Unfortunately, I have not seen such a drum. The device in question though really looks RF-ish to me. The feedthrough caps suggest DC control voltages that might bias the diodes to switch any port to the center and then there’s some matching going on with the meandering inductor on the PCB and the caps at the center. Maybe some kind of radio direction finder (RDF) gizmo??
Seller is here in MN so CDC and Univac ties are a good possibility but we also had a large presence of the MIL avionics outfits like Honeywell, LockMart, GD, etc. in the day. Chris -- Chris Elmquist > On Jan 19, 2020, at 1:18 PM, Chuck Guzis via cctalk <cctalk@classiccmp.org> > wrote: > > >>> On 1/17/2020 12:11 AM, William Maddox on CCTalk via cctalk wrote: >>> The seller thinks this may be a drum memory, but it is clearly not. >>> My guess is that it is some kind of clock generator. Anyone recognize >>> this? > > One candidate is the high-speed drum from the STAR (early Cyber 200's) > MCU. Having seen only the outside of the drum unit, I can't say for > certain. Perhaps Chris Elmquist has seen the innards of one. > > --Chuck
