Valve Itch phono

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#422
I bought togheter Ricardo & Massimo 23 caps 15nF FT-1 & no one was really 15nF all rated 200V like all FT-1 so can use with Itch, FT-3 rated 600V don't have 15nF & 47nF values, could you recommend other Russian teflon types 15nF & 47nF matched pairs with Voltage rated for Itch?

N.B. I don't have Mark commission.
 
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#423
I see both 0.047uF and 0.015uF in 600V 1% Auricap in their catalogue. Russian ones if you can't find, I can't find either. The commission comment was unfortunate. Of course nobody thought of you such. We just look for best options.
 
#431
RCruz said:
I still do not understand the difference between 1% and 10% parts once we are making sure they are matched....
Click to expand...

Problem is we can't find something standard for 1-2% tolerance and 250V, new, generally available, to include in the BOM. Finding some way with a dealer to measure and send from small NOS 5-10% stock or new, is not something defined to include in a BOM, especially future wise.
 
#432
RCruz said:
I still do not understand the difference between 1% and 10% parts once we are making sure they are matched....
Click to expand...

The tolerance may not tell the whole story, generally the more tightly toleranced the part is designed to be, the better the stability over time and temperature. An extreme example might be a pair of 10% carbon comp resistors matched to 1% or better, a few years on they won't be. (The physical character of the carbon slurry used in these resistors is affected by temperature, moisture and some specific aging mechanisms.) Similar mechanisms also exist in some types of capacitors as a result of the care taken in the construction, choice of materials used, and packaging..

Generally good film capacitors are stable and may be matched to tighter tolerances, starting with a 5% part or better is generally a good idea.. 2% tolerance films are hard to find, but do exist.
 
#433
What happened with the second build is ~40pcs 1600VDC/450VAC Arcotronics 5% MKP 27.5mm pitch electronic ballast caps were found for cheap from a local stockist and got put under the LCR bridge. Enough good pairs came out.
 
#434
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#439
I have seen many such capacitors in Jadis gear. Could have been the MKT ones though. They have also in the gamut the 0.1u 250V ones in the mu followers, they can be 10%. Same for the 2.2u output and 4.7u RC decoupler. And they have SCR 5% also.

P.S. Do they accept Paypal?
 
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