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The FD-55 Family

The TEAC floppy disk drive family FD-55 includes three generations. The second generation carries the letter V and the third the letter R.

series 2nd 3rd specs
A -/- -/- SS, DD, 48 tpi, 80 tracks, 250 KByte
B BV BR DS, DD, 48 tpi, 80 tracks, 500 KByte
E -/- -/- SS, QD, 96 tpi, 80 tracks, 500 KByte
F FV FR DS, QD, 96 tpi, 160 tracks, 1 MByte
G GV GR DS, HD, 96 tpi, 160 tracks, 1.6 MByte
GF GFV GFR DS, HD, 96 tpi, 154 tracks, 1.6 MByte
DS, QD, 96 tpi, 160 tracks, 1.0 MByte
DS, DD, 48 tpi, 80 tracks, 500 KByte
GS -/- -/- DS, HD, 96 tpi, 154 tracks, 1.6 MByte
DS, QD, 96 tpi, 160 tracks, 1.0 MByte
DS, DD, 48 tpi, 80 tracks, 500 KByte

In addition to the type designation, there is also an identifier for the control board and a 2, 3 or 4-digit number. For example FD-55BR-501-U.

To be continued ... but if you download the following documents you will find "almost" everything about the FD 55 series.

Specifications (S) and brochures (B)