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Check out Roland Schellin's incredible miniature tape recorder collection from 50s/60s - [via] - Link (German) & translated.
Miniature tape recorder collection
Posted by Phillip Torrone |
Aug 10, 2006 12:39 PM
Made On Earth, Retro |
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wow -- does this bring back memories!
one question: does it include the standard IMF self destruct? :D
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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 :)
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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?
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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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