(Topic ID: 326250)

Which replacement SDB do you prefer and why?

By Chico

8 days ago


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  • 11 posts
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  • Latest reply 3 days ago by frunch
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    #1 8 days ago

    I was thinking of buying a new SBD replacement board. I would normally try repairing my original, but finding the kits are proving difficult since Big Daddy is on hiatus. Anyways, I've found two replacements. Altek and NVRAM/Weebly. If there are any others, I'd like to hear about them as well. My question is, can those with experience using these replacements tell me which one you prefer and why.

    Just looking at the pcbs, I see the LEDs on the Altek and while I'm not sure how they work to help you diagnose the board, it may be handy in troubleshooting them. On the NVRAM boards, the power supplies and filter caps just look more robust all around which means ultimately, it may be less likely to fail....at least in the power regulating section.

    Sooo, just looking for your collected opinions on your experience with these two boards. Thanks in advance.
    And if you happen to know any sources for the the full on rebuild kits for the originals, that wouldn't hurt either.

    #2 8 days ago

    Twice I've had weird power issues with the Alltek boards causing resets/boot problems. Weebly board fixed the issue. Minor/rare cases but, when both do the job well enough 99% of the time that's all I've got to go on

    #3 8 days ago

    I've only used NVRAM/Weebly boards because I've heard of sporadic Alltek issues like the one mentioned above (though rare), but that's also all I have to go on.

    I do like the fact that Weebly also offers assemble-it-yourself kits for a savings, if you like the more hands-on approach.

    #4 8 days ago

    Haven’t used Weebly boards, but have used Alltek boards in many applications. If there is ever any trouble, they are fast to respond and send replacements.

    I myself have not had any issues with Alltek boards, due to a bad board. I have screwed up one of their boards on accident(5v line didn’t like having 12v running through it, oops!), and they sent me a replacement at no cost.

    I’ve used their MPUs, Light boards, Sound boards, and Power Rectifier boards many of times. I stand by them, but again, that’s my experience with them.

    #5 7 days ago

    I've tried both and much prefer the NVRAM/Weebly boards. They now have SDB's with a no high voltage component for a bit less $. Works great with their 6 digit displays (or any other repro displays) which are excellent as well.

    #6 7 days ago

    I have had good success with Alltek boards, probably installed over 40 of their SDBs in the past 15 years with no issues. Used them on location games as well, and more than once the short circuit protection came in handy. No experience with Weebly boards so I can't compare the two brands.

    #7 6 days ago
    Quoted from Chico:

    I would normally try repairing my original, but finding the kits are proving difficult since Big Daddy is on hiatus.

    https://www.arcadepartsandrepair.com/store/pinball-kits-parts/pinball-kits/bally-as-2518-22-solenoid-driver-pcb-105c-cap-kit/

    #8 6 days ago

    NVRAM/Weebly easy

    #9 3 days ago

    I've upgraded the SDB lately, but havent updated the pictures yet. It now has 5v over voltage protection, redundant on board coil flyback diodes, better 5v regulator and some extra LEDs to indicate the solenoid/sound bank select status. 40A 100V mosfet coil drivers should be hard to kill with onboard flyback diodes. Just don't over fuse.

    #10 3 days ago
    Quoted from barakandl:

    I've upgraded the SDB lately, but havent updated the pictures yet. It now has 5v over voltage protection, redundant on board coil flyback diodes, better 5v regulator and some extra LEDs to indicate the solenoid/sound bank select status. 40A 100V mosfet coil drivers should be hard to kill with onboard flyback diodes. Just don't over fuse.

    Top shelf stuff as always.

    #11 3 days ago
    Quoted from barakandl:

    I've upgraded the SDB lately, but havent updated the pictures yet. It now has 5v over voltage protection, redundant on board coil flyback diodes, better 5v regulator and some extra LEDs to indicate the solenoid/sound bank select status. 40A 100V mosfet coil drivers should be hard to kill with onboard flyback diodes. Just don't over fuse.

    Stuff like this is why I will always feel comfortable buying or recommending NVRAM/Weebly boards. Great products with the genuine goal of improving them any ways possible. I have one of their universal MPU boards in my Stars and it works perfectly.

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