[Coco] No MPI - any suggestions?

[Bruce W. Calkins]

 > 1. The CCR-81 and all its ilk all use 'dc bias' cuz its cheap, often 
saving
> battery power by using a permanent magnet swung against the tape for 
> erasure
> when the record button is pushed.  It also gives a signal to noise ratio
> that's 30 db poorer than a decently designed 100 kilohertz sine wave bias 
> and
> erasure generator can do.
I made a practice of bulk eraceing any tape I was reuseing.  I had few 
problems with the CCR-81 once I started that.

Bruce W.