When you say there is no use trying Duelunds or VCaps without BG first that implies either that BG are better than them or BG somehow influences their performance to a great extent. Can you really say that BG FK can compete with the likes of V-Cap CuTF in terms of performance? I have a hard time believing that any electrolytic will provide improvements even close to CuTF. $50+ is what you would pay for 2.2.uF Clarity MR, which is one of the very best film caps that smokes your run of the mill Solen or Bennic PP. Is the gap between Elna and BG that wide? Plus it's not just the per cap price that I am balking at, it's the number of caps too. At today's prices replacing every electrolytic in the Havana can easily run you $1000 assuming you can find all of them. Can changing one or two provide huge improvements? If so, what are the key electrolytics to replace first? I may start with one or two and see what happens.
I am adding a 0.22 C12 CuTF this week and will post photos of the Duelunds when I do that.
I think, the correct answer is ... b).
So, Robert refer to these: without BG on the electrolytic section, you don't touch the truly "high-end" sound, or BG influences their performance to a great extent! After I installed about a month ago two non-polars BG (the orange capacitors), I exclaimed: Wow! I couldn't believe that two electrolytic capacitors (placed where they belong) can influence so evident the sound: more refined texture on all frequencies, more rezolution & coherence, a more natural sound! I replaced Elna Silmic-I (47uf/25V) with BG N-series (47uf/50V), just like in the picture made by Robert (two arrows marked with gray).
Can changing one or too provide huge improvements?
No, it's not a huge difference. Yet it is so important that must be done on this level of quality that we have achieved. I'm totally agree with what he said Robert some time ago: " I can not imagine the Havana sound without them!!" (refers to non-polar BG).
The next in importance are those marked with purple arrows. The large capacitor near the R-Core should be replaced (mandatory) with BG FK series! I understand from Robert that it is a critical capacitor and it is important to be replaced with what is better.
I will try to change the remaining (smal) capacitors : Silmic-I of 47uF with 100uF BG F- series.
Ignat suggested to replace one of 47uF (marked on the photo) with higher value like 100uF.
This is Ignat post: "Frankly speaking it was firstly suggested by someone in the previous posts /I have quoted him/ but the best result in my case was after I simply placed there one general purpose / mean very simple one/ 100 uF.100V in parallel - on the bottom part of the board. Now I have ordered an ELNA Silmic II for there. Be careful - in parallel the value will be the sum of them but the voltage is shared - therefore you need 100 V for the second one".
So I think that the key of electrolytic to be replaced first are those marked in the picture.
Edited by loserica - 12/16/12 at 1:11am