*** THIS HAS BEEN SOLD ***
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FS: Working Pole Position PCB
- Thread starter FrizzleFried
- Start date
OP
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*BUMP*
Trades/offers/etc. considered.
Trades/offers/etc. considered.
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*BUMP* - Price drop - $150 + shipping.*
*price updated
*price updated
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No... you got it wrong... there are no working PP cabs... but plenty of working PP PCB's.
No... you got it wrong... there are no working PP cabs... but plenty of working PP PCB's.
after I followed the exact plan that frizz did, mine has been perfect for months aswell.
I don't pretend to know what the issues are with PP boards, but I had 2 that both went from complete shit to 100% working by wiring a switcher to the points on the board.
SuperSprint
Well-known member
That's good to know. I just bought a PP cab that's in good shape, but the board plays sometimes, and locks at garbage or RAM errors other times. Just today, it played 1 out of 10 boots. But that one time it played perfectly for half an hour.
SuperSprint
Well-known member
Thanks for all the info, it will come in handy for sure. But, I don't understand the above comment. Assuming both supplies are set to 5V +/-5%, why would it be an issue with both supplies active? Multiple sources to a common bus are common in the DC world.
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To be honest with you... I have no idea why you can't tie the two together. That's what I read when I did mine... that's what I did. Perhaps that part isn't necessary? The instructions seemed to emphasize not doing do...or at least that is how I took it... I've tried for the life of me to find the original instructions I read. I want to say Dick wrote them but don't quote me on that one.
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SuperSprint
Well-known member
Thanks, but I really don't want to put that much into a PP. I bought this one thinking it needed a rejuve and some ram, only to find these threads and learn what a mess these boards are. I'm hoping it's just a voltage issue, but I'm getting 4.99V at the video test point.
As for the DC supplies, parallel DC supplies are very common in telecom power. The only issue I can see is if the original DC rectifier went out of service, the switcher would be back feeding the ARII's over the edge connector. The edge connection isn't great, but the ARII's are certainly less load than the original 25A boardset. IMHO, as long as you bond the grounds for the switcher and the old supply with a short stout wire (to minimize ΔV on the ground bus) and keep the +V at +/-5% of one another, it should work quite nicely.
As for the DC supplies, parallel DC supplies are very common in telecom power. The only issue I can see is if the original DC rectifier went out of service, the switcher would be back feeding the ARII's over the edge connector. The edge connection isn't great, but the ARII's are certainly less load than the original 25A boardset. IMHO, as long as you bond the grounds for the switcher and the old supply with a short stout wire (to minimize ΔV on the ground bus) and keep the +V at +/-5% of one another, it should work quite nicely.
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...to the top.
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Free bump hump day bumpday, dunno about that picture though, if I ever see a picture of a working pole position pcb I expect bigfoot to be standing next to it!
Dude... you called it!
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* bump *
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Oh yeah baby... back to the top!
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Hey I have a working boardset, where did you get the info to do that test point tie together?
Want to make sure it stays working.
Want to make sure it stays working.
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*BUMP*
Between this and the 3 Pole Position cabs being sold in So. Cal you'd have a kickass WORKING Pole Position...
Between this and the 3 Pole Position cabs being sold in So. Cal you'd have a kickass WORKING Pole Position...
