Converting edge connecter mono audio to rca line out

OldFoo · Post by **OldFoo** » Sun Apr 15, 2007 2:42 am

Hey, does anyone have a schematic they would like to share that converts mono audio to stereo line level outputs for a supergun? Helping a buddy of mine set one up for Naomi use as well as older Jamma boards. Thanks for all the help.

OldFoo · Post by **OldFoo** » Sun Apr 15, 2007 2:54 am

You can use one of these --->Audio Converter<---.

Connect the + and - to both left and right inputs on the adapter and it will output to line level mono audio. I've done it and it works great. :smt020

OldFoo · Post by **OldFoo** » Sun Apr 15, 2007 2:59 am

joshua3dg wrote:You can use one of these --->Audio Converter<---.

Connect the + and - to both left and right inputs on the adapter and it will output to line level mono audio. I've done it and it works great. :smt020

Kewl, thanks man. :smt020

OldFoo · Post by **OldFoo** » Fri Apr 20, 2007 5:23 pm

Does anyone use an Attenuation circuit to drop down the mono speaker voltage to line level output? If so, is there any degradation in sound quality? Thanks.

OldFoo · Post by **OldFoo** » Fri Apr 20, 2007 7:40 pm

The converter I previously mentioned does the following:

1) Attenuates via variable resistors

2) Matches the difference in circuit loads via transformers

3) Provides the correct connectors for both line and audio level

This is better than attenuation alone. If you don't understand

what any of that means, that's ok. Just take my word for it.:smt045

:smt020

OldFoo · Post by **OldFoo** » Fri Apr 20, 2007 7:49 pm

joshua3dg wrote:The converter I previously mentioned does the following:

1) Attenuates via variable resistors

2) Matches the difference in circuit loads via transformers

3) Provides the correct connectors for both line and audio level

This is better than attenuation alone. If you don't understand

what any of that means, that's ok. Just take my word for it.:smt045

:smt020

I follow it completely, used to work as test tech, and thought about building a proper circuit design. Just taking cues from "other" consolized arcade systems. For the price, save me some trouble building the sucker. Thanks again Josh.

OldFoo · Post by **OldFoo** » Sat Apr 21, 2007 11:40 pm

this is how I did it when I would build superguns

OldFoo · Post by **OldFoo** » Tue Apr 24, 2007 8:00 am

ngt wrote:this is how I did it when I would build superguns

That's what I did.

You just have to make sure that the volume on the JAMMA boards is set to minimum to start, then increase it till you get a reasonable level, before wacking the amp up!

OldFoo · Post by **OldFoo** » Tue Apr 24, 2007 8:55 pm

dj_johnnyg wrote:

You just have to make sure that the volume on the JAMMA boards is set to minimum to start, then increase it till you get a reasonable level, before wacking the amp up!

I'm going to assume overload the inputs on the amplifier. Thanks for the advice.