrote:

< snip >

> >Both grids need to be grounded to RF... but they don't *have* to be
> >both connected directly to chassis.
> 
> **  which means?

I'm pretty sure Ian means that both grids need to be bypassed to 
ground, if you're going to drive the cathode.  

But I think Rich and Ian (and I) agree that doing a "grounded-grid" 
amplifier using one of these tetrodes is a rather silly way to build 
the amp, especially if it requires conversion from a grid-driven 
configuration!  Use normal operating voltages on the screen (bypassed 
to ground) and on the control grid (fed through an RFC) and drive the 
control grid with a suitable non-inductive resistor as a non-reactive 
load for the exciter.  Published examples abound!

73,

George T. Daughters, K6GT