Chris108 said:
Quote:
Lacking that, probably the best thing to do is look for, or build a crystal calibrator. Crystal reference modules from junked PCs and other devices can be had for little or nothing; most of them simply require five volts DC input to produce a reasonably accurate and stable output that can be used to see if the counter is right or not.
Hopefully the counter already has a crystal oscillator as its reference frequency, so comparing to another is really chasing your tail - which one is right?
If you have a receiver that will receive WWV/WWVH with SSB at the same frequency as the counter oscillator or it's harmonics, then there is a good method that I use that will get you pretty close. I see that the 1911 has a 10MHz oscillator and spec is 2ppm.
Let us know how you get on.