(Topic ID: 157520)

Replacement 8 Circuit Connectors

By ChanceKJ

4 years ago

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  • 23 posts
  • 8 Pinsiders participating
  • Latest reply 2 days ago by femto
  • Topic is favorited by 1 Pinsider


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#1 4 years ago

I've recently got myself into a 1978 Playmatic Chance, (something I couldn't pass up, as "Chance" is my first name).

I'm in the middle of getting everything back up into working condition and I've run into a little wall with some connectors in the box.

I'm looking for a modern replacement, doesn't have to be exactly the same pins and connector, but something that will fit. I can always cut and crimp on new pins. Looks to be 0.2 on center, 8 and 10 circuit. Doesn't need to have that "key" on one end. Anyone have any ideas?


#2 4 years ago

I would contact Digikey with a photo if you can't find one on their site.
This one looks like it could work: http://www.digikey.com/product-detail/en/sullins-connector-solutions/PPTC101LFBN-RC/S7008-ND/810149

#3 4 years ago

wow those look like a pain in the dick! if they 3.96mm spaced. Something like this should work even though they are intended to PCB mount.


#4 4 years ago

Almost looks like you could use Molex "KK" series in the .156" size to me.


#5 4 years ago

Are there any manufacturer part markings on the part at all? A logo or anything?
How about a pix looking into connector? Round pins on board?
Can you get an accurate measurement of pin-to-pin spacing using a micrometer?

#6 4 years ago

Haha! Yep, starting to be a pain in the dick for sure.

Nope no markings at all. I took a few more pics of one of the connectors and its header. Let me know what you guys think.

Plan A: replace the connector
Plan B: replace the header so I can use a different connector.

I'd rather not use Plan B, it seems like it's asking for trouble.




#7 4 years ago

Here is a wild idea... Use 0.1" headers and pull every other pin out. Then you can use normal 0.1" housing and crimp contacts. Just maybe be careful with high current pins.

#9 4 years ago

OK -- those appear to be 5mm spacing.
One more question -- what is the diameter of the pin? 1.54mm?

Ken's link is close but there is a series that has all the contacts at 5mm centers.

#10 4 years ago

Measure outside to outside minus the diameter of a pin gives you distance center to center.

Alternately, inside to inside plus pin diameter. Check both ways to verify your measurements.

#11 4 years ago

Pins are approximately 0.06" in diameter, and approximately 0.260" long. I say approximately because it's a bit hard to get the digital caliper in there to measure.

I've taken a better look around the cab, primarily I need 8 Circuit connectors, a few 6 Circuit, a couple of 7 and even 2 Circuit. There's one 6 Circuit one that has a larger gap in the middle between the 2 sets of three.

Major priority is still the dozen 8 circuit ones.

#12 4 years ago

Anyone realistically think that they could fabricate something with a 3D printer using a more standard molex pin?

#13 4 years ago

Molex SPOX series connectors could possibly work, they do have some at 5.08mm/.2" pitch dunno for sure though.

Any chance you can get a measurement from pin 1 to pin 8, instead of from pin 1 to pin 2? Would help get a bit more accurate measurement of the pitch since there's a couple sizes that are REALLY close.

#14 4 years ago

1.55mm (0.062") pins with 5mm spacing is what I was guessing. But as the last poster stated, get an overall length of the longest connector on the board to see if this is really 5mm or 0.2" spacing (measure center of pin on one end to center of pin on the opposite end of connector).

For 1.55mm pins with 5mm spacing - my 'oddball' connector source has a version that goes to 6 pins in length only. But these would not look at all like what you have now - see link Ken posted for a similar connector (10/5 mm spacing).

For 0.2" pin spacing - all I can find are square pins. Available up to 20 pins long (like Molex SPOX). Again, these won't look like what you have now - these would look more like standard 0.156" plugs used nearly everywhere.

The problem with both of these alternatives - they are both much thicker than what you are using now. I'm sure the silkscreens would be partially covered and hopefully no interference with nearby resistors. Can you get any pins out without mangling it or the connector? I have a source that makes hundreds of crimp contact varieties, maybe we can find a close match.

#16 4 years ago
Quoted from ChanceKJ:

Pins are approximately 0.06" in diameter, and approximately 0.260" long. I say approximately because it's a bit hard to get the digital caliper in there to measure.

Are you using the "back" end of your dial calipers to measure the pin height?


#17 4 years ago

I am. It's still awkward to get in beside the pin with how it's arranged to n it's spot. I'm gonna pull that PCB out soon because I'm starting to think I'll need to put new headers on it anyways.

What do you guys think for those molex parts I listed above? I'm thinking the next step is to order what I need of those from mouser and see if the headers will be a good replacement. Actually, I might just pull the PCB and compare it to the drawing on molex.com

2 years later
#18 1 year ago

How did you go with this?

1 week later
#19 1 year ago

Still nothing.

I can't find any decent pricing for a similar Molex KK series header that's being discontinued. and I'm investigating 3D printing new ones. A buddy of mine just picked up a really particular 3D printer in order to print large molex connectors for his Nintendo Red Tent, so I might go that route.

1 month later
#20 1 year ago

Thanks for that. I am working on a Sonic Night Fever which uses the same boardset as the Playmatic. My machine has all the wires soldered to the boards and I need to remove boards for repair/fault finding. Waiting patiently for a reasonable solution.

1 year later
#21 34 days ago

My buddy just finished with desoldering all the wires from the boards of my dead project Chance. He found substitute connectors at Great Plains, and today we turned it on for the first time. It booted up and is working minus sound and some switches! If you guys need more info on what connectors he used let me know and I'll see if I can get him to give me the list.

#22 33 days ago

Yeah... I would like to know what worked on that one.

1 month later
#23 2 days ago

A list of what was used would be good.

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