I had a tube RIAA sold it because of hum and other noise. Afterwards I noticed that my TT cables induced the notice (no shielding). So that was a waste preamplifier switch...
So make sure that your TT interconnects and tone arm wires (the material of the tone arm tube) is shielded. Because the noise/"signal" they PICK UP is then removed later on in most of the (not all) RIAA preamps. I personally feel that outside noise that has nothing with the signal from the cartridge to do is nothing I want in to the system.
And later on in the RIAA a RF-filter is removing it.. ..it should not have been able to enter in the first place. So I consider that if we need RF-filter in the RIAA stage then you have not kept the integrity of the signal from the cartridge.
I am glad to not having a RF-filter in my RIAA today not for that I think it is something bad but because any RF that may enter between cartridge and RIAA is exposing flaws in the shield somewhere. And now I know that there is nothing else in the cables than just the signal from the cartridge.
Of course you may have a extreme situation but preventing RF to enter in the first place then if not all is stopped then the RF-filter will help you out with the rest.
So make sure that your TT interconnects and tone arm wires (the material of the tone arm tube) is shielded. Because the noise/"signal" they PICK UP is then removed later on in most of the (not all) RIAA preamps. I personally feel that outside noise that has nothing with the signal from the cartridge to do is nothing I want in to the system.
And later on in the RIAA a RF-filter is removing it.. ..it should not have been able to enter in the first place. So I consider that if we need RF-filter in the RIAA stage then you have not kept the integrity of the signal from the cartridge.
I am glad to not having a RF-filter in my RIAA today not for that I think it is something bad but because any RF that may enter between cartridge and RIAA is exposing flaws in the shield somewhere. And now I know that there is nothing else in the cables than just the signal from the cartridge.
Of course you may have a extreme situation but preventing RF to enter in the first place then if not all is stopped then the RF-filter will help you out with the rest.