"For 1.000uF/63V I only get the Panasonics FC, any better alternative? "
If I where you I'd try Panasonic FM instead of FC, again if you can find them.
Saludos,
Audiofanatic
Panasonic FM max. 50V, see data sheet link:
http://docs-europe.electrocomponents.com/webdocs/05f3/0900766b805f3abe.pdf
Hola Mago
If the value doesn't need to be exactly 1000 Uf, than use two 2200 in series (negative leg soldered together) and use both + positive leg to get 100 volt .
I did this this with great result in other circuits.
Hay mas maneras para llegar al final ganando! (there are more way's to reach the end )
Hasta la proxima,
(cheers)
Audiofanatic
If the value doesn't need to be exactly 1000 Uf, than use two 2200 in series (negative leg soldered together) and use both + positive leg to get 100 volt .
I did this this with great result in other circuits.
Hay mas maneras para llegar al final ganando! (there are more way's to reach the end )
Hasta la proxima,
(cheers)
Audiofanatic
IMO Pana is quite honest sounding and if you use 1000u, you will not loose bass.
I got a lot of 1000u 100v Super Through... I will try those and report the results
As for the trimmers I guess the max value is 7/150pF PTFE... not enough for the 16n... You will need a third cap (220p smica maybe).
I would try a fixed 330p mica and compare with a 390p mica // CCCP silver mica 15,72nF
Ricardo
Hi Ricardo,
Sorry I don't explained me well, the trimmers are for fine adjustment to get the exact capacitance value for RIAA.
For mine Salas Phono I see 4.700uF/10V Panasonic FM min. order 5 caps at 0,99€ each.
Link: Panasonic | Pasivos | Condensadores | Condensadores ElectrolÃticos de Aluminio | Condensadores radiales, hasta 105°C |EEUFM1A472L
I have to look for if I have some BG 4.700uF/16V used in other DIY audio projects for digital.
Gracias Audiofanatic
Thks for advice, but in this case I prefer only 1 cap.
Congratulation for your Spanish, surely I can not have your same level speaking English.
Best
Merlin El Mago
If the value doesn't need to be exactly 1000 Uf, than use two 2200 in series (negative leg soldered together) and use both + positive leg to get 100 volt .
I did this this with great result in other circuits.
Hay mas maneras para llegar al final ganando! (there are more way's to reach the end )
Hasta la proxima,
(cheers)
Audiofanatic
Thks for advice, but in this case I prefer only 1 cap.
Congratulation for your Spanish, surely I can not have your same level speaking English.
Best
Merlin El Mago
Just for fun, here you have my artwork.... This is the result of the several evolutions on the initial project... That is why some caps do not fit
Nice work, are you bypassing an Obbligato with a Mica??? could you tell me all the tricks you do?
I posted most of my mods here so there is nothing new really.
My experiments are based on listening impressions backed up by tech info that I get from here.
I found the 47n obbligato do not have exactly 47n so I am experimenting with small value micas.
In reality if we have less than 47n, we get a bump in the mid freq making the sound too forward in the mids.... I am trying to reach optimum results without a trimmer.
Everytime I do a new mod to improve definition I find it is necessary to fiddle with other parts to compensate.
How is your work going ? did you already built the riaa board ?
Ricardo
PS: It seems DIY is a never ending story... You never quite reach the end... There is always a way to improve.
My experiments are based on listening impressions backed up by tech info that I get from here.
I found the 47n obbligato do not have exactly 47n so I am experimenting with small value micas.
In reality if we have less than 47n, we get a bump in the mid freq making the sound too forward in the mids.... I am trying to reach optimum results without a trimmer.
Everytime I do a new mod to improve definition I find it is necessary to fiddle with other parts to compensate.
How is your work going ? did you already built the riaa board ?
Ricardo
PS: It seems DIY is a never ending story... You never quite reach the end... There is always a way to improve.
For 47nF I bought silver mica, I agre that is best solution a fixed cap to get the right total value but there is some values that aren't standard.
Asked the Shinkoh + Kiwame resistors to Pcx, I want to start next monday the PS, the Phono RIAA will make when resistors arrived.
DIY it's very expensive, but is very exciting do ourselfs the things & if sounds well perfect if not always is possible to up-grade with better parts or changing de schematic.
Merlin El Mago
Asked the Shinkoh + Kiwame resistors to Pcx, I want to start next monday the PS, the Phono RIAA will make when resistors arrived.
DIY it's very expensive, but is very exciting do ourselfs the things & if sounds well perfect if not always is possible to up-grade with better parts or changing de schematic.
Merlin El Mago
Received today the 12 mica caps
As you can see all are tested to know exactly value
Rcruz, asap I will post the pic for 47nF silver mica cap, is really big. No I don't have troubles with taxes for Pcx, but always ordered more or less about 100$00.
An externally hosted image should be here but it was not working when we last tested it.
As you can see all are tested to know exactly value
Rcruz, asap I will post the pic for 47nF silver mica cap, is really big. No I don't have troubles with taxes for Pcx, but always ordered more or less about 100$00.
Ricardo, the 47nF/500V silver mica pic near the russians so you have an idea how bigs are.
RS online: 15€84 each
Link: | Pasivos | Condensadores | Condensadores de Mica | Serie D
Mouser "no stock", price: 97-186€00 each
Digi-Key "no stock", price: 23-27€00 each
Farnell have on stock but price: 30€25 each
If you have problems to buy in Pcx or Rs online let me know, if you want I can help you.
Felipe
silver mica pic near the russians so you have an idea how bigs are.An externally hosted image should be here but it was not working when we last tested it.
RS online: 15€84 each
Link: | Pasivos | Condensadores | Condensadores de Mica | Serie D
Mouser "no stock", price: 97-186€00 each
Digi-Key "no stock", price: 23-27€00 each
Farnell have on stock but price: 30€25 each
If you have problems to buy in Pcx or Rs online let me know, if you want I can help you.
Felipe
Last edited:
Received today the 12 mica caps
As you can see all are tested to know exactly value
You see, no nominal 15.72n is more or less different than about 15.6n in your batch. That will take a corrective cap addition as Ricardo did. Measure your 47n also. Get a couple of 2.2Meg resistors to test in parallel to each of the 47k for final tuning when the phono will be ready. That will sway the overall tilt enough so to judge how it will go in your system given the total tone with your parts types, values, load, TT setup etc.
48€ customs
I never paid nothing for the customs (Pcx-Canada, Michael Percy-U.S.A., EIFL-Japan, Borbely Audio-Germany, Selectronic-France, etc)
I am glad if I can help you.
Felipe
This advice is to try when the fono will ready, so I test with & without resistors and after I can left mine preferred overall tilt ok?
BTW.... It is possible your DMM is not reading correctly because this russian micas have +-0.3% dev so min value should be 15.67 and max 15.77n.
I am very interested in your results using these caps. Hope you get all the parts soon
Never, never trust specified values
. I remember once used a PRP marked 1Kohm & measured 500ohms, other issue is check the parts are not internally broken (rare but possible).As I remember only: Pcx resistors & 0,1uF teflon russians caps.
I will let you know in mine results, thanks
Felipe
BTW.... It is possible your DMM is not reading correctly because this russian micas have +-0.3% dev so min value should be 15.67 and max 15.77n.
I am very interested in your results using these caps. Hope you get all the parts soon
Mine LCR is going well, I measured without cap: + 0,01nF so I rested 0,01nF to the reading value.
