Sega Mini Cab Conversions

[FrancoB]

I've started messing with the monitor mounting but I need to confirm a couple of dimsensions of the tube before I carry on. I've measured it but I want to double check and see if Jeff has a technical drawing of the tubes.



I meant to take a photo the other day of the rust on the Dino King but I forgot so here's one now:



It's only very minor but it will still want sorting out.

I thought I would start stripping down the Dino King to remove all the unwanted parts and see how much room I have to play with.

Inside the back pre strip:



Upper shelf out. This is where I'm planning on mounting the PCBs:





I removed the lower shelf, the inside shielding, most of the wiring loom and and stripped it all down:



There sure is a hell of a lot of wiring for such a little cab and it's fairly complicated. Give me straight forward JAMMA any day

One good thing is that most of the connectors are JST VL and JST YL. I've got thousands of crimps for these so I can recycle a lot of the connectors in the conversion.

Step down out, it looks to be ~230v in and 100v out:



I think one of the PCBs steps the voltage down further for the JVS etc. I'm not 100% sure what the other PCB on the lower shelf is for.

This is the cab pretty much stripped out:





I'm going to keep all of the coin mech/speaker wiring on the front door as it is and then just interface my wiring to that.

As you can see there is a fair bit of space to play with. I tried a CPS1 board for size on the top shelf and there is bags of room:





I tried a CPS2 set up and was surprised to see that that will just fit in too:





So I definitely think I'll use the top shelf for PCBs. I'll mount the service board to the lower shelf and I'll also put an audio amp on there too. I can either use a 12v amp or something more like a standard 240v hifi amp.

The distance between the shelves is 117mm and the service panel is ~140mm tall so I'll need to trim a bit off to the top to get it to fit.





I stripped the original PSU of the board and tried the Wei-ya PSU and it looks like it will fit great, I can even use some of the original connectors on it.



More to come soon hopefully!

[sombetzki]

Very curious 'bout the end result!
This is going on my watchlist

[cools]

If you're not going to reuse the step down I'd be interested

[emphatic]

These cabs look great inside, lots of space for your needs.

[FrancoB]

If you're not going to reuse the step down I'd be interested

I should have one in both. I'll prob keep hold of one but you're welcome to the other.

These cabs look great inside, lots of space for your needs.

Thanks, I have special needs

[cools]

Ta. I'd love to get the cute and neo 19 on UK mains and those stepdowns would be ideal.

[crunchywasp]

Great project

I'll be keeping an eye on this 'un

[FrancoB]

I've been working on the monitor mounts a bit more and I think I have something sorted.

The blue outer square is the top section of the cabinet and the horizontal lines are the existing monitor mount bars. I'll chop them off as shown below, still leaving four of the tapped holes intact:



I'll then need to get a mounting plate made from ~3mm steel or ally and bolt it to what's left of the original supports.



The tube is frameless and the chassis will sit on the base of the upper section of the cabinet. I'll need to get some adapter plates made that will bolt to the monitor and allow me to mount it onto the steel mounting plate:



The monitor should then be able to be mounted both horizontally and vertically:



I'm hoping to get a prototype made from plastic shortly before I commit to getting the steel cut.

[LoRez]

Nice Anything need doing to the bezel or is that just square on the outside?

[FrancoB]

The bezel is rectangular. I'll be making two different front plastics to mount the bezel to to suit both orientations

[Paulie]

Awesome stuff Fran

[gabe]

I love these cabs, and subsequently love this thread. Excellent work thus far.

[FrancoB]

I'm glad you approve

Tweaked the mouting hardware a little so that I can get it cut it from a single sheet:



I've twisted my work mates arm and hopefully he's going to run it off for me on Thursday night. I'll be supa happy if I can try the mounting out at the weekend

I had a play with the monitor in the L&B this morning. When I installed it the yoke wires were the wrong way round. I didn't sort it at the time as you have to remove the tube from the frame to access the chassis as the tube is so tight to it. I thought I would get it sorted and after two attempts I actually got them the right way round.

I'd not tried a 31k source in them yet so I hooked the 360 up and it looks great, even with the crappy VGA cable I have. My phone cam makes them look a bit pap though.

[geotrig]

pic looks great

[andygeezer]

Looking good my man

[gargoyle67]

WoW that must have given you a boost looking at those screen shots

[TadCool]

Looking ace already, mate.

Hope you know what you're doing, 'cause there won't be enough of these little cab to supply the suddenly increased demand for them.

[EVAWINGZERO]

These are going to turn out incredible. Great work!

[crunchywasp]

[ninn]

can you please show the size of the cabs in relation to a human? I can not imagine their sizeat all.