Hi Alec, Well done and thanks for the credit. I had not looked under the board for the crystal or spotted the divider. One comment. in your blog and ebay description you say that the unit runs on 15V. The "M" suffix 5650A is actually designed for a normal aircraft 28V DC supply (typical specification range 22-32V). It may run on 15V but it may be stressing the power supply circuit and / or under-running the oven. The external (28V) supply to the Marconi unit is just filtered, switched and connected to the FE-5650A without regulation. It appears that these units have options 08, 09, 22 and 25 rolled up into the "M" military suffix. By the way, these units can cost $10,000 or more each for specials see http://www.dlis.dla.mil/webflis/pub/pub_search.aspx
Robert G8RPI. ________________________________ From: Alexander Wright <[email protected]> To: Discussion of precise time and frequency measurement <[email protected]> Sent: Saturday, 20 April 2013, 2:33 Subject: Re: [time-nuts] Changing FE-5650A frequency? Success! I've managed to set mine to 10MHz. I've documented this on my blog: http://blog.m0tei.co.uk/post/2013/04/20/Mystery-Aircraft-Parts-and-Atomic-Clocks Thanks to those who offered suggestions. Regards Alec _______________________________________________ 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.
