ORIGINAL MESSAGE: On Sun, 14 Mar 2010 15:51:23 -0400, "Carl" <km1h at jeremy.mv.com> wrote: > >Whats the external grid Q when they are tied directly to ground? REPLY: The Q is determined by the cathode to grid impedance. When the grid is grounded, you can think of it as simply the cathode to ground impedance. 73, Bill W6WRT