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Foil Shielded my JMT/Cmoy/Aph Amp

post #1 of 5
Thread Starter 

My amp was a bit sensitive to EMI made evident by moving my hand close to the amp while amplifying a null signal. So I opened it up and added two foil screens on top and bottom of the amp using some electrical tape and glue. Thankfully the amp still works without EMI to boot.

I also scrapped my crappy long mini-2-mini cable with one with improved shielding and added 90 degree minijack adapters.
post #2 of 5
out of curiousity, did you connect your foil shields to the amps ground or are the just hanging around??
post #3 of 5
nice amp!

yeah, the foil should be connected to the ground... You can also try the altoids can for shielding.. works very well, and looks cool too...
post #4 of 5
so is your EMI problem gone now?
i don't think Al is that good of a conductor.
how about sheets of steel?
and yes, the shielding should be connected to GND.
post #5 of 5
Thread Starter 
My EMI problem is fixed to the extent that my hand doesn't make it hum and the only noise I hear is from source. I connected both sides to ground.

I definitely remember the TA as being something that could benefit from more shielding.

I think I should find a bigger source of EMI/RFI and test out a few mini-2-mini cables as well. I already scrapped one which had pretty much no shielding.
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