Hi I'd suggest lurking on the usual sites for a cheap TBolt. It will give you a *much* better pps to compare to and you can do some amazing things with Lady Heather.
Bob -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Tom Miller Sent: Friday, January 13, 2012 1:19 AM To: [email protected] Subject: Re: [time-nuts] FE-5680A PPS on pin 6 (or not) Hello Group, I have been lurking for a while to get a feel for the group and hope to give back something in return for all the good information found so far. I have two of the FE-5680A units from the usual source. They both worked and were much less than 1 Hz off compared to a Trak Microwave GPSDRb house clock. Can't say this is not one of the treasures found in modern surplus sources. I made one observation about the 1 PPS signal. It is not present until the unit achieves lock. The 10 MHz signal is there at power up. I would be interested in using a vanilla GPS receiver that has the 1 PPS signal to sync up the Rb clock so I am following those threads. Thanks much, Tom ------------------------------ Message: 2 Date: Thu, 12 Jan 2012 03:23:00 +0100 From: EB4APL <[email protected]> To: [email protected] Subject: Re: [time-nuts] FE-5680A PPS on pin 6 (or not) Message-ID: <[email protected]> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Hi, I'm interested in seen those photos, because I collected a bunch of then from various owners but I dont see this 'AC161 even on in the switching regulator pair. I made a goof the other day when I connected the 5 V input to a 15 V power supply and toasted the 'ACT240 buffer which drives the lock indicator and the PPS outputs. I know that the 5 V is used to generate the +3.3 V in an internal regulator and because I'm not sure what else is toasted I want to trace this voltage and see if it is ok. The unit is mostly working, it locks and also generates the 1PPS, measured at the input pin of the buffer, but I want to check everything that can be damaged and replace the failed parts. So I'll benefit from partial schematics, parts location and identifications and all the like. Please share the info that you have. Best regards, Ignacio, EB4APL _______________________________________________ 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.
