2. amps-preamps
  3. 139915-2206

Bypass capacitor position?

Hi all. I've had a pair of Coincident Frankensteins for a number of years and just opened them up to put in new capacitors.  In doing so, I discovered that the previous owner had installed bypass caps on the power supply capacitor bank.  Those bypass caps are, however, in different positions on the two monoblocks.  Obviously they're both within the same capacitor bank, just linking different parts of the chain, so perhaps that isn't an issue.

Sometimes I think I can hear a small difference in the two amps, but if it's there it's really subtle and I may be creating a self-fulfilling prophecy.

Can anyone provide input on if this fact will change their operation/sound?  I'm trying to figure out whether to cut one of them out and move it, and if so, which is the appropriate position...

Monoblock 1:  https://photos.app.goo.gl/NMGYvU1sdHbGLqb37
Monoblock 2:  https://photos.app.goo.gl/ogDkNio1DyqvM1rs6

Thanks...
128x128cal3713
salectric
747 posts
 
I can’t see the wiring details on my phone.  However, it appears the two channels are mirror images of each other so the bypass capacitor positions would logically be reversed as well.

i notice each amp has what appears to be a Jupiter copper foil capacitor.  That is probably the coupling cap between the input and driver sections.  (I can’t tell for sure because I can’t make out the wiring connections.)  If that is correct, it is a major upgrade over the stock cap.  
grannyring's avatar
grannyring
6,436 posts
 
I agree. All looks fine to me.  Nice to see an all film cap power supply.  Not often done, but really is a nice improvement in SQ. 
cal3713's avatar
cal3713 OP
1,421 posts
 
Everything is mirrored, but you’ll notice that the yellow REL-caps are in the same position (i.e., both next to the leftmost power supply capacitor)... sorry, I should have been clearer about what capacitor I was talking about.

I put in the Duelund CAST caps... previously were some little Solens.


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