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Re: [TenTec] Airpax Breaker Part and Source

To: Bwana Bob <wb2vuf@verizon.net>
Subject: Re: [TenTec] Airpax Breaker Part and Source
From: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Reply-to: geraldj@weather.net, Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Tue, 04 Jan 2011 20:21:40 -0600
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
Almost sure to use audio taper for audio gain. You can emulate an audio 
taper with a linear taper pot by adding a resistor from wiper to ground. 
Usually about the same resistance as the pot resistance gives a decent 

Unless the pot was assembled from parts for the factory job, it won't 
come apart easily to replace only the switch. Probably the power supply 
needs a power relay so the switch has less current to handle, like some 
Collins power supplies are being modified.

The Corsair front panel has to come to get to most anything on the front 
because pots are mounted to the chassis and then a second nut helps hold 
the front panel.

Most every significant pot maker had modular parts like the Centralab 
you remember. IRC for sure, I could dig back in some catalogs and find 
more but it won't help us find parts today.

Any switch that would fit on a pot won't survive carrying the 12 volt 
current though a few have tried that.

73, Jerry, K0CQ

On 1/4/2011 7:50 PM, Bwana Bob wrote:
> No, not trivial to replace. The Corsair front panel has to be removed I
> think. Pots and switches of the correct size and ratings are hard to
> find. I remember years ago, Centralab had modular replacement parts. You
> bought the pot, switch and shaft separately and it all snapped together.
> Very clever. I would like to find a switch module that I could snap onto
> the back of the Corsair RF gain pot. I think that the push-pull switches
> that Ten-Tec used are not as robust as the conventional type.
> By the way, did Ten-Tec use audio or linear taper pots for their volume
> controls?
> 73,
> Bob WB2VUF
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