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TEAC FD-30A

Today (26. Aug. 2020) I got a nearly new TEAC FD-30A, bought from ebay UK.

What a litte cute 3" floppy disk drive. Just amazing!
TEAC FD-30A
What size differences: TEAC FD-30A vs. Shugart 851

And the best thing is. You can run it with MS/PC-DOS without any problems! Why? The TEAC FD-30A (3") is fully compatible with the TEAC FD-55A (5.25"). Both drives are single sided, but this is no problem with DOS. DOS supports both the single sided 160K (8 sectors/track, FEh) and 180K (9 sectors/track, FCh) logical format.

Another special feature, you can use the hard case 3" disks on both sides. Just flip it over!

Although the FD-30A can be used in an IBM compatible PC, it was never used there. The FD-30A was used in the Tatung Einstein TC01 for example, see manual below.

Technical specifications

FD30 technical specifications
TEAC FD30A technical specifications
(Source: Brochure TEAC FD-3OA)
FD30 technical specifications
TEAC FD30A technical specifications
(Source: Brochure TEAC FD-3OA)

Pictures

TEAC FD-30A
Pic. 01: TEAC FD-30A
TEAC FD-30A
Pic. 02: TEAC FD-30A - PCB with „one“ LSI (7358-00)

Unlike the brochure of the FD-30 and FD 30A, my drive has only one LSI chip. Basically TEAC always has two LSI chips in its drives (FD-30, FD-55).

  1. TEAC 7358-01
    • 2 x 15 pins, rectangular
    • FD-30, U2
    • FD-55, U9
    • analog
    • READ/WRITE CIRCUIT
      • read amplifier
      • waveform shaper
      • write data input latch
      • write and erase drivers
  2. TEAC 1922-00
    • 4 x 12 pins, quadratic
    • FD-30, U3 (but missing, see pic. 02, red circle)
    • FD-55, U6
    • digital
    • CONTROL CIRCUIT: full logic controll over
      • all operations of the drive
      • the I/O signals
      • the head positioning stepper motor
      • the spindle motor

Why my drive has only one LSI chip is unknown to me. It originally comes from a Tatung Einstein TC01. It is possible that special drives were used for these computers. Who knows?

TEAC FD-30A
Pic. 03: TEAC FD-30A
TEAC FD-30A
Pic. 04: TEAC FD-30A

Manuals (M) and brochures (B)