I was gifted a pair of Def Tech BP2002 recently that needed some minor repair and I’ve got one fixed but kinda stuck on the second and hoping for help.
The amp turns on but that’s all I can tell because the two potentiometer for the amps need to be replaced as the posts are sheared off entirely (and I think set to their lowest volume). They are both marked as A5K but that’s all I can tell. Any help appreciated.
Pictures below:
The amp turns on but that’s all I can tell because the two potentiometer for the amps need to be replaced as the posts are sheared off entirely (and I think set to their lowest volume). They are both marked as A5K but that’s all I can tell. Any help appreciated.
Pictures below:
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The 'a' symbol looks like the Alpha brand symbol.
Searching "Alpha A5k" will likely get you headed down the right path.
Good luck!
Probably 5k extended shaft pots, or buy shaft adapters also.
4k7 may be easier to get.
'A' may refer to linear or log, see below post for the way to check if you do not find the information on line.
4k7 may be easier to get.
'A' may refer to linear or log, see below post for the way to check if you do not find the information on line.
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If you can't find the original part, just take them out and measure the resistance value. Then determine if they are linear or log taper by taking the back cover off and measuring the resistance at the half way point of the element. 50/50 = linear and about 80/20 = log. Now you have all you need to find a substitute, along with the physical dimensions. A physically smaller pot would work too - just jumper the terminals to the board with small wires.
I fixed a welder with the same snapped shaft problem for a friend, I didn't have the right value single gang pot on hand, but i found another of the same construction. I prised off the metal tab around the pcb on my new pot and put the old pcb in before reassembling, good as new.
Thanks guys! I got a bit more brave knight and disassembled the pot itself, still finding nothing manufacture wise though.
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Here are the other amps pots. Yes the amps a
But dusty, I’ve been too busy getting them working to make ‘em pretty just yet lol.
Today was JB Weld day…
But dusty, I’ve been too busy getting them working to make ‘em pretty just yet lol.
Today was JB Weld day…
We out to the interwebz and took a shot in the dark to start with and snagged two of these.
They look to be close but will need that nub filled down….
https://www.ebay.com/itm/304482854457
They look to be close but will need that nub filled down….
https://www.ebay.com/itm/304482854457
The "nub" is an anti-rotation post intended to fit into a hole in the panel. It prevents the entire pot from rotating if the mounting nut happens to come loose. Sure, you can file it off or drill a small hole as you see fit.
I should have clarified when i mentioned swapping the pcb in a pot. i was unable to reassemble a single gang pot, but the rear pcb on a double gang type is easily replaced. i put the pcb from the broken single into the rear of the new double, and cut off the front pins. the pins were be in the wrong place, but the welder had wires to the pot so it made no difference.