Babcock SP-252 Data Sheet

[Richard Scales]

Hello everyone,

I am seeking data on the pin locations for the Babcock (Sperry, Beckman) SP-252 Panaplex display.

There is data over at tube-tester.com though the image of the pin locations is not that clear and I was wondering whether anybody had any clearer information?

They do not feature in the Sperry 'Information Displays and Accessories' catalogue from 1973 - which I already have.

.... or do I just need better glasses ?!?!

- Richard

[J Forbes]

I doubt that better glasses will help a lot, the image is so small. Resizing it gives you the info that is available in the image, which should be enough to get you what you need to know. If you have the part in hand, you can measure the dimensions that are unclear?

[Richard Scales]

Thank you - having focussed as closely as possible on the data - I have mapped out the tube positions and am assessing the feasibility of making some kind of socket.

Workings suggest that the closest any two pins get is 90mil - that's all fine on the PCB.

The pin sockets I have are 70mil at the widest - so - that plenty of clearance.

The picture is really bad but confirms my measurements - we are good to go!

 - Richard

[Audrey]

place the display pins-down on a flatbed scanner and scan the display, you can measure positions using DPI and pixels

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[David Forbes]

I have read much more garbled schematics. Zoom! Enhance! But seriously, print it out on a big piece of paper and it should be more obvious. Trace over the broken lines to see which one goes where. Make your own CAD layout, print it actual size, poke the device pins through it on some foam to verify. 

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