[R-390] Signal Amplifier Needed

Scott, Barry (Clyde B) [email protected]
Mon, 22 Mar 2004 09:29:53 -0600


When I use my signal generator, I usually connect my frequency counter to
the output to monitor and accurately set the generator's output.  I know
this is generally not needed, but for some things, accuracy is necessary.

The problem I have is the counter needs a fairly strong signal whereas the
circuit in question may need a very low signal so I end up switching the
output level up and down.  It can get pretty annoying, especially when a
very loud signal suddenly comes through the radio!

Is there a simple circuit I could build, perhaps an op-amp or two, that
could amplify the signal going to the counter while, at the same time,
leaving the signal generator at the low levels needed for the radio?  For
example, I may need the generator set to 1mV, but the counter needs about
100mV to drive it.

I'm not a EE design engineer, but I think a simple circuit could accomplish
this.  Are there op-amps that perform in the 100kHz to 30mHz range that
could be used in a simple circuit for this?  Am I dreaming to think this is
a simple endeavor?

Thanks,

Barry(III) - N4BUQ