Valve Itch phono

[Salas]

Sorry you are right, I forgot HV for Itch RIAA, but for 15nF Marko has 0.015uF 10% tol. 400V, TexCap 200GGS.

Buying only one value from 10% stock, paying postage and matching fees for just two capacitors and then mixing them with other makes in the same filter? Does not sound very practical IMHO.

 

[merlin el mago]

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.

 

[Salas]

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.

 

[merlin el mago]

AuraT (Auricap teflon) 0.015uF in 600V is 5% not 1%. About commission yes you are right was an unfortunate comment. Me too just look for best options.

 

[Salas]

I saw 1% poly Auricap which are very competent capacitors. I was not referring to Teflon AuraT. Here is Riaa, we need built in accuracy first.

 

[merlin el mago]

Sorry Salas both values Auricaps 600V are 10% not 1%, see caps manufacturer link:audience : capacitors : auricap

P.S. I like Auricap too.

 

[Salas]

So they have mixed tolerances in same 600V range. Didn't scroll fully down when I first saw it. Thanks for spotting. What else do we see on ebay 250V or more for 0.015u and 0.047u? Micas, PIOs?

 

[woodturner-fran]

It would be worth one of your time to shoot an email to the Russian sellers linked in the BOM and ask can they match and if so, a price for all the Teflon and mgbo caps.

Fran

 

[merlin el mago]

@Salas
Don't worry, both we are searching the best for everbody.

@Fran
It's really difficult to get 1% teflon caps for RIAA but if you find count in me I will buy.

 

[RCruz]

I still do not understand the difference between 1% and 10% parts once we are making sure they are matched....

 

[Salas]

I still do not understand the difference between 1% and 10% parts once we are making sure they are matched....

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.

 

[kevinkr]

I still do not understand the difference between 1% and 10% parts once we are making sure they are matched....

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.

 

[Salas]

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.

 

[merlin el mago]

ICEL MKP 15nF 1% 630VDC
1 pc 1,72 EUR
10pcs 1,49 EUR
50pcs 1,28 EUR
100pcs 1,05 EUR
+ VAT + shipping
https://www1.elfa.se/elfa3~eu_en/elfa/init.do?item=65-456-44&toc=18844

ICEL MKP 47nF 1% 630VDC
1pc 1,97 EUR
10pcs 1,72 EUR
50 pcs 1,47 EUR
100 pcs 1,20 EUR
+ VAT + shipping
https://www.elfa.se/elfa3~eu_en/elfa/init.do?item=65-457-01&toc=18844

I will buy, if there is more people interested to buy I can share my order, interested people please let me know?

 

[Salas]

Excellent find. Fits the purpose.

 

[merlin el mago]

Thank you

 

[woodturner-fran]

Good find!

 

[merlin el mago]

Good find!

Thank you Fran

 

[Salas]

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?

 

[merlin el mago]

Yes you are right my Jadis JA80 have some of the same manufacturer, they don't accept Paypal, 47nF are out of stock till 2011-10-12

People interested:
merlin el mago 4 x 15nF + 4 x 47nF
Marra 4 x 15nF + 4 x 47nF