Hi Rob, Thanks for the feedback.
You are right and your comment about the task on your hand in an understatement. However, us Aussies never give up. I do agree the little brick does run hot, however both units have failed in the same region and fail to lock. In particular one unit had suffered from thermal over heating of the surrounding buld housing which caused melt down of the FET heater device. I am now trying to trace out the small oscillator and heater control and feedback PCB to understand it's workings. Setting the above aside, I was sent a technical manual of the FE-5650A by Peter Vince. this may help me understand the building blocks within the brick, however no schematics. I will keep at it, some one might just read my plight. Cheers Gerald >-- Original Message -- >From: "Rob Kimberley" <[EMAIL PROTECTED]> >To: "'Discussion of precise time and frequency measurement'" > <time-nuts@febo.com> >Date: Sun, 17 Dec 2006 17:42:24 -0000 >Subject: Re: [time-nuts] Frequency Electronics FE-5650A >Reply-To: Discussion of precise time and frequency measurement > <time-nuts@febo.com> > > >FEI don't issue schematics for their products, and obviously charge for >repairs. These bricks do run hot as I remember and need plenty of sinking. >Sorry, I know this doesn't help, but I think you quite a task on your hands >trying DIY, and should consider contacting FEI www.freqelec.com > > >Rob K > >-----Original Message----- >From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On >Behalf Of Gerald Molenkamp >Sent: 17 December 2006 11:43 >To: time-nuts@febo.com >Subject: [time-nuts] Frequency Electronics FE-5650A > >Hi, > >Help needed. > >I am seeking detailed technical information "schematics if possible" for >the >FE5650A Rubidium frequency oscillator > >I have 2 units, both have failed in the same manner, and are suffering from >no lock and over heating. > >Have now spent a solid month fault finding both units, I am now desperate >for any help. > > > >Regards > >Gerald > >Melbourne Australia >_______________________________________________ >time-nuts mailing list >time-nuts@febo.com >https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > >_______________________________________________ >time-nuts mailing list >time-nuts@febo.com >https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
