I have several of the units and made up a cable to attach 24V power, a voltmeter, and the 10 MHz output. I watched the 10 MHz on a scope against a Thunderbolt as an X-Y display. I did this without using a heat sink and it took about 5 minutes or less for the BITE to indicate lock (going from +5V to 0, as I recall) and the lissajous figure to approximate a circle.
I am sure you do not want to use the unit in service without a heat sink but I have been told that it is ok to do a quick power up and test without a heat sink and I have done it several times. The specs for the heat sink requirements are in the LPRO manual. Joe -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Glenn Little WB4UIV Sent: Sunday, January 11, 2009 10:13 PM To: Time-Nuts list Subject: [time-nuts] LPRO-101 I have a LPRO-101. Before I power it up, I have been advised to use a heatsink. How large of a heatsink do I need? I found an extruded heatsink in the junk box. This heatsink has fins about 0.50 inches high. The width is 2.375 inches wide. It is 8.125 inches long. I plan to cut this heatsink in half giving me two 4.0 inch pieced. I plan to bolt each piece to the bottom of the LPRO-101, using the six mounting holes, three per heatsink. Would this be sufficient heatsink? Thanks in advance. 73 Glenn WB4UIV _______________________________________________ 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.