What is it??

[Mark Graalman WB8JKR]

  Its a squarewave time base signal generator used to
calibrate oscilloscope horizontal sweep generators.

73,  Mark  WB8JKR


On Sat, 1 Feb 2003 18:03:15 -0500 "Dwight D. Smith Sr."
<wb8jpj at ADELPHIA.NET> writes:
> Hi gang,
>
>     Last year I purchased a bunch of Heath equipment.  In one box
> which was postmarked Dec 26, 1974 was a circuit board with the
> number 85-1521-1 on it.  It has a power cable going to the board and
> it is marked 6.3 volts AC/DC.  It has a 4MHz Crystal, a double
> flip-flop circuit to divide the frequency to 1MHz and then 3 decade
> counters to provide 100 KHz, 10 KHz and 1000 Hz.  What was this used
> for?  Some sort of a calibrator I would think, but for what?  It
> also has the correction sheet for page 8 in the manual.
>
> Thanks
>
> Dwight
>
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