I wondered if they plugged into some atca chassis with airflow. The lucent units I have each came with a large heat sink. I disliked the operating temperature. So I shut things down. I can very easily add a nice heat sink to the unit on the bottom. Regards Paul WB8TSL
On Wed, Jan 18, 2012 at 11:22 AM, Peter Gottlieb <[email protected]> wrote: > IMHO these units are designed for cooling by airflow around them and > minimal conduction cooling. With my unit there is minimal heat flow > from the unit to the PC board it came attached to. I am going to > simply cut down the board a bit and mount it in a small plenum made of > FR4 and use a small fan with controller. This will be simple and get > heat out from all sides. It should be the closest to the way it was > intended to be cooled, improved with the temp control, and still be > small enough to be placed into other equipment. > > > On 01/18/12, J. L. Trantham<[email protected]> wrote: > > Use one of your 'locked' Rb as the 'standard' and then look at the 10 > MHz > from the 'problem child'. See if you can adjust C217 (I think. Look at > the > archive.) to bring the 10 MHz signal close to the 'standard'. > Perhaps the oscillator is just out of 'range' and can be brought back > into > range where the loop can lock it. Or maybe that is what you have > already > done. > Both of my units get quite 'toasty'. > Joe > -----Original Message----- > From: [1][email protected] > [[2]mailto:[email protected]] On > Behalf Of Scott Newell > Sent: Tuesday, January 17, 2012 10:31 PM > To: [3][email protected] > Subject: [time-nuts] FE-5680A won't lock > Just got my 3 in from nichegeek. Paid Thursday, shipped Friday, > arrived this evening. Wow. (Actually arrived too quickly--I don't > have my t-bolt running, so I can't easily do an accurate frequency > check.) > Two power up and lock in <3 minutes. One powers up, gets toasty, and > gives 10MHz, but no lock and no PPS. > The tuning config on all three read back as 0. I've set the problem > child to near +/- FS and about +/- 25% of tuning range: still no lock. > Any suggestions on what I should look for or try? I'm not quite > ready to throw in the towel and contact the seller. > -- > newell N5TNL > _______________________________________________ > time-nuts mailing list -- [4][email protected] > To unsubscribe, go to > [5]https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- [6][email protected] > To unsubscribe, go to > [7]https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > References > > 1. mailto:[email protected] > 2. mailto:[email protected] > 3. mailto:[email protected] > 4. mailto:[email protected] > 5. https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > 6. mailto:[email protected] > 7. https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
