itsmedario
Student
Sent you a message, hope we can find a resolution.
MiSTercade V2
- Thread starter misteraddons
- Start date
itsmedario
Student
My understanding is that MS8/9 work perfectly fine. Folks with Blast Citiy cabs are having issues.
I spoke to Porkshop yesterday and he’s going to send me a replacement board with a new solution to test, I’ll
I'm pretty sure people with MS8s are having the most problems.
Blast Cities are easily worked around by using the VGA input on the monitor.
MS9s seem improved by removing the resistors.
misteraddons
Professional
I'm working with @Astro_jamma to see if I can figure out the issue some users are having with the video quality. I've done extensive testing and can't really see what others are seeing. So far, it seems to mostly affect Blast City cabinets, but some issues with MS8-29 chassis as well.
I've only heard from a few users here, so if people don't report issues I can't troubleshoot them. No known video issues to my knowledge with MiSTercade V1, other than complaints that it's too bright. I aim for 3.3V video levels on my arcade designs.
I've only heard from a few users here, so if people don't report issues I can't troubleshoot them. No known video issues to my knowledge with MiSTercade V1, other than complaints that it's too bright. I aim for 3.3V video levels on my arcade designs.
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Tonybolony
Professional
Any news on how i can get a mister in the UK please ?
or try a forwarder maybeI wish I had seen this thread before ordering a MiSTercade v2 for my Astro City w/MS8. It should show up in the next couple of days and now I'm concerned the video will be messed up.
Is there anyone here using an Astro City with the MS8 chassis who isn't having issues with the v2 MiSTercade?
Is there anyone here using an Astro City with the MS8 chassis who isn't having issues with the v2 MiSTercade?
Mistercade is an awesome project wich I love but there are issues on jamma rgb out! Not only on MS8 and 2930 ! And not only the V2, I have two V1 and not perform at same level of a genuine jamma ! The signal is not cristal clear eaven on MS9! The analog port is just perfect ! The jamma is not. I hope you adress this soon
advans14
Professional
Are you saying the v1 over jamma is not fine? I have the v1 and it looks great on both my 2930’s
That's really strange you all are getting these issues. I run my mistercade V1 and V2 on both MS9 and MS8's and the only issue I had was with the V2's lower brightness output. after removing the resistors that were mentioned, everything has been great.
ShootTheCore
Legendary
Same here. I've used MiSTercade V1 & V2 on a variety of chassis & tubes (WG7000 series, MS8, MS9, Toshiba) without any obvious issues.
astro_zombie138
Champion
V1 has been perfect in my experience. Multiple k7000's, ms8, multiple ms9's and consumer sets via supergun. Only issue I had was with the v2 specifically on an ms8.
I have the V2, no issues on my K7000 (it looks great), but I can definitely see substantial ringing on my MS8-29 which is the cabinet I bought it for. I reached out to MisterAddons and he's working on a solution right now.
Gonna try this solutionFor fixing the image, I was on the right path in terms of pulling down the voltage. What I didn't need was the low pass filter though.
Turns out, the Astro's MS8 (and maybe MS9?) monitor doesn't like higher voltage boards. Makes areas of high contrast bleed and ghost.
I was getting the same issue with the mistercade as well. The solution is to add 270 ohm resistors in series to the RGB lines, and a 680-750 ohm resistor in series to the H-sync line. This lowers the voltage on the RGBS lines to levels that the MS8 is ok with. 0.7V RGB and -0.3V Csync in the mistercade's case.
So I made a little adapter that adds those resistors. You can get the parts on ebay easy.
misteraddons
Professional
Problem solved! This should have occurred to me sooner, but I wasn't able to reproduce the visual noise issue on my MS8-29 chassis.
Solution:
Replace these 4 resistors with 220 ohm 0402 resistors.
Background:
MiSTercade V2 has a slightly modified video amplifier stage compared to V1.3. The RGB pots act as feedback trim resistors instead of termination trim resistors on the output. When users reported the VGA output was cleaner than the JAMMA output on their cabinet, it narrowed the issue down to the amplifiers stage themselves (Which aren't part of the VGA signal path). I sent 3 modified PCBs to @Astro_jamma. These were marginally better but the issue persisted. A kind soul named Scott emailed me and pointed me to this forum post, which suggests adding series resistance to the amplifier output. Thankfully, I left myself an escape when I designed the video stage by putting 0 ohm resistors between the amplifier output and the JAMMA RGBS pins. I replaced these resistors with 220 ohm resistors and sent the 4th modified board to Astro_Jamma, who tested it today and reported that it eliminated the issue.
