I have a problem with an AMI E80 making a resonating sound while scanning. I just installed an Audio Technica AT3600 magnetic cartridge. Tied the positives together and negetives together at the cartridge. Installed an external preamp as well. Sound and tracking are good. No issues if it scans a couple selections.
Problem is when it is scanning distance it picks up a very loud resonating sound that stops immediately when the needle lands in play position. Not sure if the mute relay turns on or off in play position but when the needle lands and the click of the relay is heard the loud resonating stops immediately.
Amplifier has been rebuilt DD model previously and sounded decent with the crystal cartridge but wanted to upgrade for lighter tracking and stereo compliance. No loud resonating issue at all.
I have done this with an AMI F model with no issues. I know the F model uses an amplifier that is designed to use a magnetic cartridge but wired the cartridge the same way.
Thinking that something is being picked up and amplified from the scan motor?? Not sure so any advice would be helpful. Joey McDonald