Hi Joe, First pray there is not a bad load or short causing power supply shutdown. Most likely it is the electrolytics in the power supply going bad. These IFR's are getting old enough where that can be a problem.
73 Bernie Parker K5BP --- In [email protected], "Joe" <[EMAIL PROTECTED]> wrote: > > Hello to all, > > I recently acquired an IFR A-7550 and started to test it out this > afternoon. I removed the battery from the unit because it was dead > and I didn't want to damage the power supply. I plugged it in and > heard a squealing noise for a second or two before the fuse blew. Any > words of advice before I start digging into the power supply of this > beast? > > 73, Joe, K1ike >
