http://thirdpartyoffers.juno.com/TGL2141/fc/BLSrjpTFoYcXhODk8AGDq9LOgcvdgzhRzsFr84UhwUc2RFufnX3GDYZxmK0/

http://thirdpartyoffers.juno.com/TGL2141/fc/BLSrjpTFoYfEiFjPy3fhhQrgb3wPkxTiDbx6UtGnYPn0IwIzlJit219MWYI/

And Thursday 11/12 only, tickets cheap cheap cheap as chickens: $10 reg, $8 stud/snr/mil at the door (cash or check). Art on display by Jen Parker and Hilltop Artists in Residence. Pre-show music 11/14 and 11/20 by Jonathan Parker. Come be a part of this unique, intimate theatrical experience.

I've seen mil-spec versions of the 5238A shipped with a EGG 10811 clone. It is not impossible that HP would ship whatever met spec or better in a counter. But more importantly the other reason it's hard to know is that the 10544 and 10811 are 20 to 30 years old now.

The efficiency might be improved with a 10 uH choke from the final collectors to gnd. That could be accomplished without ferrite or at least with a large air gap. regards, Gerhard dk4xp

You see them in MIL-STD-1553B systems, among others. Triax is also fairly common as a connector for "shielded twisted pair".

I have done a fanout board for the Xilinx Coolrunner XC2C64 to 100 mil square pads. The small chip in the Background is the core voltage regulator, The plug fits to the Xilinx USB configuration cable. Enough to create 1pps from 100 MHz. < https://picasaweb.google.com/lh/photo/4Bpcfouj8WH0shNGIyuVUtMTjNZETYmyPJy0liipFm0?

On 12/6/19 9:10 AM, Dana Whitlow wrote: > Even without any funny business with boost converters (or whatever). those > copper wires > make a nice antenna for coupling noise from both ends (PC and USB > accessory) into > the environment inside the chamber.

Yours looks like it is from a MIL version of the 5328A with the 10811 OCXO.  Attached is the most-likely schematic, which is from the manual for the 5328AH99 TRI-SERVICE COUNTER found in Keysight  obsolete products: https://www.keysight.com/en/pd-5328AH99%3Aepsg%3Apro-pn-5328AH99/tri-service-counter?

Unit comes with a manual (you can view it on KO4BB.com or BAMA boat anchor site), one GR874 to BNC adapter, MIL accessory connector for 24V and EFC input, and IEC power cord. Crystal is a Bliley BG61A-5 (AT cut). Oscillator uses a copper oven inside glass dewar, all foamed-in-place in an aluminum box that plugs into the main chassis.