[Amps] Plate RF choke
km1h at jeremy.mv.com
Sun Jan 27 21:58:30 EST 2013
Have you tried Palstar, it is much shorter?
----- Original Message -----
From: "rick darwicki" <n6pe at yahoo.com>
To: "AMPS" <amps at contesting.com>
Sent: Saturday, January 26, 2013 1:21 PM
Subject: [Amps] Plate RF choke
I continue to have problems with limited space for an Ameritron RFC in my
Alpha 76. It arcs to the old style long capacitor.
Working on an old HT-41 I noticed it has a smaller diameter multi-pi layer
RFC with sort of twisted wiring in the layers. I haven't measured it yet but
I assume it would'nt have much self resonance in the ham or WARC bands. It
appears to be more than the 190uh or so I might need for the Alpha. The
HT-41 was rated at about 500ma max plate current.
Considering swapping the RFC's but worried about the current, any comments?
Also, the Alpha is a 3 holer and could draw as much as 1200 ma. I can rewind
a burned Ameritron choke and get the self resonances further away from
operating points. Question is what is the minimum size wire I should use in
the choke. I know it isn't the DC current listed in wire tables, but have no
idea how small I can go.
Talk is cheap... except when Congress does it.
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