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Vinyl Asylum Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ. |
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Vinyl Asylum Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ. |
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In Reply to: radio over the turntable, Thorens-Jolida posted by bewareofdoug on May 16, 2017 at 17:25:09:
Many vinylphiles have. The shielding on your ICs (either the ICs from the turntable to the phono preamp or from the phono preamp to the line stage) is insufficient to prevent the electromagnetic radiation pickup.
Do you live close to a radio station transmitter? Check your neighborhood for radio towers and power lines. I once had a problem where there was an intermittent frying type noise on my Denon DP-62L/phono preamp hookup. I tried everything that I could dream up but the only thing that fixed it was when I moved.
Currently I have a very low level hum that I am picking up. I have tried all sorts of things and I was beginning to think it was a ground loop. I proved where it was by disconnecting the phono leads from phono preamp and placing rca caps over the inputs. The hum disappeared, so it was being picked up from the phono leads or the tonearm.
I own a VPI Prime and hum pickup is not common, so I looked at the phono leads. Initially I was using a set of Kimber Heros w/WBT RCA connectors for the phono lead. I replaced that with a set of Audioquest Leopards and the hum picked dropped greatly.
Its not gone but it can be tamed with a better phono lead. I may invest in a better shielded phono cable in the near future but the level of the hum is very low so its not a critical problem now. Your problem is similar.
You are picking up something other than hum but it is electromagnetic interference. The only way to isolate your setup from the problem is with better shielded phono leads (or the ICs between the phono preamp and line stage). You have to remove or cut down on the amount of interference you are picking up.
Remember that the phono preamp is a device that has lots of gain. You can pickup all sorts of interference if you don't isolate your connections. Its a tough problem but not an impossible one to solve. Just concentrate on finding a better shielded connection between your turntable and your phono preamp (it still could be the IC between your phono preamp and your line stage but your turntable leads are a better bet).
Ed
Life is analog...digital is just samples thereof
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- You are fighting a problem that - EdAInWestOC 06:55:57 05/17/17 (0)
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