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Remove Radio Station Background Noise

What is the best way to remove radio station sound from the TT feed to the pre amp? 

When I turn the volume up to about 50% I can hear radio station noise if my ear is next to the speaker.

I started using clamp-on ferrite chokes that clip around the cables from the TT to the phono preamp to eliminate the noise.  I wanted to know if there is a better solution or if the ferrite chokes compromise the sound.

 

The TT is a VPI Classic 3. The phono preamp is a Sutherland PhonoBlock and the pre amp (DMC-30SV) and amps (DMA-400) are Spectral Audio.  All cables are MIT Oracle MA-X. 

bigby
clearthink
1,421 posts
 

Good advice from @erik_squires about shielding also you want to keep the phono preamp near the TT and the cable between the two as short as possible. Are you sure all connections are tight, especially at the cartridge pins.

fuzztone's avatar
fuzztone
5,502 posts
 

Sounds like a LOMC to me.

bobsdevices
97 posts
 

Yes, you need EFI/RFI shielded cables.  2 twisted internal conductors covered by a shield (an aluminum foil covering then braided wire over the aluminum). Connect the shield to the - side of the RCA at the source end only and leave the other end disconnected.

vinylvin
145 posts
 

Try cleaning your RCAs.

bobsdevices
97 posts
 

There are some inexpensive cables on Amazon that will work well:

Made with Canare L-4E6S, Star Quad, Audio Interconnect Cable and Amphenol ACPR Gold RCA Connectors – Directional Design - Custom Made by WORLDS BEST CABLES

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