I hope the modules are running well following our phone conversation.Posting here to get some help.
I seem have to run into a small issue. I just swapped the chassis of the amp and 1 of the channels is not giving out any sound.
I reflowed the entire board assuming there might have been some dry solder and re did the complete biasing as per the build guide.
The VAS is set to 600mv and the output bias is set of 13mv. The amp is nice and warm and the offset is stable too.
Connected the signal and tried again but no luck. I am confused now 😞.. the DMM on the left showing the offset and on the right Bias. View attachment 1198954
hi, what about C3/4 - those also can have lower values? my 2.2mF caps measures 1.8mF, so i'm bit puzzledThe 2200uF (C17) between the OPS drivers' bases is oversized. It could be as small as 10uF and the amp would still work fine. But I left it there because I thought the board looked cool with it.
hi, what about C3/4 - those also can have lower values? my 2.2mF caps measures 1.8mF, so i'm bit puzzled
if those parts are important then i'll order some more and try to match to avaited value.
also...
-my 220uF caps [C19...26] measures closer to 180uF, isn't it to low? i have some leftover caps from Wolverine (~250-260uF range) so i can use those if it won't do harm to v5 performance;
-if one would like to use this board with +-28V rails [source: smps; low power system or active channels] - what changes should be made to components values (any??);
-my DAC outputs ~2.2VRMS at 0dbFS. is there a way to lower input sensitiwity that with +-28V rails PeeCeeBee v5 won't clip?
i think my multimeter doesn't like NICHICON caps 2.2mF caps shouldn't be older than 3-4years (at most)but I feel a bit concerned about the quality of the caps that as you say, apparently measure close to their -20% range. But then again the lower measured values seem consistent in both cases of large value and small value caps. Maybe it has something to do with the meter. I think all your capacitors are just fine.