What's different about MS8 chassis compared to MS9 or others? I don't know. This modification either limits the current of the video signals, or tunes a low pass filter on the chassis side. Either way, it works and will be rolled into MiSTercade V2.1.
This fix also explains why MiSTercade VS and V1.3 need a small tweak to the RGB potentiometers on some monitors.
I'm happy to do this repair for free for customers (just email me on my site for assistance). Not sure how to work out international shipping - hopefully there's a better solution for non-US customers who experience the issue.
For those who want to DIY, 4 of these will do the trick. Just make sure you have a steady hand, or hot air, or both: https://www.digikey.com/en/products/detail/yageo/RC0402JR-07220RL/726442
Sorry for not catching this earlier. I didn't see it (and still can't) on my test cabinets.
Solution:
Replace these 4 resistors with 220 ohm 0402 resistors.
Background:
MiSTercade V2 has a slightly modified video amplifier stage compared to V1.3. The RGB pots act as feedback trim resistors instead of termination trim resistors on the output. When users reported the VGA output was cleaner than the JAMMA output on their cabinet, it narrowed the issue down to the amplifiers stage themselves (Which aren't part of the VGA signal path). I sent 3 modified PCBs to @Astro_jamma. These were marginally better but the issue persisted. A kind soul named Scott emailed me and pointed me to this forum post, which suggests adding series resistance to the amplifier output. Thankfully, I left myself an escape when I designed the video stage by putting 0 ohm resistors between the amplifier output and the JAMMA RGBS pins. I replaced these resistors with 220 ohm resistors and sent the 4th modified board to Astro_Jamma, who tested it today and reported that it eliminated the issue.
What's different about MS8 chassis compared to MS9 or others? I don't know. This modification either limits the current of the video signals, or tunes a low pass filter on the chassis side. Either way, it works and will be rolled into MiSTercade V2.1.
This fix also explains why MiSTercade VS and V1.3 need a small tweak to the RGB potentiometers on some monitors.
I'm happy to do this repair for free for customers (just email me on my site for assistance). Not sure how to work out international shipping - hopefully there's a better solution for non-US customers who experience the issue.
For those who want to DIY, 4 of these will do the trick. Just make sure you have a steady hand, or hot air, or both: https://www.digikey.com/en/products/detail/yageo/RC0402JR-07220RL/726442
Sorry for not catching this earlier. I didn't see it (and still can't) on my test cabinets.
And for mistercade v1? any solution?Problem solved! This should have occurred to me sooner, but I wasn't able to reproduce the visual noise issue on my MS8-29 chassis.
Solution:
Replace these 4 resistors with 220 ohm 0402 resistors.
Background:
MiSTercade V2 has a slightly modified video amplifier stage compared to V1.3. The RGB pots act as feedback trim resistors instead of termination trim resistors on the output. When users reported the VGA output was cleaner than the JAMMA output on their cabinet, it narrowed the issue down to the amplifiers stage themselves (Which aren't part of the VGA signal path). I sent 3 modified PCBs to @Astro_jamma. These were marginally better but the issue persisted. A kind soul named Scott emailed me and pointed me to this forum post, which suggests adding series resistance to the amplifier output. Thankfully, I left myself an escape when I designed the video stage by putting 0 ohm resistors between the amplifier output and the JAMMA RGBS pins. I replaced these resistors with 220 ohm resistors and sent the 4th modified board to Astro_Jamma, who tested it today and reported that it eliminated the issue.
What's different about MS8 chassis compared to MS9 or others? I don't know. This modification either limits the current of the video signals, or tunes a low pass filter on the chassis side. Either way, it works and will be rolled into MiSTercade V2.1.
This fix also explains why MiSTercade VS and V1.3 need a small tweak to the RGB potentiometers on some monitors.
I'm happy to do this repair for free for customers (just email me on my site for assistance). Not sure how to work out international shipping - hopefully there's a better solution for non-US customers who experience the issue.
For those who want to DIY, 4 of these will do the trick. Just make sure you have a steady hand, or hot air, or both: https://www.digikey.com/en/products/detail/yageo/RC0402JR-07220RL/726442
Sorry for not catching this earlier. I didn't see it (and still can't) on my test cabinets.
Awesome! I'll get 2.1 as soon as it's available on your website!
May I suggest you look for an EU distributor for your products? You created a very good ecosystem and it's a pity for us in EU to pay customs and have potential issues with customer care.
May I suggest you look for an EU distributor for your products? You created a very good ecosystem and it's a pity for us in EU to pay customs and have potential issues with customer care.
misteraddons
Professional
Thank you! Sadly, there's no getting around customs. Someone has to pay them, whether it's the reseller or the customer. I'll keep looking into solutions but I don't have anything immediate.