On 11/9/2019 3:16 PM, Mike C wrote:

I would
never do it to a GTOCP outside in wildly swinging humidity and temps.

Now... this is a -40C certified switcher from TDK Lambda:
https://www.digikey.com/product-detail/en/tdk-lambda-americas-inc/HWS150-15-HD/285-1299-ND/1631480

Conformally coated circuit boards, Nichicon capacitors, and I know...
it's 8x or 10x the cost at $148.

I'm always open to suggestions from knowledgeable people, and what you say makes some sense.

OTOH, Roland posted here that the Mean Well supplies work with A-P mounts, and I assume that means outdoors under varying conditions.

Mine is in the observatory still pumping 15 watts into a resistor box after 10 hours, and the temp is 33F and 74% RH. I'll be interested to measure the voltage tomorrow morning after 24 hours.

Lambda has a solid reputation, and the datasheet on that supply looks good. I might just spring for the additional cost to put my mind at ease.

Thanks for the link.

--
Mike

Mike Dodd
Louisa County, Virginia USA
http://astronomy.mdodd.com