![]() ![]() ![]() ![]() I designed a PCB to get a professional finish as well as a reliable upgrade for my counter. I decided to make a clone 010 option board for my counter using a second-hand OCXO bought from e-bay. There are many second-hand 10MHz OCXO modules available, these are mostly stripped from old telecommunications, satellite or cellular equipment so they are plentiful and relatively cheap to buy too. Having obtained a reasonably reliable 10MHz lab reference (see here) I decided to calibrate my Frequency Counter only to find that the stock oscillator provided in the HP 53151A is absolutely terrible – a joke even! I looked around for an “010 High Stability Timebase Option” but they are rare - and if you can find one not installed in a counter they are very expensive – in the few hundred dollars range at least - and buying one from HP is, well, expensive in the extreme. ![]()
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September 2023
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