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Old 30th March 2011, 09:04 PM   #1
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Default Where to find Dual Pots with Switches

I'm looking for a dual gang audio taper pots with a rotary switch on the third deck. These were once very common and were used on vintage stereo amps like those made by The Fisher and HH Scott with their ubiquitous "on/off/volume" knobs. NOS items can occasional be had but are usually a little too expensive, generally over $50.

Some manufacturers like Alpha show the switch option in their catalogs, but the supply houses like Mouser et al don't carry them. They seem nearly impossible to find today from new sources. Does any one know where to source these "off the shelf"?

Last edited by Captn Dave; 30th March 2011 at 09:06 PM.
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Old 31st March 2011, 01:27 AM   #2
Enzo is offline Enzo  United States
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OEMs order pots to specification. Alps, ALpha, whoever will show all sorts of options. You order whatever features you want and they make the parts for you. They don;t have them sitting around already. Especially something esoteric like a dual pot of some value plus a power switch. Companies like Mouser will stock a few very basic generic pots from them.
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Old 31st March 2011, 02:42 PM   #3
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I'm in a similar boat right now, although the pot I need is nothing fancy (slide-type, 5K x 2, audio taper). It looks like the "usual suspects" (digikey, mouser, newark) don't have these in stock.

It would be nice to have a list of places that normally carry a decent inventory of this kind of stuff...
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Old 31st March 2011, 05:04 PM   #4
Fenris is offline Fenris  United States
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I just ordered two Alps from Mouser, dual 20K audio w/ switch. They're PC mount instead of solder tab and are fairly small, but they have panel mount hardware.

RK0971221Z11 ALPS Potentiometers

Look at the data sheet for details, the Mouser description isn't very complete.
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Old 31st March 2011, 05:32 PM   #5
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Nice find. I note that the switch is rated for 3A at 16V. I doubt that it would hold up at 120VAC and say 1.5 amp.

Enzo makes the point that you can get anything you like in quantity. The next best thing to ordering in quantity would be to find an OEM using the pot you covet that would sell it from their parts desk at a fair price. I just cant think of anyone using switched pots these days. For good reason.
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Old 31st March 2011, 06:27 PM   #6
Fenris is offline Fenris  United States
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The switch can be used for a relay or soft-start or standby type switch. I'm sure I would be more comfortable with that than with 120vac at several amps running that close to my low level signal (and hand). A tiny switchmode 5v, 100ma power supply would be fine for this and still only have a small amount of "vampire" power usage while being dirt cheap.
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Old 31st March 2011, 08:33 PM   #7
Trebla is offline Trebla  United Kingdom
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RS Components do some Tyco dual log pots with a switch. 2amp at 250v i think.

http://uk.rs-online.com/web/0168392.html

Last edited by Trebla; 31st March 2011 at 08:38 PM.
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Old 1st April 2011, 02:28 PM   #8
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Quote:
Originally Posted by Trebla View Post
RS Components do some Tyco dual log pots with a switch. 2amp at 250v i think.

Tyco Electronics | Passives | Resistors | Trimmers, Potentiometer and Rheostat | Carbon Track |1624213-2
Thanks for the link. I checked their catalog. The P/N starting with 27 are dual and the A,B and D suffix are the various switches. The N is no switch. All of their 27 pots end in N which indicates that their switched pots are all single. That is what I'm finding at alpha and others.

Last edited by Captn Dave; 1st April 2011 at 02:37 PM.
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