Comments on Profile Post by neo_the_one

During the evening I also hear a faint radio signal in the noise floor. I have kept the transformers as far away as physically possible.

More people in the house/neighborhood using power in the evening? Cover your phono pre in foil to kill radio signals, not joking.

Is the humidity lower in the evening than during the day (HVAC running more)? If so you may be experiencing static buildup increasing surface noise.

Do you live near large transmitting towers? If so you need a Faraday cage, maybe only around the phono preamp but possibly around the entire turntable and phono preamp.

Are there any appliances running more in the evening possibly putting more noise on the AC mains? This includes in-floor heating systems.

Not sure, how to isolate if some particular appliance is causing an issue with the main. I don't live near a tower either. I tried @JK47's advice and converted the phono with tinfoil. Then I raised the volume a bit without playing any record.

I could still pick up the stray radio signal. Then i disconnected the TT from phono preamp and the radio signal did go away(almost). That would mean that the TT is somehow acting as an antenna. Or the signal is coming from the mains. I have the TT plugged directly into the wall socket.

Did you disconnect the RCA's from the TT or the phono side? What RCA's (shielded?) are you using and how long are they?

I disconnected them from the phono side, they were still connected on the TT. The RCA is shielded by plastic. This is the type of cable - https://www.futureshop.co.uk/chord-c-line-2-rca-to-2-rca-audio-cable. They are 3ft long.

Try unplugging from the TT side and see if the radio station is still there to rule out the RCA's (may need better shielding? wrap foil around them) or the TT (maybe picking it up from the tonearm and head shell/cart leads?)

i'll try this out.

@JK47 I was able to diagnose one thing. If shield the RCA cables from phono to the amp, the radio signals do subside. Do you have any suggestions for decent shielded RCA cables. Tin foiled cables really look ugly.

I use Blue Jeans cables, however YMMV. Try a few "shielded" cables from Amazon maybe and hear what kills the radio best.