Have removed the broken pot (actually on a Superadio II) - but there are no numbers on it that my local electronics store can use as a guide for replacement. Where can I get a replacement part?
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Re: volume control on GE Superadio
Although the pot is broken it may just be the wiper part & you can try measuring across the outside terminals (if broken disassemble)with an ohmmeter (DMM). If you get a reading say 10k ohms then you know what to order.
The page below describes mods to the Superadio III plus a bit about spare parts when you scroll to the end........
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If the pot has an engraved / embossed / screen printed value on it you may also be able to buy an exact replacement from your local electronics component stockist.
Otherwise take it with you as a sample.
Pots are standard values, so most component stores will stock your one.
This will be cheaper and speedier than ordering one.
i would say that the component that controls the sound level (called a potentionmeter) or (varible resistor) is either broken or faulty....you will need to remove the cover and inspect the area around the volume control just to make sure it is not broken or that any wiring has just become dry jointed....if all is good then what i would suggest to do is to find out the value of the pot...normally there around 10-50K then youll need to get a replacement...if this still dosen't fix it or your confident enough to look or fix it yourself i would take it to a local electronics repair shop....remeber to disconnect unit from power before removing cover hope this helps,ben
Before you replace the pot, try cleaning it. Use electrical contact cleaner such as:
- CRC QD Electrical Contact Cleaner (available at many auto supply stores) - www.crcindustries.com - Caig DeoxIT (available at Radio Shack and electronics supply stores) - www.caig.com/
Spray the cleaner liberally in the pot (spray where the shaft meets the pot, and if possible, into any holes on the back of the pot), and rotate the shaft repeatedly. Repeat several times.
If the pot is still intermittent, it can be replaced, but you need to replace it with a compatible part, and the job will require some soldering skills to prevent damaging the rest of the circuit.
Make sure you get an appropriate replacement. You need a replacement pot with the correct resistance (measured in ohms) and taper (linear or analog). Typically, the value of the pot is marked on the back, and will read something like "103A" or "10K - B". 103 or 10K indicate the resistance in ohms, and "A" or "B" indicate whether it is linear or audio, respectively.
Your best bet is to desolder the part and take it to a local electronics store for a replacement. If no store is available locally, replacements can be ordered from online stores such as:
- Mouser.com - Jameco.com - Digikey.com
Feel free to post the numbers on the back of the pot if you need help locating an appropriate replacement.
(Note that the convention for labeling taper has changed over time - getting the wrong taper should not damage the equipment, but will probably result in the volume control to seem "not smooth.")
the volume control needs to be cleaned. if you can carefully take the back off, the volume control may have some small openings in the housing. spray contact cleaner (or even a small amount of wd40) in it and work the control back and forth and see if that does it
I had the same problem with a number of the radios we have here. The trouble was the volume control pots had broken loose from the circuit boards. Some I was able to repair by resoldering and some needed new pots. We got parts from a local Motorola distributor.
have you tried just cleaning them? even though they are probably supposed to be "sealed", most of them are not. if you purchase a can of pressurized tuner cleaner, radio shack used to carry it. saturate the volume control while turning it. i usually wrap the unit with paper towels as to not get the rest of the board. i also usually put on my safety glasses. you will see why. i am usually surprised as this works well with 90 percent of them i do.