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Unknown GPSDO but BG7TBL logo on the circuit board and OCXO !

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Alfons:
Received today. I actually expected the "green" GPSDO, because it was shown in the Ebay description. I paid € 95. Instead I got this:

Diabolo:
Hello,

BG7TBL to install a resistance R29, what is its value?
What are the references of U6 and U7?



Thanks.
Regards

Diabolo

cdev:
They probably are made on an assembly line during the night shift or something like that.

Hans_18T:
R29 = 1K (measured) SMD is mentioning 01B
U6=U7= 74HC390

0xFFF0:
Is it this circuit?
https://github.com/dfannin/gpsdo

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