I may be wrong on the wire size try #28. The bottom 1/3 of the choke was
close wound if I remember. Try the calculation for 90 uH to check yourself.
I'm working from memory here.
We agree it needs to be about double the inductance of the 800 which is 90
UH
-----Original Message-----
From: Harold B. Mandel [mailto:ka1xo@juno.com]
Sent: Wednesday, April 13, 2005 1:52 PM
To: philc@texascellnet.com
Cc: amps@contesting.com
Subject: Re: [Amps] B&W plate choke
A 200uH choke (for 1.8MHz RFC applications),
using 26AWG magnet wire will require 445 turns
with close spacing and this will occupy 14.1 inches
of form at an inner diameter of 0.750 inches.
On Wed, 13 Apr 2005 12:18:04 -0500 "Phil Clements"
<philc@texascellnet.com> writes:
> How can the 802 be 200 uh? It only has about 10 more turns on it than
> the 800 does.
> 800 is 90 UH and the 802 is 200 UH. #26 wire if I remember. I've
> used both > hanging off a 4-1000A. You need the 802 for 160 meters. The
> 800 is resonant around 25 MHz.
>
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