Value of Big Cap in Q*Bert Transformer Block?

Phetishboy

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Bob Roberts asked me. He has a replacement for Gottlieb machines but wanted to make sure Qbert was the same value as what he has. Can anyone help me out?
 
Whoops, he didn't want the value, he wanted the physical size of the cap, ie: diameter and length. I guess what he has is the right value, but he wants to make sure it will fit in the assembly properly.
 
Well, my test rig doesnt have an original cap on it so I cant measure that. Im not pulling my qbert out from its corner. I can give you approx measurments of about 3" X 6" from memory.
Let me see if my qbert is accessible right now. I have been cleaning the basement today so I have stuff scattered everywhere right now.
 
Hi Phet,

Did you get the big Cap off of Bob? I would like to order one as well, what do i ask for?

Thanks,
 
I had one of these caps go bad once. It kept taking out the bridge rectifier and I finally narrowed the problem down to the cap. Replaced the cap and its been good to go since. I used one off a taito PS since it was close enough in value.
Also, the aluminum ring terminals sometimes get broken and you cant solder them to repair them.
 
I had one of these caps go bad once. It kept taking out the bridge rectifier and I finally narrowed the problem down to the cap. Replaced the cap and its been good to go since. I used one off a taito PS since it was close enough in value.
Also, the aluminum ring terminals sometimes get broken and you cant solder them to repair them.

I just got done swapping in the new one. I had to find the right number screws with short enough shafts and with the right (fine) threads to make the new one work, as Bob doesn't include the screws, and the old cap has solder tabs. I just desoldered the wires, then the old diode and soldered it across 2 new 'O' crimp connectors, then crimped the O connectors onto the wires, screwed them down to the proper terminals and it worked like a dream. Grounded my CPU board, removed the ground from my monitor and I STILL have interference on the monitor. I have:

-recapped the monitor
-removed the ground
-grounded the CPU
-replaced the big blue capacitor
-replaced the linear supply with the new AS switcher

and I still have interference rods scrolling thru the monitor. I give up.
 
Have you tried pulling the ground strap off the PCB's? I had interference on my QB then I removed mine and problem solved.

I just got done swapping in the new one. I had to find the right number screws with short enough shafts and with the right (fine) threads to make the new one work, as Bob doesn't include the screws, and the old cap has solder tabs. I just desoldered the wires, then the old diode and soldered it across 2 new 'O' crimp connectors, then crimped the O connectors onto the wires, screwed them down to the proper terminals and it worked like a dream. Grounded my CPU board, removed the ground from my monitor and I STILL have interference on the monitor. I have:

-recapped the monitor
-removed the ground
-grounded the CPU
-replaced the big blue capacitor
-replaced the linear supply with the new AS switcher

and I still have interference rods scrolling thru the monitor. I give up.
 
Brown and banded? If so I misspoke and it is a resistor. Anyhoo, I used the old one. I'll try pulling the ground straps off of the filter board and soundboards.

I believe you just need to remove the ground strop to the filter board.. The boards are all connected to the filter board. Just trying to save you some time for testing purposes.
 
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