I just do a quick layout with a CAD program, and print out the artwork on a
transparency. This gives me the tool I need to expose photosensitized
boards.
I wonder about that R75 circuit. For all of the time that I have had that
receiver, I have never used the sync detect mode. I don't even use it on my
SW8 or my AOR7030. I know that many folks like this function, so it is a
worthwhile thing to design into the receiver.
I am not sure how well this circuit will lock, so it may just be a first
pass at most. Still, signals won't be fading into the noise floor of the
system; the atmospherics will be the determining factor.


Pete

starman wrote in message
...
Pete KE9OA wrote:

I know...........it seems that the more you learn, the more you realize
how
much you just don't know.
On another note..................I am working on a quasi-sync detector,
so I
should be able to build the prototype unit up this Monday. Basically, it
consists of a limiting amplifier (MC1350) feeding the squared up I.F.
signal
into the LO input of an NE602. The unconditioned I.F. signal it fed both
to
the input of the limiting amplifier and to the RF input of the NE602. It
should be interesting.
I've been meaning to get around to these things for the past couple of
years..........I'm glad that this radio project came along.

Pete

That should work when the signal is strong enough to keep it locked but
I think it would be prone to losing lock when the signal fades. I wonder
if the sync' in the R75 is actually a quasi design?

BTW- How do you breadboard your circuits?


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