Re: [CAD_CAM_EDM_DRO] Re: Thanks all for the information on the Allen Bradley Monitor

kabowers@... wrote:

> On Sun, 13 Jun 2010 21:48:32 -0400, you wrote:
>
>
>> On Sun, 13 Jun 2010 22:17:58 -0000, you wrote:
>>
>>
>>> visit the homepage
>>> http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/
>>> and click on the new pictures on the upper lines.
>>>
>>> there is a photo of the connector.
>>>
>>> Dave
>>>
>>>
>>>
>>> --- In CAD_CAM_EDM_DRO@yahoogroups.com, Roland Jollivet <Roland.Jollivet@...> wrote:
>>>
>> Looks for all the world like an old Ball Bros. monitor like I have down in the basement.
>> Twenty-five years ago it even worked.
>>
>> I'll do a little looking around in my ancient history collection tomorrow and see if I can
>> find the documentation without getting dinosaur bit 8=). IIRC back in the 80's I had
>> the manual, or at least schematics.
>>
>> Keith Bowers WB4LSJ- Thomasville, NC
>>
>>
>>
>> ------------------------------------
>>
>>
> I finally found some connector pinout info:
>
> Ball Bros. Monitor Pinouts:
>
> 1 Horizontal Ground
> 2 One end of brightness pot
> 3 Other end of brightness pot
> 4 Wiper/Swinger of brightness pot
> 5 Arc Ground
> 6 Horizontal Drive
> 7 DC Power in 5"=>12V 9"=>15V
> 8 50 ohm video in
> 9 Vertical Drive
> 10 Vertical/Video Ground
>
> Brigntness pot may already be on PC boar

The unit I have is a Ball part # 610570-07 monitor. Video is definitely
on pin 8, with ground on pin 10.
There are twisted pairs with white wires to pins 6 and 9, and black
wires to pin 1, consistent with above.
Pins 2, 3, 4, 5 and 7 are not connected. The only brightness pot is on
the monitor.
Power is a 120 V Molex-type connector on the power transformer of the
monitor.
The video signal has a 75 Ohm terminator soldered right on the card-edge
connector.
75 Ohms is typically used for video, not 50 Ohms.

I could sell you my monitor for a few bucks plus shipping, I sort of
have a sentimental attachment to the 7320 as it is the only computer
around here with a front panel with switches and lights. But, in
reality, it is VERY unlikely it will ever run again. The video monitor
popped a diode when the system ran, but I repaired it, and it worked for
several more months until I retired it. But, I have cannibalized too
much of the rest of this system, like the BTR, so it would be somewhat
of an ordeal to load the executive tape to get a picture on the monitor
to test it. So, it would be in as-is condition.

Jon
Jon