[sdiy] frequency counter

[Peter Grenader]

Ian Fritz wrote:

> For developing and testing new VCO designs it is crucial to have quantative
> data on tracking across the whole working range.


I may be wrong, but it was my understanding that he was wasn't talking about
the design stage in his original post.    He was talking about application,
after the circuit is completed.  Yes, a frequency counter is an absolute
necessity when designing or troubleshooting a circuit, especially a VCO.
But for using the synth afterward and tuning up your tracking, it's overkill
and will make the job much more difficult.

There are times I am brought in to Big City Music to adjust the 1V/oct
tracking of Analogue Systems' VCOs that have come out of adjustment due to
the shipment over the ocean.  Bare in mind that this adjustment on this
particular VCO is easier than most as there are separate trimmers for the
low end and the high end - much easier.  I follow the written procedure
which calls for a frequency counter - but do the final adjustment by ear.

For me it's not only more reliable but much much easier.

- P