Miniature tape recorder collection

8 thoughts on “Miniature tape recorder collection”

1. Lon says:

   August 10th, 2006 at 12:10 pm

   wow — does this bring back memories!

   one question: does it include the standard IMF self destruct? :D

2. Oracle1729 says:

   August 10th, 2006 at 2:42 pm

   I find it amusing that the pictured record has a 9V battery to power the electronics and a pair of AA’s to drive the motor.

   Ah, those simpler times :)

3. c0redump says:

   August 11th, 2006 at 5:37 am

   That arrangement of separate batteries for motor and amplifier was quite common for these little gadgets. I had a small tape recorder (back in the 1970s) that used the same setup. One advantage is that the electrical noise from the motor (on the AAs) doesn’t get coupled to the sensitive amplifiers (on the 9V battery).

   Perhaps it’s a design left-over from the days of valves, with separate heater and high-voltage batteries?

4. Oracle1729 says:

   August 12th, 2006 at 1:49 am

   I know it used to be common, I’d almost forgotten about the design until I saw that picture and had flood of memories.

   In retrospect, I wonder why they couldn’t just use a decoupling capacitor, they had the technology at the time. You could be right about the holdover design.

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