Allen Bradley used to make "Mod Pots". Didn't some one else pick up this line after they stopped? What value/s do you need? I have some new old stock.
Chuck P.
Allen Bradley used to make "Mod Pots". Didn't some one else pick up this line after they stopped? What value/s do you need? I have some new old stock.
Chuck P.
The old electronic parts catalogs used to have stackable components for adding pots (and switches) in almost any configuration, but I haven't seen 'em for quite a few years.
If any suppliers still make those components, I suppose the vintage/tube equipment repair/restoration folks would know.
-- Cheers, WB .............
If you can tolerate non-standard then scrapped analogue car radios are a good source of modular ganged pots that often come apart easily. If you can tolerate bad movement , limited wear allowance, standard size presets will often take an oval shaped shaft through a number ganged together. Maybe look into improving/replacing the trotation bearing surfaces
The were made by Centralab, which is a long gone brand. The were called: 'Centralab Fastatch II Build A Pot' I have a few parts left, but not the catalog that told you what worked with what, and the BOM for various OEM pots.
You don't want to use one of those for anything more than two gang. They were already flimsy feeling at two stage. They were expensive and hard to get, when they were in production.
-- You can't fix stupid. You can't even put a Band-Aid? on it, because it's Teflon coated.
Please Google for "modular potentiometer" and you'll find that Cermet, Vishay, Alpha (Taiwan), and probably some others, make them. For example:
On the other foot, I have had considerable difficulties with such ganged pots in various pieces of equipment. I have several Radio Shock scanners with them, that are worn out and have "dead" spots. My ancient Wavetek 3000B service monitor many of these that are all intermittent. I've had limited success drilling a tiny hole in the side, and injecting contact cleaner.
-- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com
een
e .When I saw triple ganged pots (not modular) back in the day, they were always T-pads. I wonder if pots with 10K elements from the same product line could be cannibalized to turn a T-pad into what the op wanted.
Where the track is not too bad , just worn in arcs. Bend, out or in, whichever direction has most fresh track, the wiper blade/blades, to use a different part of track. If the wiper support can be wedged away from the track then bend the wiper to give more contact force. If limited access then 2 needle points one about where the wiper starts to bend and then at the wiper/s themselved , on the other side and against one another force in some more wiper tension. To do this with dual pots , usually the central one is not acessible. With a Dremmel and .5mm grinding disc, cut 2 or 3 slots in the screening can , enough to bend outwards and gain some space. Bend back afterwards and glue over the cuts. If the rivets have slackened on the paxolin then squash with an old pair of basic red/blue/yellow single action crimp pliers. To get to the wiper rivet grind down the the interfering bulges a bit between the red and blue sections of the crimp tool.
Doubtful. 'T' and 'L' pads were wirewound, and most were built to handle more power than the common 1/2 Watt pot used in other circuits. That made the bodies larger, and wirewound elements aren't interchangeable with carbon.
-- You can't fix stupid. You can't even put a Band-Aid? on it, because it's Teflon coated.
On 5/1/2011 12:28 AM N_Cook spake thus:
[bodgering drivel snipped]Norm--remind me again to never, ever bring any piece of equipment into your shop!
-- The current state of literacy in our advanced civilization: yo
the
against
the
Thats the nice thing about freedom of choice. You can go to the shop down the road from me . Pay an upfront 17 GBP and 80 percent of the time and 2 months later, he says he cannot get the replacement part - sorry, no refund.
At least he's honest that it can't be properly repaired. Most of my repair work can from people who had been screwed by hacks who patched things together just long enough to get paid. I either repaired the item, or told them it wasn't worth the money.
They were all free to chose, and chose wrong the first time.
-- You can't fix stupid. You can't even put a Band-Aid? on it, because it's Teflon coated.
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