But we got them before the prices skyrocketed (Back then it was $110 for a unit , and $200 for a kit)
WOW $110 for a GPSDO, that would have been great. Sadly I panicked about a FE5680A at $89 (free shipping) on ebay and already bought one, the next cheap one is about $120 (incl. shipping). At least the seller claims it's one of the latest UN-7XXXXX models available from eBay with 2004 manufacturing date. Having bought the counter and the rubidium standard, I have left about 30-40 bucks.
How difficult could it be to later make a GPSDO using this FE5680A and a GPS receiver with 1 PPM output? Any place to start reading the basics about how to do it?
Is there any GPS receiver unit recommended for this? Maybe I can afford a cheap one.
Anyway, I hope the OCXO in the HP counter is working good, seller claimed last calibration was in 2010, but cannot trust him because he doesn't seem knowledgeable about test equipment, he mainly sells used low end audio stuff.