...OK guys! Just please remember: the RF current at the choke's base can be
quite high, so RF withstanding current must be quite high!
Apart from that, it's better to use different kinds of capacitor in
parallel, rather than one alone, except if it is made especially for high
current duty: one value in the tens of nanofarads for the very low
frequencies, one or two ceramic units for the higher frequencies. I measured
RF currents in the Ampere range on a 1200W PEP amplifier.
Alex 4Z5KS
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of Russ Williams
Sent: Monday, January 12, 2009 7:06 PM
To: Jim W7RY; amps@contesting.com; k7fm
Subject: Re: [Amps] plate bypass caps
Ooops; I mis-read as blocking caps. Oh well. Yes, they will be fine at the
base of the plate choke; I use similar caps in my projects but use good
doorknobs for blocking caps.
Thanks.
Russ
--- On Mon, 1/12/09, k7fm <k7fm@teleport.com> wrote:
> From: k7fm <k7fm@teleport.com>
> Subject: Re: [Amps] plate bypass caps
> To: "Jim W7RY" <w7ry@arrl.net>, hrd998cc@yahoo.com, amps@contesting.com
> Date: Monday, January 12, 2009, 6:06 AM
> :There is no RF current (or very little) to speak of at the
> BASE (cold RF end) of the plate choke."
>
> And, two in parallel handle twice as much rf current as
> one, in any event.
>
> 73, Colin K7FM
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