[BUILD] CAPI VP2X~500 Series~Preamp Kit~Official Support Thread

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jsteiger

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Apr 11, 2008
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Nashville TN
Hi all. I've built two VP26s and two VP312s, all with no issues, but now after maybe 2 years of working well one of my VP26 pres is very quiet and a bit distorted. Sound does pass through, but it's really quiet. I tried swapping out the opamp (Rogue Five DOA 1.3), tried a different slot in my 500 series rack (Vintage King Rack 500), but no luck so far. Any advice? Attaching a picture in case it helps. Many thanks for any ideas...
Most likely a bad solder joint(s) somewhere on the build.
 

malrooskee

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Joined
Apr 22, 2022
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1
Location
Los Ángeles
Hi there, just got my VP25 kits and while four of the five ceramic capacitors line up just fine with their identifiers, the C4 position one which should be an 82pF one has an identifier of 112J, whereas the build guide says it should be 82J. Like I was saying, the rest line up and this is the odd one out. Is this ok to install at C4?
 

jsteiger

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Joined
Apr 11, 2008
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3,389
Location
Nashville TN
Hi there, just got my VP25 kits and while four of the five ceramic capacitors line up just fine with their identifiers, the C4 position one which should be an 82pF one has an identifier of 112J, whereas the build guide says it should be 82J. Like I was saying, the rest line up and this is the odd one out. Is this ok to install at C4?
If you look close with good magnification you will see what you think is "11" is actually a not so great "8". That said, the supplied caps are indeed 82pF and not 1100pF.
 

rockinrob86

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Joined
Mar 9, 2015
Messages
238
Location
Tampa, FL
Hi all. I've built two VP26s and two VP312s, all with no issues, but now after maybe 2 years of working well one of my VP26 pres is very quiet and a bit distorted. Sound does pass through, but it's really quiet. I tried swapping out the opamp (Rogue Five DOA 1.3), tried a different slot in my 500 series rack (Vintage King Rack 500), but no luck so far. Any advice? Attaching a picture in case it helps. Many thanks for any ideas...

View attachment 92623
I fixed a few of these for a friend - his either had really low gain or were just cutting out. Some had dirty pads on the slot (scrubbed with toothbrush and alcohol) and the hardest one to get had a really dirty switch that shorted open. Finally got it situated and it was all good to go, has been working perfectly for a year or so now. They were a decade or so old and they smoked in the studio/car while carrying them in his lunchbox, so it happens.
 

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