28 Nov
2010
28 Nov
'10
2:40 a.m.
On 27 Nov 2010 at 18:02, Al Kossow wrote:
Dig around on bitsavers. There is a detailed analysis
of the 3470 in
one of the disk directories (moto, shugart?)
3470's were used in a LOT of drives.
Qume drives used them. The other half of the puzzle is the MC3471
write amplifier which seems to be a bit more uncommon. I've only
seen it on MPI/CDC drives.
Another popular circuit used on Tandon and Micropolis drives as well
as quite a few other brands was the NE592 (identified as a video
amplifier, but perfect for floppy or tape read amplifier)
--Chuck