Tape recording theory
"Geoff Mackenzie" wrote in message
...
Wasn't there a thing in the fifties called "GramDek" or something like
that which you put on the turntable of your Dansette to convert it to a
tape deck?
There was, and it was advertised in full-page adverts, not the small ads.
It fitted any normal record deck. It consisted of a metal plate carrying the
spools with the heads and capstan in between which fitted over the spindle
of the turntable, with a fixture to prevent the whole thing from rotating.
The capstan was driven by the turntable, at 45 rpm the tape speed was 7.5
in/sec, other non-standard tape speeds were available on a multi-speed
record deck. Finally a small battery-operated box contained the pre-amps and
bias osc (erasure was by permanent magnet). The user had to contrive somehow
to connect the audio from the pre-amp to the record player's (or another)
main amplifier.
How well it sold I don't know, but it was heavily advertised for several
years.
David.
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