[Amps] PASSIVE NEWORK CATHODE INPUT

[Jim Thomson]

Date: Sat, 22 Sep 2018 20:10:49 +0200
From: "Peter Voelpel" <dj7ww at t-online.de>
To: "'Jim Thomson'" <jim.thom at telus.net>, <amps at contesting.com>
Subject: Re: [Amps] PASSIVE NEWORK CATHODE INPUT

<I dont see a reason for it.
<And I make no use of it with my GG amps.
<I dont use a passive input neither with GG amps, only with grid driven
<tetrodes.

<73
<Peter

-----Original Message-----
From: Amps [mailto:amps-bounces at contesting.com] On Behalf Of Jim Thomson


##  You want some flywheel action  with a tuned input..and a passive input
wont provide that. 

..................................................................................................................


####  Ok, so you dont  use  either  a passive input   nor a  pi  input, nor a T input. 
I have not had much luck  driving the cathode directly  when using a SS  xcvr. 
Follow the return  rf current  of the GG  triode tube.  Without a PI input, the
only return is via the braid of the  coax  back to the xcvr, through one of the caps
in the LP filter, then back down the center conductor of the same coax, completing
the loop. 

##  I use what works.   I don’t have any  tube type  xcvrs anymore. 

Jim  VE7RF