Hi, I'm new to the forum and a real amateur at the technical end looking for help, advice on a PMC TB2-a that has developed a mains hum. I've tried swapping over with its "twin" (which is working perfectly), changed cables etc. but the hum persists. The speaker does work and once music is coming through I can drown out the hum . . . though it'd be nice to try and sort it. Thanks for any thoughts.
If you connect the Mole to the speaker with no input plugged in and the volume set at 50%, has the hum gone?
If not, is it 50HZ or 100HZ hum?
Check the unit is properly earthed with the three pin plugtop.
I have repaired over a thousand of these amplifiers and as long as it is not distorting, I have spares in stock to repair it for you.
If not, is it 50HZ or 100HZ hum?
Check the unit is properly earthed with the three pin plugtop.
I have repaired over a thousand of these amplifiers and as long as it is not distorting, I have spares in stock to repair it for you.
Thanks for the speedy response Jon. I unplugged the input and turned the speaker down but it's still there as before. It's 100Hz
I've tried a different power cable (the one that works perfectly for the twin) but the hum persists.
I can fault find it for you and probably repair it. PM me for more information or message me through my web site; info@jonsnell.co.uk and I will do what I can for you providing an estimate before I spend any money on it for you.