Products > Test Equipment

VFO Frequency Check

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ko4nrbs:
If using this counter, what do I need in order to check the frequency on an old Heathkit HG-10 VFO?  Its output is 5 volts RMS.

The counter:
https://usa.banggood.com/1Hz-50MHz-High-Sensitivity-Frequency-Meter-Counter-Measurement-Tester-Module-7V-9V-50mA-p-1662557.html?cur_warehouse=CN

Thank you,
Bill

Grandchuck:
Do you have an oscilloscope probe?

ko4nrbs:
Yes, I do.  I wanted to use this and keep it on while operating so I can constantly monitor my frequency.

Bill

David Hess:
What I would do, and what I have done in the past, is hand wire a JFET or bipolar transistor follower into the oscillator to drive a coaxial transmission line going to the frequency counter.

Swainster:
This is probably one of many "clones" of the pic based counter by DL4YHF https://www.qsl.net/dl4yhf/freq_counter/freq_counter.html. If so, you will need to turn off the power saving mode (it may be off by default - I think it was off on mine). You can find the manual at https://www.qrpproject.de/UK/DL4YHFcounter.html. Watch out for any preprogrammed offset -  if you dont realise it is there then it can cause a lot of head scratching.

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