[Amps] AL-1200 plate circuit conductor source/substitute?

[Jim W7RY]

Save yourself some time a trouble. Buy a new choke from Ameritron/MFJ or RF 
Parts. There only $25.00.  They are would with an odd conductor size. I 
tried to re-wind one and  could not get the resonance where I wanted it.

73
Jim W7RY



-----Original Message----- 
From: Brian Moran
Sent: Thursday, October 11, 2012 8:26 AM
To: amps at lists.contesting.com
Subject: [Amps] AL-1200 plate circuit conductor source/substitute?

Hi folks! My AL-1200 converted to gs35b amp had a failure recently on 10m; I 
don't know the exact details since someone else was using it on 10m, but 
after inspection, it appears that the plate choke arced and de-spooled (THAT 
must have been exciting), and one of 'strap conductors' connecting the band 
switch to the top of the loading variable also has a section that failed 
(yikes). The person using it at the time (on 10m RTTY) says there were two 
noisy events, I would suspect the conductor to the loading variable failed 
first, then the plate choke.

I'm going through the whole thing and will pay particular attention to the 
T/R relay, resonance of the plate choke after I rewind it, etc.  I'm 
planning on using #24 or #26 wire for the choke; I have neither lying 
around, so whichever I find first :-)

What's a good source or substitute for the flat silver-coated-copper 
(assumption) ribbon conductor being used for the bandswitch to loading C? I 
appreciate the 'fusing' quality, as the band switch appears spared.

-Brian N9ADG
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