Difference between UCT 108663-01 and UCT 108663-02

[dnessett]

A supplier on ebay failed to ship some UCT 108663-01 DOCXOs to me that I purchased. As part of the resolution process, he offered to include an additional oscillator as compensation. However, when I received the shipment, the extra oscillator was a UCT 108663-02 rather than a UCT 108663-01. I have Googled both device numbers and found that both are for sale, but could not find the difference between them. When I tested the units they all provide a 10 MHz sine wave. So, I imagine the difference may have something to do with stability or perhaps the EFC tuning range (this is a pure guess).

Does anyone have information on the distinction? The only spec sheet I could find is for the Oscilloquartz OCXO 8662/8663. Comments on the EEVBlog suggest the UCT is a rebranded Oscilloquartz, but the identification information is not the same.

Thanks for any help.

[tkamiya]

I bought whole bunch of OSA 108663-01.  I too, heard, they are renamed verison of Oscilloquartz  units.  These being and old stock and so many fakes around, I really don't know if caring too much about 001 and 002 is productive.  Chances are, those are higher-spec units but I have no way to be sure of this.  Really, only way to be semi-sure is to take a few and test them yourself.

Very much pain in a butt but that the way it is on eBay sometimes.

[FransW]

The UCT 108663 seems to take more time to stabilize.
See:
http://www.miedema.dyndns.org/co/2019/ocxo/MasterClock2-met-UCT-OCXO-koude-start-1000pix.png
and:
https://www.circuitsonline.net/forum/view/143072/3#highlight=01+uct%200

Text is unfortunately in Dutch.
If required, I can translate.

Frans