A few weeks ago I noticed that channel 4 on my 244 seemed a bit odd. I had to replace the fuses again for the playback amps and on playing the test tape I made in '82 found the high freq playback response way down. Less than -20dB for a 0dB recording from 20 kHz to 1kHz, then 0dB until 125Hz then -7db and less than -20dB thereafter. On all the other channels flat within 2dB from 16k to 25Hz -as was the case for channel four until now. Does anyone have any ideas what could have happened? Maybe it is a head wear effect. Apologies if I can't reply quickly as I wil be on the road for a while over the next week. Grateful for any help, as always!