[Amps] Checking Plate Choke resonance

[Bill, W6WRT]

ORIGINAL MESSAGE:

On Mon, 12 Oct 2009 15:04:06 +0200, "DF3KV" <df3kv at t-online.de> wrote:

>I have never seen such high impedances at amplifier chokes.
>Most of the chokes in ham radio amps are not even twice the plate load.
>The famous Rfparts 225µH transmitting choke is just 2,5k ohms on 160m.
>Much smaller chokes are used in commercial amplifiers. 

REPLY:

You are right, I mis-spoke. I should have said ten times the reactance of the
plate tune cap, not times the plate load impedance. 

Sorry. Need more coffee.  :-)

73, Bill W6WRT