Hello, Timenutters-- I only have experience with four different LPRO-101 units, but with respect to heatsinking, all 4 behaved identically during my testing of them.
It appears that the LPRO-101 units do not require much heatsinking. I experimented with a variety of heatsinks and discovered that just bolting them down to a 1/8" thick flat sheet of aluminum roughly 8" x 10" (no fins, just a flat sheet) kept the case of the unit and the aluminum sheet below 105 deg F. That is relatively quite cool as far as electronic circuitry is concerned-- only slightly warm to the touch. The 4 units I tested were powered by a regulated 24VDC supply and the aluminum sheet was kept vertical and had good air flow around it. I also experimented with a heat sink that is very nearly the same size as the base plate of the LPRO units but only has ten 1/2" tall fins that are quite wide spaced on it. With that particular very minimal heatsink the highest temp reached after 4 hours was only 97 deg F. I put a teeny 12 volt CPU fan about 2" from the fins and ran it on 6 volts DC to keep the blade speed waaaaaaay down (and essentially silent). After two hours had elapsed, the heat sink and case were still only ever so slightly above room temperature. Bottom line seems to be that the LPRO units must have at least some minimal heatsinking but they do not require much. The four units I tested came to me with their base plates covered with a very thin layer of some sort of a pale green heat transfer material so I did not need to apply any of the typical messy white "moose-poop" zinc-oxide and silicone grease heat transfer paste. Mike Baker WA4HFR Gainesville (Micanopy) Florida --------------------------------------- _______________________________________________ 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.