[sdiy] Frequency counter

[James Patchell]

There is a TTL counter inside that uses a diode matrix to set the divide 
ratio that sets the speed for the motor that turns the wheel.  Because of 
the diodes, the voltage at the input they drive is at a very marginal 
level, and sometimes the counters refuse to respond....sort of a bad 
design.  Still, the Conn unit seems to be the one that is easiest to use.

There are a few other technical issues with the thing as well, although 
they are much more minor.

At 08:59 PM 1/29/2005 -0500, Roy J. Tellason wrote:
>On Saturday 29 January 2005 05:39 pm, James Patchell wrote:
> > Personally, I prefer using a strobe tuner for adjusting the pitch of VCO's
> > as you instant feedback as to which way the pitch is going.  There is, of
> > course, the cost problem.  I would keep an eye on Ebay, as they do show up
> > there quite often.  A Conn Strobe tuner, when they are working and in good
> > shape is real nice...but if it is in bad condition and not working, they
> > can be a night mare.  The Peterson tuners are also very nice.
>
>I agree about how nice those Conn units are.  I got to use a couple of them
>during the years I was working on stuff.  I don't recall much about the
>Peterson one that I got to use once,  but I wasn't as impressed with it.
>
>Never had any trouble with them during those times I was using them.  What
>sort of stuff did you run into that you use the word "night mare"?

         -Jim
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