How far is your SUT from your Phono Pre/Preamp?


Had to go back to the internal SUT in my phono pre today because it needs to be at least 3 feet away from the preamp or phono pre to prevent hum. Is this normal? I don't really have the 3 feet available.

dhcod

Showing 2 responses by atmasphere

@dhcod I have real trouble believing that the Jensens are actually worse than your outboard SUT. But in order for them to work right, the Jensens must be loaded correctly at their output. I expect Lamm has a provision for that. The loading changes from cartridge to cartridge and Jensen has published a pdf on their website with the correct loading values based on your cartridge.

It may well be a power transformer associated with the SUT that is causing the hum. IOW look at associated equipment to see if there is a power transformer nearby that might be causing this.

All good advice here.

In addition to Raul's comments you might also try a different orientation of the SUT.