Atari 720 (Working on the Repro harness now)

[720fan]

not sure if this helps. here are pictures of a the speaker wiring...
this is from months ago when i actually had it pulled from my machine.. i think the zip-ties are about 4-5" apart on here based on the size of the connector.. and when i looked at the machine it is roughly 60" or so of ground the wiring has to cover to get from the audio 2 board through the access hole, behind the monitor and up into the boombox.

 

[Dokert]

I'll try to get a measurement for you as well. I have another cab here with a surprisingly nice looking harness.

Cool

not sure if this helps. here are pictures of a the speaker wiring...
this is from months ago when i actually had it pulled from my machine.. i think the zip-ties are about 4-5" apart on here based on the size of the connector.. and when i looked at the machine it is roughly 60" or so of ground the wiring has to cover to get from the audio 2 board through the access hole, behind the monitor and up into the boombox.

Looks like the Brown and White is longer than the Orange and White

 

[720fan]

yes, but there was also another wire on this that was cut and never used, so not sure if it was original or why that wire was there in the first place, you can see a part of it in the picture.
id say the brown/white side is about 12 inches longer.

 

[Dokert]

yes, but there was also another wire on this that was cut and never used, so not sure if it was original or why that wire was there in the first place, you can see a part of it in the picture.
id say the brown/white side is about 12 inches longer.

I see that odd wire, and it is not in the scat. I don't think it is supposed to be there at all.

 

[720fan]

maybe atari used these pre-made for a few games?

 

[2600]

Ok, here is what I have.

50" for Orange and White (Right Speaker)
62" for Brown and White (Left Speaker)

 

[Dokert]

Ok, here is what I have.

50" for Orange and White (Right Speaker)
62" for Brown and White (Left Speaker)

Thx

I now have two closely matching measurements for the speakers. Still searching for a med res monitor to test the harness.

 

[720fan]

here is a question...
i just thought about this, and i think that the people on this thread might be the right people ask...

for a 720, and i assume the other system 2 games... you have 110 V coming off the wall, it then goes to a splitter where separate 110 lines go to the game light on top, and the fan, and one line goes to the +5 switcher and converts to +5 for the video/cpu board, and another goes to the transformer which then sends 110 to the monitor (isolated i believe), and sends out 12.5 and 18 v to the audio board which turns it into 15v and sends back to the cpu...
my question is, with more modern power supplies as we see in newer games and pcs, would it be possible and more reliable to take 110v in, and send it from one converter/supply to the 18v, 12v, and 5v, and the 110v to the monitor, thus eliminating the 5 volt switcher and the transformer and giving more accurate power to the game to prevent issues?

just a thought...

 

[Dokert]

here is a question...
i just thought about this, and i think that the people on this thread might be the right people ask...

for a 720, and i assume the other system 2 games... you have 110 V coming off the wall, it then goes to a splitter where separate 110 lines go to the game light on top, and the fan, and one line goes to the +5 switcher and converts to +5 for the video/cpu board, and another goes to the transformer which then sends 110 to the monitor (isolated i believe), and sends out 12.5 and 18 v to the audio board which turns it into 15v and sends back to the cpu...
my question is, with more modern power supplies as we see in newer games and pcs, would it be possible and more reliable to take 110v in, and send it from one converter/supply to the 18v, 12v, and 5v, and the 110v to the monitor, thus eliminating the 5 volt switcher and the transformer and giving more accurate power to the game to prevent issues?

just a thought...

Nope, doesn't quite work like that. The transformer provides for the monitor as an iso, and the marquee, and the AC for the +5vdc switching power supply. The low voltage AC being picked off of the transformer provide +/- 15vdc and additional +5vdc for the cpu board. It also feeds the audio amp.

 

[Dokert]

Testing is complete, here is the for sale interest thread http://forums.arcade-museum.com/showthread.php?p=1491776#post1491776