I tried that choke in my 3x 4-400 amplifier, it immediately went up in smoke
on 17m.
73
Peter, DJ7WW
-----Original Message-----
From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Jim Thomson
Sent: Montag, 10. Dezember 2018 10:24
To: amps@contesting.com
Subject: [Amps] High temp magnet wire?
Date: Fri, 07 Dec 2018 19:21:02 +0000
From: Manfred Mornhinweg <manfred@ludens.cl>
To: amps@contesting.com
Subject: Re: [Amps] High temp magnet wire?
> JI depicts some sky high Z
> numbers, etc, when he tested that choke with his VNA.... on all 9 x
> bands.
<<<Would like to see that. Is it piblished somewhere?
<Manfred
### https://www.w8ji.com/rf_plate_choke.htm Excellent writeup.
Scroll to the bottom to see his VNA results. For choke dissipation
he is using RMS voltage squared / RP. RMS RF voltage = 60% of
loaded B+.
## Note, that graph at the bottom is NOT the currently produced choke
that
Ameritron uses... which btw, is the same one sold by RF parts. Its also
the same choke
used in the current crop of alpha amps. The choke depicted in the graph
resonates on
12.1 mhz and 15.7 mhz. The current production choke resonates on 12.5
mhz..and 27.1 mhz.
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