[time-nuts] Z3801A help!

cdelect at juno.com cdelect at juno.com
Wed Aug 23 22:55:35 UTC 2023


Thanks to help from Andrew I replaced the missing resistor but still no
luck.
Found the 5V DC-DC for the outer oven dead! 
Scrounged around in my box of DC-DC units and found a UWR-5/1800-D48.
The original is a UWR-5/4000-D48 but I can't see why they had a 4 Amp
unit in there except maybe for high temperature derating.
Installed the 1.8 Amp unit dead bug style and after having to do the J2
pin 8 workaround the outer oven came up OK and regulated! Hooked up my
antenna and after a while it locked up!
HooRay :)
After 24 hours the DC-DC units were warm but not hot!

Back in business.

Cheers,

Corby
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