About Video Encoders
This is the meat and potatoes of your supergun. The encoder you pick determines how well your supergun performs across the wide range of JAMMA "standards" out there. I will give you my observations on which works best and in what situations.
R2N ($63.78) - made by "c.t.h" at CrazeArcade, this is probably the cheapest board and works great! Based on AD725 and outputs composite and S-Video.
This is an easy board to work with and does not require soldering as the inputs and outputs are all attached via the screw terminals.
Power on LED (green).
High compatibility with Neo Geo MVS and Atomiswave. You could argue that S-Video from this encoder is the best you can get from a Neo (and similar to NeoBitz S-Video).
JROK (approx $75) - made by James at JROK.com, this is perhaps the most versatile board available. Based on Sony encoder and outputs composite and S-Video. Has potentiometers for RGB adjustment on-board.
NeoBitz (approx $115) - This is a new board that has component video in addition to S-Video and composite! It features a custom circuit designed by Jeff Kurtz and uses and AD724 for the S-Video and composite functions.