List, I was looking on Ebay for some HP E1938A oscillators What I found listed were: HP E1938A 10 MHz Quartz Oscillator with EFC on PC board. $100 Fluke.l HP E1938-60201 Ovenized Crystal Oscillator (on a PC board) $100 Tomy Chou HP E1938A Ovenized Crystal Oscillator W/O a PC board for $50 and free shipping from 2010bluebook. My question is thus: What does the PC board do? All I need is a HP EFC oscillator that would be better that my HP 10811-60111’s. Do I need to worry that the E1938A’s without the board maybe of lessor quality than the others? Fluke.l says his units are good but not stellar. The other venders say they have tested the units and guarantee them to be good. If so, would it get better with aging? So what does the collective wisdom/experience of the group think? TIA Regards, Perrier
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