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I use an old Heathkit frequency counter. Unsure of the model, as it's out in the garage (used it out there today) but will post model number when I put it back on the bench tomorrow. It uses the old nixie tubes for the digits. When I checked it against my rubidium oscillator, it was 3hz low. It was last calibrated about 6 months ago. I figure that's not too bad for an old counter. They can be found on Ebay, I have seen them there. Put a good probe on it, and get it calibrated, and they are actually pretty accurate!

~Cheers~

[QUOTE="ExitThirteen, post: 400887, member: 6878"] I use an old Heathkit frequency counter. Unsure of the model, as it's out in the garage (used it out there today) but will post model number when I put it back on the bench tomorrow. It uses the old nixie tubes for the digits. When I checked it against my rubidium oscillator, it was 3hz low. It was last calibrated about 6 months ago. I figure that's not too bad for an old counter. They can be found on Ebay, I have seen them there. Put a good probe on it, and get it calibrated, and they are actually pretty accurate! ~Cheers~ [/QUOTE]

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