
Herm
Well-known member
It sounds like things may getting better. I was wondering do you have dbx on this machine?
1) Set an oscillator to a medium frequency, like 1000 Hz at a nominal recording level and monitor the recorded signal with a VU meter.
2) Reduce the bias level until the signal drops precipitously, then increase it until the meter just peaks. If you overshoot, back it down a little bit until you are just below the peak level.
3) Set the oscillator to a low frequency, say 30 Hz and monitor the recorded signal with headphones. You will hear the low frequency tone modulating the noise and distortion components. Try to separate these in your attentions.
4) while listening to the tone being recorded, adjust the bias until the modulating noise is at a minimum.
The test tape is used to make sure heads are in alignment and the levels are set right for playback?