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In Reply to: RE: Recapping a Electrocompaniet 4.5 preamp ... is it worthwhile ? posted by fmak on July 15, 2014 at 06:40:54
Hi and thanks a lot for the kind and valuable reply.
Do you have any specific suggestion of brand/series ?
I read that many brands in ebay are low quality
So i was looking at Rubycon, Panasonic or Nippon Chemicon, 105C series
But i do not know the specific best series ...
Then i see a lot of diodes and read that the Schottky type are better
So i was thinking also to replace diodes.
Unfortunately i could not get the service manual
I have already some red Mundorf to place at the output
Honestly i liked it better closed than open
I am a believer of minimalism ... when i saw these endless rows of transistors i almost fainted.
Why in the world so many transistors are needed to give a very little voltage gain and some buffering effect to an already high level signal ?
But i like it because it is balanced and remote controlled.
Thanks again.
Kind regards,
bg
Edits: 07/15/14Follow Ups:
There are no Wimas.
The 4 Coupling-Caps are ERO MKC and there is no need for a change.
Peter
Hi and thanks
To be precise in my unit they have been already replaced with some black Audyn Cap i think MKP, really too big.
I have instead bought four of these in the picture that i intend to use
They are the Mundorf entry level.
Problem is that both Audyn and Mundorf are much larger than the original
Do you mean that the ERO MKC are perfectly ok ?
I could try to find some like the originalBut the really sad thing is that PS caps are closely mounted (why they do this with all the space available is a mystery to me).
I would have double their uF very happily.
And i am sure that this could be beneficial, maybe even more than signal coupling caps replacement.
More energy available, lower impedance, less noise, higher quality caps ... every parameter would be better.
I should find a way to do this, maybe leaving some length in the terminals
Kind regards,
bg
Edits: 07/16/14
"Do you mean that the ERO MKC are perfectly ok ?"
In my opinion they are neutral and I prefer them to MKP which often 'sound' like plastic.
If you want them a little warmer, shunt little Styroflex Caps like 1nF.
For me, the entry level Mundorf MKP is no good cap.
Peter
" In my opinion they are neutral "
Hi Peter and thanks again
Now that you mention them i have seen them also in a bryston preamp
The original ones are lost unfortunately
But looking on ebay i see squared and cilindrical ones
Are equally ok ?" and I prefer them to MKP which often 'sound' like plastic.
If you want them a little warmer, shunt little Styroflex Caps like 1nF.
For me, the entry level Mundorf MKP is no good cap.
Peter "arrgh ... i was sure of the selection ... even if they are entry level
I will take out the present ones and measure the distance between the pins
on the pcb
Are also the cilindrical ok ?
Thanks a lot.
Kind regards,
bg
Edits: 07/16/14
The axial/cylindrical ones are ok.
You could also try Kemet (Rifa/Evox) SMR or Siemens MKL, my prefered caps in low voltage applications. Look @ ebay (.de)
Peter
Hi and thanks again
I will go hunting for them. They are less common i see
I have found one vendor but i have to check if he ships to Norway where i am
Thanks a lot again.
Kind regards,
bg
The Bulgarian or Romania guys will ship to Norway.
For Kemet there is a supplier in Sveden.
Hi and thanks again.
I will try them. Siemens caps are quite famous.
I remember the mythical Sikorels ... now Epcos i think.
Kind regards,
bg
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