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May 20, 2022, 11:49:02 PM

Author Topic: speedball install DC voltage check issue [resolved]  (Read 178 times)

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Offline eharent

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speedball install DC voltage check issue [resolved]
« on: January 20, 2022, 01:00:26 PM »
Hello,

just installed the first board and doing the DC voltage check. i am reading way above on both terminal OA and OB. reading numbers all over on OB way above. i tried to re solder OB wire on the board as well as the two wire on the terminal but still not right. also now OA is not reading incorrect at 150 and it was checking right at first. is there anything i should check into? my crack without speedball was working fine for 2 weeks no issue. thank you much for the help guys

cheers,

Emmanuel
« Last Edit: January 23, 2022, 04:51:12 AM by Paul Birkeland »

Offline Paul Birkeland

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Re: speedball install DC voltage check issue
« Reply #1 on: January 20, 2022, 01:01:00 PM »
Is this on the small PC board or the big PC board?

Can you post some photos of your build?
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline eharent

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Re: speedball install DC voltage check issue
« Reply #2 on: January 21, 2022, 02:39:04 AM »
Hi Paul,

thank you for your prompt reply. here are some pics of the board. it is the first board to be installed and it is the smaller one of the two.
hope we can spot the issue! may be it is obvious to you?

thks again

Brgds,

Emmanuel  ;D

Offline bernieclub

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Re: speedball install DC voltage check issue
« Reply #3 on: January 21, 2022, 04:11:59 AM »
Q1b transistor looks backwards.
Bernie Zitomer

Offline eharent

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Re: speedball install DC voltage check issue
« Reply #4 on: January 21, 2022, 04:15:50 AM »
Hi Paul,
OMG so silly! thank you for spotting this. i will remedy this ASAP and do a check again. will keep you updated

thank you
Emmanuel

Offline eharent

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Re: speedball install DC resistance check issue
« Reply #5 on: January 21, 2022, 04:22:27 PM »
Hello,

just mounted the large board (pictures attached) and connected it. Positioned it on top as instructed and screwed it. just did the resistance check on OB and OA and i am not reading anything. the meeter stays at 0.L. i would appreciate the help!
thank you much
Emmanuel

Offline Paul Birkeland

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Re: speedball install DC resistance check issue
« Reply #6 on: January 21, 2022, 04:23:54 PM »
meeter stays at 0.L. i would appreciate the help!

OL means over limit, which is what you are supposed to see at those terminals.

I would reheat the solder joints on those 47K resistors until the solder flows through the board.  Definitely do not solder both sides of the PC board, as it's important to heat these joints up enough that the solder flows into the hole all the way and comes out the other side on its own.

« Last Edit: January 21, 2022, 04:25:50 PM by Paul Birkeland »
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline eharent

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Re: speedball install DC voltage check issue
« Reply #7 on: January 23, 2022, 04:00:12 AM »
Hi Paul,

i wanted to thank you for the help and advise! i have finished the crack complete with the speedball. and the upgrade sounds amazing!!! after listening at the stock crack, i definitely hear the difference in separation mid an high. super ultra quiet! so far so good with the build no noise or unbalanced sound. crossing fingers that it will last this way :) since it is my first introduction to electronic and build. love it!

thks again

Emmanuel