-- "DF3KV" <df3kv@aol.com> wrote:
<snip>
> 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
Hi Peter,
The "plate" choke is connected to the "output" (center conductor of the coil)
of the pi-net which will be transformed to a low impedance as is the antenna
connection.
It may be easier to visualize if you draw the circuit as described in the old
link.
73 & Good morning,
Marv WC6W
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