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Re: [Amps] AL-1200 Tuning Capacitor Range

To: "<>" <>
Subject: Re: [Amps] AL-1200 Tuning Capacitor Range
From: Kim Elmore <>
Date: Sat, 18 Oct 2014 07:15:35 -0500
List-post: <">>
Thanks, both. Had I given this more than passing thought at 11 PM, the answer 
would have obvious!

Next chance I have, I'll see if I can spread out the turns a bit. I can't get 
the cover off where it sits and  It's a heavy beast so not much fun to move 

Kim N5OP

"People that make music together cannot be enemies, at least as long as the 
music lasts." -- Paul Hindemith

> On Oct 18, 2014, at 0:05, "Dave Hachadorian" <> wrote:
> Reduce the inductance.  This is usually most easily done by spreading out the 
> turns on the 21 MHz coil.
> Dave Hachadorian, K6LL
> Yuma, AZ
> -----Original Message----- From: Kim Elmore
> Sent: Friday, October 17, 2014 9:43 PM
> To:
> Subject: [Amps] AL-1200 Tuning Capacitor Range
> I have an AL-1200 that works very well using the 3CX1200A7 tube, but at
> the bottom end of 15 m the plate tune capacitor needs to be almost
> completely unmeshed for proper tuning. The load control is not near
> either extreme. I'm not completely convinced the PA is properly tuned; I
> figure this one has just a wee bit more stray capacitance. Would moving
> the 15 m tap one turn help this? If so, which way should I go: remove a
> turn or add a turn of inductance?
> Kim N5OP
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