2.1mm Barrels versus 2.5mm:

FBX

Quiz Detective
Joined
Aug 7, 2017
Posts
89
I've been attempting to write the most concise guide I can for AES power supplies, but I noticed mentions that NEO-POW3 uses a 2.5mm center diameter, meanwhile the older PRO-POW uses 2.1mm. Here's my guide thus far:

http://www.firebrandx.com/aespsuguide.html

Can anyone that has both adapters take a photo of both barrels next to each other, looking straight down the top of them? I need to get this last nebulous part sussed out. I've had people tell me the 2.1mm Triad PSU I suggest works fine on their 9V machines.

Cheers and thanks!
 

FBX

Quiz Detective
Joined
Aug 7, 2017
Posts
89
Had someone confirm 2.1mm works perfectly fine for NEO-POW3 consoles, so I've updated my guide to exclusively use 2.1mm center pin diameter. Better to have a snug fit than a loose one.

Edit: Also had someone confirm the NEO-POW3 itself is in fact a 2.1mm center diameter barrel. So that's another myth we can dispel here, unless by chance the 'other version' is 2.5mm, but I seriously doubt that's the case.

neogeoaespsuguide-07.png
 
Last edited:

Xian Xi

JammaNationX,
15 Year Member
Joined
Dec 1, 2005
Posts
27,748
Consoles are 2.1mm, most newer power supplies will have this thing in the top to accommodate both 2.1 and 2.5mm sockets. I used to sell polarity changers which were 2.5mm females to 2.1mm males
 
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