PCB edge card find

SethS · Jan 27, 2017

This is an IBM Transistor Logic SMS Printed circuit board. Called (and looks) vintage, but don't know the exact year.

I'm not saying this is OMG the part...

But you have to admit, it's one of the closest you've seen, right? Laid out here by Roy's ESB card.

And on the back side-- TI transistors that are about the exact same size as the replicas Roman makes available.

kevin926 · Jan 27, 2017

Looks good to me. Besides, you are comparison is with a interpretation part. It may be the exact piece.

propmainiac · Jan 27, 2017

Where'd you find that?

SethS · Jan 27, 2017

Ebay. It was cheap.

There's a few more out there....

propmainiac · Jan 27, 2017

OK just bought a card with a double set of those pins for20 dollars. Both have 16 pins though judging by your card and replica card might need to shave 1 pin off.

propmainiac · Jan 27, 2017

Not exactly like yours but good for a custom saber.

roygilsing · Jan 28, 2017

SethS said:
This is an IBM Transistor Logic SMS Printed circuit board. Called (and looks) vintage, but don't know the exact year.

I'm not saying this is OMG the part...

But you have to admit, it's one of the closest you've seen, right? Laid out here by Roy's ESB card.

And on the back side-- TI transistors that are about the exact same size as the replicas Roman makes available.

http://sethmsherwood.com/pretty/pcb.jpg

Seth, this is amazing!!
I've never seen any vintage edge connector come as close as this one you found. I envy you!! I've searched for many hours, but never seen anything even remotely as close as this. Congrats! It very well could be the original. Does it work out from production year point of view?

I'm not a transistor specialist, but it would make a lot of sense!

Darth Lars · Jan 28, 2017

There are lots of cards like that out there with edge connectors with that spacing, which is a standard spacing. We have discussed vintage HP computers and Commodore 64s before.
The problem is finding an exact match. Roy's card is still closer because it has the right colour of PCB.

matty matt · Jan 28, 2017

Yeah, there are a ton of "close enough" boards out there. I don't think the color of the board is right on this one. Nice vintage piece though and certainly a good buy.

thd9791 · Jan 28, 2017

This was the closest I ever found. Nice work Seth! That shape is not necessarily common in the junk we have to dig through

towelkeeper · Jan 28, 2017

Awesome find, Seth!
I had these in my ebay bin before and decided the color was not close enough to buy one, but seeing how close they match in size and shape... I just bought two.

The only thing that's not quite right is the width of the traces. If you cut one of them down, you will see more than 13 contacts.

thd9791 said:
View attachment 701940 This was the closest I ever found. Nice work Seth! That shape is not necessarily common in the junk we have to dig through

That one is truly amazing! Have you tried cutting it down? I would have bought that one in a heartbeat, looks very close to me!

SethS · Jan 28, 2017

roygilsing said:
Seth, this is amazing!!
I've never seen any vintage edge connector come as close as this one you found. I envy you!! I've searched for many hours, but never seen anything even remotely as close as this. Congrats! It very well could be the original. Does it work out from production year point of view?

I'm not a transistor specialist, but it would make a lot of sense!

According to this site, they were used in the late 50s, to mid 60s.

http://www.chipsetc.com/ibm-international-business-machines.html

All I did was go to eBay and search "vintage circuit board" in hopes of some cool custom parts!

roygilsing · Jan 28, 2017

Ooph, somebody (here?) just snatched this one from under my nose on eBay!

SethS · Jan 28, 2017

That LIKE was for the pic, not you getting snaked.

Oh crap, I caused another mad dash didn't I?

At least this time they want call me and ask what the hell is going on like the lure tape people did...

Halliwax · Jan 28, 2017

i live for this vintage stuff :$

SethS · Jan 28, 2017

Any ideas how I can attach these transistors? Do we know how the original OBK hero did it?

matty matt · Jan 28, 2017

SethS said:
Any ideas how I can attach these transistors? Do we know how the original OBK hero did it?

No one knows. A lot of guys (myself included) drill them out and epoxy in machine screws.

TIGCreations · Jan 28, 2017

roygilsing said:
Ooph, somebody (here?) just snatched this one from under my nose on eBay!

https://uploads.tapatalk-cdn.com/20170128/89fb220d259510374e6c294d1f1ab5ba.jpg

In the same boat. Thought about getting it, but I didn't. Now I want to punch myself.

TIGCreations · Jan 28, 2017

towelkeeper said:
Awesome find, Seth!
I had these in my ebay bin before and decided the color was not close enough to buy one, but seeing how close they match in size and shape... I just bought two. The only thing that's not quite right is the width of the traces. If you cut one of them down, you will see more than 13 contacts.

That one is truly amazing! Have you tried cutting it down? I would have bought that one in a heartbeat, looks very close to me!

Can I have one of them?

AnubisGuard · Jan 28, 2017

SethS said:
Oh crap, I caused another mad dash didn't I?

Hey, be fair. The Canon Model Ys were only, like, 50% you.

PCB edge card find

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