Re: [Amps] Plate Bypass Capacitor

["Carl" <km1h@jeremy.mv.com>]

You want as low an impedance as possible at the lowest frequency at the base 
of the choke. Electrolytic capacitors get very upset with RF and many 
commercial amps take shortcuts there with both choke inductance and bypass 
value.

Mouser has .01/6KV disc caps at low cost

Carl
KM1H


----- Original Message ----- 
From: "Vic K2VCO" <vic@rakefet.com>
To: <dhallam@rapidsys.com>
Cc: <amps@contesting.com>; "Manfred Mornhinweg" <manfred@ludens.cl>
Sent: Wednesday, August 05, 2009 10:55 AM
Subject: Re: [Amps] Plate Bypass Capacitor


> David C. Hallam wrote:
>> Manfred,
>>
>> Maybe my nomenclature of plate bypass capacitor is incorrect.  It is
>> capacitor connected to the DC feed end
>
> Ooops, mistake. It IS the bypass capacitor, not the blocking capacitor. 
> Here 0.001 is
> probably too little -- I recommend at least 0.01 and if the amp covers 160 
> meters even
> 0.05 wouldn't be a bad choice.
> -- 
> 73,
> Vic, K2VCO
> Fresno CA
> http://www.qsl.net/k2vco
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