I am in search for some of these edge connector’s for some circuit bending purposes.
As far as I have measured correctly, it is not the default standard as can be found for example on Aliexpress.
distance first/last pin = 91.5mm = 3.81mm pitch between each, in inches this would measure 0.150 inch
This connector is found in an old Hammond Aurora Classic organ. My intention is to add an additional set of wires for adding midi out without destroying the original wires. I was thinking about adding a small PCB in-between the original connections for this purpose.
I think that calculation of pitch is off. If it’s 91.5mm from the first pin to the last (I’m assuming you mean from the left edge of the first pin to the left edge of the last pin, here) then you pass by 23 pitches, so it’s 91.5mm / 23 = 3.98mm. Which, coincidentally, is very close to the pitch of 3.96mm used in a lot of card edge connectors. EDAC makes a lot of them, though I think they have only a 25-position, not a 24. 24-pin, but it’s 12-position double sided. Bel is the same. I think you could probably make that work, though, with a bit of filler.
So I made a stupid newbie calculation error!
I divided by 24 isof 23.
I will have a look at the URL’s, and see where I can find some matching.
There is no polarisation slot, it is just a missing pin. The pin position matches the bus-bar wire on th e PCB which is only needed once in the connector. The PCB is made symmetrical and there is an unused bus-wire left.
That’s called a “fence-post error” in computer programming, easy to do when counting up for-loops.
Great that @smolwaffle spotted the real answer hiding in there.
It’s a mistake I’ve made a lot of times myself. After programming for 20 years, though, I’m finally getting to the point where I spot it more often than not.
Another thought about locating a connector: have you tried going to Hammond Organ forums (are there said?) and asking for connectors that could be used to repair that cable? They might have a sense for what’s best used there and whether/which EDAC connectors work.
Thanks for the responses. I ordered a set with the correct pitch (hopefully), but with a bit more pins. So need to to some customisations, but that’s fine.
0.156" pitch. Same as JAMMA in video arcade machines. JAMMA is 28 pins, double sided. There are adapter / breakout PCBs for them really cheap, with or without location 7 out as key.
Cut one down to 26 positions long and use the solder holes for one side. No need to fabricate something from scratch. I Saw one on eBay for under $5 with edge connections on two sides, one keyed, the other with all positions and a double row of solder holes in the center.
Interesting!
That’s seem close to what I am looking for.
I am not sure if I can find the exact breakout version you pointed to. I found this one which comes close, pcb after pin24 matches my pcb size:
The ordered connectors are delivered, it looks the pitch is correct.
I guess I need to fabric a custom interface board as the Jammy’s seem to differ slightly.
