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

[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?
> 
> https://www.ebay.com/itm/Vintage-Mainframe-Computer-Part-Drum-Memory-Control-Data/312942951497


The circumferential wire bundles feed two-stage transistor amplifiers that 
drive toward the center, then drop down to the interior board through inductors 
and then feed back toward the circumference near the coax connectors.

It looks like one of the coax connectors (J26) is out of regular angular 
displacement from the others.
I'm wondering if it could be some sort of rotating / multi-phase modulator. An 
RF carrier injected on the odd-one-out coax connector, modulated or switched in 
a rotating sequence via the circle of drivers, out to the circle of coax 
connectors.
Sheer guess as I've never seen one, but perhaps for a VOR station, to set up 
the (electronically-generated) rotating beacon, the coax connectors would feed 
out to RF amps and a circle of antenna segments.

It looks a little too engineered to be for a lab experiment.

Date codes 1980-1982.

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

[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 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?
> >
> >
> https://www.ebay.com/itm/Vintage-Mainframe-Computer-Part-Drum-Memory-Control-Data/312942951497
> >
> >
> This board from the same vendor has a test point marked DISCH on it,
> maybe part of same subsystem if the guy is repeating info that is close
> to accurate.
>
> Vintage-CONTROL-DATA-Computer-Module-PCB-196Os/
> <
> https://www.ebay.com/itm/Vintage-CONTROL-DATA-Computer-Module-PCB-196Os/283730399441
> >
> https://www.ebay.com/itm/283730399441
> <
> https://www.ebay.com/itm/Vintage-CONTROL-DATA-Computer-Module-PCB-196Os/283730399441
> >
>
> of course the seller admits to no idea what he has, so who know about
> this and the other two "Univac" boards he has.
>
> Interesting though.
> thanks
> Jim
>

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

[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?


https://www.ebay.com/itm/Vintage-Mainframe-Computer-Part-Drum-Memory-Control-Data/312942951497 



This board from the same vendor has a test point marked DISCH on it, 
maybe part of same subsystem if the guy is repeating info that is close 
to accurate.


Vintage-CONTROL-DATA-Computer-Module-PCB-196Os/ 

https://www.ebay.com/itm/283730399441 



of course the seller admits to no idea what he has, so who know about 
this and the other two "Univac" boards he has.


Interesting though.
thanks
Jim

Interesting device on eBay -- CDC clock generator?

[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