Re: Interesting device on eBay -- CDC clock generator?

2020-01-19 Thread Chris Elmquist via cctalk
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

Re: Interesting device on eBay -- CDC clock generator?

2020-01-19 Thread Jon Elson via cctalk
On 01/17/2020 06:04 AM, Guy Dunphy via cctalk wrote: Someone wanted those coax signals to all be very precise and coincident. Now where... Oh yes, 'physics packages.' My guess - nothing to do with computers, but rather an implosion detonator for a nuke. No, they used equal length coax cables

Re: Interesting device on eBay -- CDC clock generator?

2020-01-19 Thread Brent Hilpert via cctalk
On 2020-Jan-17, at 4:04 AM, Guy Dunphy wrote: > At 02:22 AM 17/01/2020 -0800, you wrote: >> >> On 2020-Jan-17, at 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

Re: Interesting device on eBay -- CDC clock generator?

2020-01-19 Thread Guy Dunphy via cctalk
At 02:22 AM 17/01/2020 -0800, you wrote: > >On 2020-Jan-17, at 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? >> >>

Re: Interesting device on eBay -- CDC clock generator?

2020-01-19 Thread Chuck Guzis via cctalk
> 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)

Re: Interesting device on eBay -- CDC clock generator?

2020-01-19 Thread Jon Elson via cctalk
On 01/17/2020 02:11 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?

Re: Interesting device on eBay -- CDC clock generator?

2020-01-19 Thread dwight via cctalk
device on eBay -- CDC clock generator? On 2020-Jan-17, at 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? > > https://www.ebay.com

Re: Interesting device on eBay -- CDC clock generator?

2020-01-17 Thread Brent Hilpert via cctalk
On 2020-Jan-17, at 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? > >

Re: Interesting device on eBay -- CDC clock generator?

2020-01-17 Thread Paul Anderson via cctalk
I have several TEK boards like these. I thought they were delay lines to keep signals in sync. I had a friend tell me what he thought they were, but I'll have to call him to refresh me feeble memory. On Fri, Jan 17, 2020 at 2:36 AM jim stephens via cctalk < cctalk@classiccmp.org> wrote: > > > On

Re: Interesting device on eBay -- CDC clock generator?

2020-01-17 Thread jim stephens via cctalk
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?

Interesting device on eBay -- CDC clock generator?

2020-01-17 Thread William Maddox on CCTalk via cctalk
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? https://www.ebay.com/itm/Vintage-Mainframe-Computer-Part-Drum-Memory-Control-Data/312942951497