Either 'Silver Mica' types, or C0G/NPO ceramic types - I have used both (in different amplifiers) but I personally prefer 'C0G/NPO' ceramic, for their small size and good performance, as a bonus they are also cheaper than Silver Mica, at least where I can get them from.What condensers can be used on replacement of "Black flags" with a small capacity from 2-47pf?
The ones in the link are multilayer, I have not investigated the use of any other type.What of ceramic condensers it is better, multilayered or single-layer?
I have never needed to change a 2SK129 - ever.2SK129? What changed for?
I agree, its not the 2SK129, I have never ever had to replace one either.I have never needed to change a 2SK129 - ever.
It is very unusual for a 2SK129 to be the cause of high DC offset - in the vast majority of cases the problem lies elsewhere.
Are both channels like this? or just one?At the exit it is not possible to achieve stable zero. Tension jumps to 200 mV.
I strongly recommend you replace them.Washed out trimmers and greased.
They can make a difference to this kind of problem, providing they are 'new' replacements.It is possible to expect it from condensers?
Definitely more reliable.Really the modern ceramics is better "Black Flags"?
No.Sounding of the amplifier will not be worse from it?