Manfred, The 05328-20027 part number is the HP part number for the bare PCB used in the A3 assembly 05328-60027 interface board. You can find the schematic for that assembly in the manual for the militarized version of the 5328A (AN/USM-459) at [ https://radionerds.com/images/9/9a/TM_11-6625-2941-14%26P.PDF | https://radionerds.com/images/9/9a/TM_11-6625-2941-14%26P.PDF ] and the associated manual [ https://www.liberatedmanuals.com/TM-11-6625-2941-24P.pdf. | https://www.liberatedmanuals.com/TM-11-6625-2941-24P.pdf. ] .
Cheers, Dave M From: "Manfred Bartz" <vk3...@gmail.com> To: "Discussion of precise time and frequency measurement" <time-nuts@lists.febo.com> Sent: Wednesday, September 2, 2020 12:24:21 AM Subject: [time-nuts] HP-10811AB-OCXO interface questions Hi all, I bought 2 x 10811 OCXOs for a 10MHz GPSDO project I am working on. The OCXOs came with an interface board HP 05328-20027, see attached pictures. Questions: 1. Is it worth keeping the interface board? a. If yes, does anyone have the schematic and the data on the ICs? b. What is that TO220 device? and c. why is it mounted on a standoff on the back of the PCB? 2. Any advice/caution on matching the OCXO output impedance? 3. Any recommendation for a (>= 4-ch) distribution amplifier? 4. Any advice on a low jitter comparator for further digital processing, e.g. for a 1pps signal? Thanks and 73 -- Manfred VK3AES _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.