2 Sep
2004
2 Sep
'04
11:47 a.m.
>From: "Tom Jennings"
<tomj(a)wps.com>
>
>THe worst part -- the motor had a trimpot in series with it, and that
>was the sole motor speed control -- and! -- tapes written at one speed
>adjustment could not be read at another speed!
>
>Of course I turned the pot, my fault. But just tapping it was enough. It
>was total crap.
On Wed, 2004-08-25 at 11:57, Dwight K. Elvey wrote:
Most of these motors used an internal centrifugal speed
governor. These were designed to work within some span
of input voltage. I would guess that the pot was to drop
the voltage to be within this range. If one was to adjust
the pot, there should be a range of adjustment that the
speed ( with load ) was relatively constant. One would
adjust the pot to be safely within this span.
Not this one. I distinctly recall spending HOURS trying to recover my
tapes, with a 'scope and listening to the data whine on the built-in
speaker. Speed was proportional to the pot setting. Maybe I got an early
one, or something, but it was crap.
The whole package was of poor quality too. I actually threw it out
within a few years.