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Re: [Amps] Checking Plate Choke resonance

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Subject: Re: [Amps] Checking Plate Choke resonance
From: "DF3KV" <>
Date: Mon, 12 Oct 2009 15:04:06 +0200
List-post: <">>
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. 


-----Original Message-----
From: [] On 

As a general rule the impedance
of the choke should be about ten times the plate load impedance or more. 

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