[Amps] Ferrite-loaded plate choke

[DF3KV]

---- Original Message -----
From: <wc6w at juno.com>
To: <avilaseca at bluewin.ch>; <Amps at contesting.com>
Sent: Sunday, January 09, 2005 7:03 PM
Subject: Re: [Amps] Ferrite-loaded plate choke


>
>
> Hi Angel,
>   Here is a link to an old posting which describes how to use a
"standard" RF choke with 4CX250's.
>
> http://lists.contesting.com/archives/html/Amps/1998-10/msg00480.html
>
>   If you fabricate the entire Pi-L coil from RG-402 then the
effective impedance at the plate choke will be circa 50 ohms.  I am
using this latter method with a pair of 4CX600's in an amp currently
under constuction.

Hi Marv,

How can the effective impedance at the top of the plate choke be 50
Ohms,  when the tube output impedance represents for instance 2 KOhm
at the same connection?

73
Peter