Here's a sample recorded from the fixed level phono outs.

Hiss and buzz (317KB)

The first 10 secs is the general hiss at a higher master volume level once the mic input socket has been 'activated' (there was silence before).

The rest of the sample introduces the buzz as I gradually raise the mic trim from minimum to maximum.

For this experiment I used the adaptor to activate the mic socket, but it's the same when the mic is plugged in.

I've normalised this to 0dB... it isn't this loud in real life.

Cheers,
Rich