[Heathkit] HW-101

[Ronald Erickson]

There are a number of things that can be done to slow to eliminate VFO
drift.  The way with the Swan rigs is in the Ham Radio Magazine of I believe
around 1979.  The way in the Johnson Valiant ll was to use a series
capacitor to slow drift with variable adjustment. In my R4C I used a
diode/zener voltage reference combination plus electronic DC power supply.
 I think the way I am going to do it in the future is to get a modern
synthesizer for around a hundred dollars for my boat anchors as it is too
much trouble and expense to do otherwise for me.

73,

Ron, K0IC

On Wed, Oct 27, 2010 at 7:33 PM, Don Cunningham <wb5hak at martineer.net>wrote:

> Hi, Bill!
> When you cure the drift on your HW101, I'll send you my VFO's from the
> SB401/303 pair and the SB-104A I have, hi hi.  That's just part of the
> charm
> of these old rigs, I'm afraid, is the drift.  A good cleaning and re-lubing
> MIGHT help, but it's a LOT of work, and I haven't found the energy yet.  On
> the SB-104A, the VFO "jumps" around a bit, so I bought a "spare" and will
> rebuild it and put the spare in to fix that.  I'll let you know how much of
> a pain that is!!  Welcome to the Heathkit list.  It will be noisier when it
> gets colder.  Where are you in "5" land??  I am near Duncan, OK.
> 73,
> Don, WB5HAK
>
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Ronald D. Erickson, K0IC
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