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Build help and troubleshooting => MP573 Microphone preamplifier => Topic started by: Stephan on February 01, 2022, 08:27:24 AM

Title: Tantale capacitor C20 plus lead position ? Doc number / board revision link ?
Post by: Stephan on February 01, 2022, 08:27:24 AM

Hello, 

i am currently assembling an MP573 bought in April 2020 (no time to do it before). Board is rev 2.2. and associated doc on the box is DOCS-19. 

DOCS-19 states that, for all tantale capacitors "plus lead is always on right when facing the marking with the leads pointing down". And that's not the case for C20 whose "+" looks labeled on the left side.

I just check DOCS-20 and look the line about "plus lead always on the right" disappeared. May you confirm that, for my board 2.2 C20 has to be soldier with the plus lead on the left ?

By the way, am i supposed to use DOCS-20 (and even perhaps 21 to 24 ?) for the setup of my rev2.2 MP573 board ? Is there a place where i can find the link between an hardware revision board and the latest doc level for it ?

Thanks !

Title: Re: Tantale capacitor C20 plus lead position ? Doc number / board revision link ?
Post by: JPK on February 02, 2022, 11:16:05 AM

We have removed the sentence "plus lead always on the right" because we since have found capacitors that didn't follow this rule.
The correct and universal rule is: the + lead is the longest and it is marked with a + on the cap.

You should stick to the DOCS-19 if that it what is written on the kit box.

Title: Re: Tantale capacitor C20 plus lead position ? Doc number / board revision link ?
Post by: Stephan on February 02, 2022, 01:06:54 PM

OK ! Thanks a lot Jean-Pierre for your answer !