2. amps-preamps
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Transformer Noise

I have an old Krell KAV-2250 that sounds pretty nice, except for the transformer hum.  The hum is noticeable when the volume is at zero and slightly audible at lower levels.  The amp has been unplugged for a few years.  Is there anything I can do to eliminate the hum or does that just something I have to live with due to the high power transformer?  I was going to send this to my son, but I think it might really bug him (it's bugging me too!)
thegoldengoose

Showing 2 responses by thegoldengoose

thegoldengoose's avatar
thegoldengoose OP
44 posts
 
Erik, you are magic! I unplugged a small transformer that was next to where my amp was plugged in and the noise stopped immediately. The offender was a small "wall wart" that charges my Chord DAC.

I had another amp plugged into the same location (with a different power cord) and I didn't have that problem.

Thanks for this post & all your other posts!
thegoldengoose's avatar
thegoldengoose OP
44 posts
 
I emailed Chord.  Perhaps they can verify if the wall wart is switch mode or not.  I directed them to this thread.

Much thanks for all your comments.
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