Jamma Extender

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retrogamingjohnny
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Jamma Extender

Post by retrogamingjohnny »

Hey guy how's it going? I think I am in the right board, but if not, kindly point the right way. Today I got my hands dirty. I decided to make a jamma extender. I was thinking about buying a Jamma extender for some time for many reasons. One reason is that the boards and my supergun are never at the same height when I connect them and always have to put something underneath the supergun to keep them even. The other reason is the cover on my supergun gets in the way and I can't connect the boards unless I remove the lid and defeats the purpose of having a protector for the supergun. So the solution is get a jamma extender. I was looking at ebay today, and it costs $14 including shipping. While it's not a lot, I just thought that I have this pile of junk taking up space. It was from an old arcade cabinet and it's a good thing that I still have it.
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Looking at it, I got everything I need to make one so I can't justify buying one.
Therefore I begun...
I started by cutting all wires to the same length. I used a ruler and marker to make sure they are all the same length. It didn't need to be long and I don't have that much wire, so I made it short.
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I used a clip to hold the wire in place so I could hold the solder in one hand the gun in the other. Later I didn't use the clip. I simply put solder in the board first then place the wire on it then heat it again.
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I did the first and last wires first to make sure it won't end up uneven in case some wires are longer than others. It took me a while because I was cutting one wire at a time then solder it and repeat. Then I decided to cut them all, twist them and solder them all, which was a lot faster.
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So here is the end product
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I kept it simple. I didn't put the heat sleeves and there are a couple of wires that aren't really necessary, but I put it anyways. It doesn't hurt.
I rechecked the position of the wires to make sure they are in the right place and not switching place with any onther.
Here it is connect to the supergun
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I couldn't push it all the way, but it doesn't matter.
Testing and...Wualah!
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It works perfectly. The lines on the image are because it was taken from the CRT.
So that was my quick (although no so quick) and easy project today. It won't win a beauty contest, but it works and it saved me 14 bucks. And the best part is that I got my hands dirty, something that I made myself. Comments?
Last edited by retrogamingjohnny on Thu Jul 10, 2014 2:40 am, edited 1 time in total.
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system11
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Re: I got my hands dirty...

Post by system11 »

Yeah, don't plug anything expensive in with that.

You need thicker guage wire for the +5/GND wires, all the wires are stripped too far back, need to heat shrink the connector side properly. It's going to get very fragile over time so be careful.

There's always a next time ;)
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emphatic
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Re: I got my hands dirty...

Post by emphatic »

system11 wrote:There's always a next time ;)
Unless he blows himself up! :lol:
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retrogamingjohnny
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Re: I got my hands dirty...

Post by retrogamingjohnny »

system11 wrote:Yeah, don't plug anything expensive in with that.

You need thicker guage wire for the +5/GND wires, all the wires are stripped too far back, need to heat shrink the connector side properly. It's going to get very fragile over time so be careful.

There's always a next time ;)
Ok. Good to know. I'll improve it before using again. Can't get it perfect the first time.
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dpful
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Re: Jamma Extender

Post by dpful »

You could stabilize all those ends in a sheath of hot glue.
It's a very good idea to get that slack, and get the weight off the boards.
retrogamingjohnny
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Re: Jamma Extender

Post by retrogamingjohnny »

dpful wrote:You could stabilize all those ends in a sheath of hot glue.
It's a very good idea to get that slack, and get the weight off the boards.
.

I like the hot glue idea. I was thinking of a heat shrink alternative, but it didn't come to me yet.
retrogamingjohnny
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Re: Jamma Extender

Post by retrogamingjohnny »

I re did the whole extender from scratch. I gave it some more lenght for flexibility, added heat shrink, and made the solder points as short as possible. Also, connections that are non essential are omitted.

Image

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brokenhalo
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Re: Jamma Extender

Post by brokenhalo »

Looks like a big improvement. Good job! Just grab 2 or 3 zip ties and bundle that wire up a bit and you'll be perfect.
retrogamingjohnny
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Re: Jamma Extender

Post by retrogamingjohnny »

brokenhalo wrote:Looks like a big improvement. Good job! Just grab 2 or 3 zip ties and bundle that wire up a bit and you'll be perfect.
Thanks. :D . I like it loose. It's just a personal preference.
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