My recollection of reading the LPRO-101 Manual is that there is a requirement for a heat sink for continuous operation to keep the baseplate less than 70 degrees C. It is OK to turn it on for 4 or 5 minutes to make sure it 'locks' but, IIRC, there is a specific specification for a heat sink with a thermal resistance of less than 2 degrees C/W for ambient temperatures greater than 50 degrees C and there is a requirement that the baseplate be kept less than 70 degrees C, with either forced air cooling, mounting on a base plate or heat sink.
Joe -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Murray Greenman Sent: Wednesday, April 20, 2011 5:02 PM To: time-nuts@febo.com Subject: [time-nuts] Choice of Rb vendor Joe, If all you need is a fixed 10MHz source, you might be better getting an Efratom LPRO-101, which are available from the same sources. The LPRO-101 doesn't need a heatsink, and does not have the confusing array of different versions and options that the FEI units suffer from. As for suppliers, I have had good results with 'Fluke.1' also known as 'NBBob', and probably other aliases. He is fast and reliable on delivery, and replaces faulty equipment without argument. I have no experience with any other suppliers. Most of these suppliers seem to have little knowledge of what they are selling, so don't trust the technical details given without checking them yourself. 73, Murray ZL1BPU _______________________________________________ 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. _______________________________________________ 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.