Yup various components have been run hot. Like others in this group add a fan to the heat sink. Found a way to route a wire out from the raw 5 volt supply to run a 12 volt fan. Think I took one bolt out of the heat sink to route the wire. Think I added a resistor as I did not need a lot of air to calm the heat sink down.
Definitely consider changing really stressed components they can be a bit brown and still be OK. Measure them. Good luck Regards Paul WB8TSL On Mon, Feb 7, 2011 at 11:28 AM, gonzo . <[email protected]> wrote: > > Hi all, > I just picked up an irresistibly cheap 5370A (so cheap I didn't ask if it > worked). > So far it checks out ok, but I have some questions for those of you more > familiar with this model. > > 1) The back panel heatsink (4x TO3) is sitting on 76°C (168°F). > - is this normal? > > 2) Several resistors and diodes on the A6 Power Supply Controller show sign > of excessive heat (specifically: CR1, R1 & R23). > All the A6 voltage rails are within 0.2V. > - Is this a normal sign of age or should I be looking for something that's > NQR? > > Judging by the stickers, it's probably spent it's entire life with the side > panels on the wrong sides.This may help explain the overheated components. > > cheers, > ian > > _______________________________________________ > 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.
