Hello all,
a friend purchased from the bay a <subj.> in the LPRO configuration.
After some problems encountered during the first power ups, he asked for
help - I'm passing the questions further...
After about 9 minutes of warm-up from room temperature (22°C) the lock
signal goes low, but after a short time starts to switch low/high with
decreasing low periods, until it remains high with short low pulses,
spaced at about 2 seconds. After power-down, and sufficient cooling
time, the cycle repeats.
First step was to reapply the thermal interface to the integrated Al
radiator, which helped a bit, the time during which the unit is locked
growing slightly.
Next step was forced cooling, which helped more, so the lock loss could
be attributed with high probability to elevated operating temperatures.
The temperature of the base plate (integrated Al radiator) at which lock
gets lost is about 40°C, so for a reasonable operation it should not
pass about 36°C, at which the power consumption raises to about 17W.
That also means that for a 1°C/W heat sinking - obtainable with a larger
passive HS or active cooling - operation above 30°C ambient gets
practically impossible (except refrigeration, Peltier, etc.).
Any further help or suggestions are welcome.
Regards,
bbg
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
