It’s been an absolute age since I last posted anything on the progress of these cabs. They are up and running although I have a couple of little questions to ask before I actually start playing on them (Safety first) but I’ll wait until I get to the relevant part of the write up before asking anything as I have lots of photos
You get two shelves in these cabs, a rather generous top one and a smaller lower one.
I had originally thought I would lay the internals out like in the the SNK SC19-4 cabs with the psu and service panel to the front of the base and the shelves could both be used for PCB’s. But space was a little tight in the base due to a metal plate which is welded in place also the service panel would have required a lot of modification to fit. I could of course have gotten around these issues but I felt that mounting the service panel on the bottom shelf and knocking up a new MDF base for the XFMR and JAMMA switching PSU like in Franco’s project was the better option.
The service panel is too tall to be mounted on the lower shelf without any modification as it was originally sited on the roomier top shelf. Fortunately it only needs the top trimming off so it’s a really quick job.
My first question: Is there any benefit to cutting down the rest of the shielding and putting it all back albeit on the lower shelf now that he original hardware has been ripped out? The only thing that will now be on the lower shelf is the service panel. I’m sure the answer will be no but I’ve kept all the bits and bobs just in case. This isn’t an how to guide but nevertheless I don’t want people to stumble across my thread and be misinformed.
Top shelf, this is how it was when I got the cab complete with service panel and shielding
Service panel marked up, really to be cut down
Cut to size
Burs removed and the protective plastic strip reapplied
The cab is rammed full of cable clips which will make it all neat and tidy when it comes to adding the wiring but not all of them are needed. I’ll probably make new shelves if ever I have a spare bit of 12mm MDF. There’s nothing wrong with these ones but they have a few holes from the mounting of the original hardware, so why not.
I left just 2 cable clips on the lower shelf
I removed them all from the top ‘PCB’ shelf. As you can see it’s a decent sized bit of real estate for such a small cab.
Both my cabs had a XFMR to step the voltage down for the monitor, but no wiring for a traditional switching JAMMA power supply. The first thing I needed to do was to knock up a new MDF base to mount the existing XFMR and a new PSU. I had a left over scrap of MDF in the garage, it’s thicker than the original and it’s been knocked about so it has some slight splitting down one side, (I'm picky and it really is something and nothing) it doesn't matter about the depth but again I'm picky so I’ll make a perfect replacement when I pick up an off cut. I’ll get my router out for the edges too just to make it extra nice but I couldn't be bothered to do that for these ‘temporary’ ones. The new base is just a simple ‘L’ shape. If you use the original as a template then you already have the perfect placement for all of the necessary holes. Use a forstner bit to drill larger holes on the reverse in order to mount the threaded hardware to the correct depth. The XMFR MDF base originally comes with Claw nuts and the front card dispenser MDF mounting base (which is also not required) originally comes with barbed inserts
so take your pick which to re-purpose, they both do the same job. Just poke them out with an old screwdriver and tap them into the new one. Use a pair of pliers to hold an old sturdy bolt and use that to tap the hardware into position, don’t hold the bolt without the pliers, if the bolt slips and you **** your finger it WILL hurt!
The original
The new mounting plate marked up, I got two out of this off cut
XFMR and new PSU mounted in position
Underside
New base Installed in the cab, rear view
And front view
Shelves and service panel installed, rear view. As you can see plenty of space on that top shelf
and front view
If you are wondering what's that on the base of the cab, then it’s this handy little table. So I can quickly cross reference the JAMMA harness, when I come to install it.
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