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Almighty TT hum --- help

I have seached the archives on the topic of turntable hum and found some info, but nothing that helps my situation, so here goes...I just ressurected an old (23 years) Technics turntable with an Audio Technica cartridge (...I know --- decidedly LOW FI, but I have young kids that suck up virtually all of my time and money). I am aching to get back into vinyl and I just wanted to see what the old table sounded like on the NAD 3020 I bought a couple of years ago. Holy hum, Batman!! Sounds like bad grounding, but I checked and cleaned all connections and that didn't help. The hum is only slightly louder when the ground wire is disconnected altogether. I would like to determine if my old TT is to blame or the old NAD. Any suggestions on my next step would be greatly appreciated.
wdhsvbgod
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swampwalker
5,132 posts
 


Try the NAD w a line level source. that should help you isolate it. Also check cart leads.
listener57
730 posts
 
When I ran into a similar hum trying to use phono inputs which had not previously been used, it turned out that the preamp female phono input jack of one channel had been detached from its internal soldered continuity with the preamp by someone in the past violently twisting off the male jack on the end of the cable from the turntable. This was a hum heard in both channels even though one jack was at fault.
rockvirgo
587 posts
 
My old time TT went humming in one channel a while back and it turned out to be defective interconnects. If your hum is in both channels your problem likely lies elsewhere.
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