[Elecraft] OT - Ham IV position pot repair

[Dr. William J. Schmidt]

This company says they have them:

https://www.techhamshop.com/hygain-hy-gain-rpm-1-rotator-pot-500-ohm-h4-t2x-cd/



Dr. William J. Schmidt - K9HZ J62K(J68HZ) 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ

Owner - Operator
Big Signal Ranch – K9ZC
Staunton, Illinois

Owner – Operator
Villa Grand Piton – J68HZ
Soufriere, St. Lucia W.I.
Rent it: www.VillaGrandPiton.com

Moderator: North American QRO Group at Groups.IO.
Moderator: Amateur Radio Builders Group at Groups.IO.
President – Walt Johler Memorial Amateur Radio Club – W9FD.

email:  bill at wjschmidt.com


-----Original Message-----
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On Behalf Of john simmons via Elecraft
Sent: Wednesday, September 3, 2025 2:59 PM
To: Kevin McQuiggin <mcquiggi at sfu.ca>
Cc: elecraft at mailman.qth.net
Subject: Re: [Elecraft] OT - Ham IV position pot repair

I'm not aware of any vendor for the wirewound pot since MFJ sold all their stock. I would like to know if there is another vendor. I replaced one in a T2X with a part from MFJ to cure erratic readings without success. -de NI0K

-John
________________________________
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> on behalf of Kevin McQuiggin via Elecraft <elecraft at mailman.qth.net>
Sent: Wednesday, September 3, 2025 9:59:05 AM
To: Andy Durbin <a.durbin at msn.com>
Cc: elecraft at mailman.qth.net <elecraft at mailman.qth.net>
Subject: Re: [Elecraft] OT - Ham IV position pot repair

Hi Andy:

I bought a new pot assembly that is a drop-in replacement in the rotator.  That was way easier than redoing the winding.  I forget the name of the place, but there is an online shop that sells them.  The new one worked perfectly and has been in service for 4+ years.

73,

Kevin VE7ZD/KN7Q


> On Sep 3, 2025, at 10:43 AM, Andy Durbin via Elecraft <elecraft at mailman.qth.net> wrote:
>
> Lots of very experienced people here.  Has anyone attempted to rewind the position sensing potentiometer of a Ham IV rotator.  It looks as though it should be possible if the characteristics of the resistance wire were known.
>
> Of course it would be far easier to buy a new potentiometer but they are no longer available.
>
> Thanks and 73,
> Andy, k3wyc
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