I just replaced my brother's cyrus 2's red bipolar caps (470/6.3) with nichicon muse 470 / 35v. Bypassed under the board by Wima 1uF film caps.
The big gold polarised 470/50 are now Panasonic FC 470/100.
All the other little orange bipolars are now nichicon muse 2.2/50 (63 would be fine too) or 1/50. All bypassed by 0.1uF Wima film caps under the board.
Remaining polar caps now panasonic fc, all uprated voltage ratings.
It sounds absolutely bloody wonderful.
It makes me wonder if the money I've spent on my own pre/power/supplies over the years wasn't crazy.
The big gold polarised 470/50 are now Panasonic FC 470/100.
All the other little orange bipolars are now nichicon muse 2.2/50 (63 would be fine too) or 1/50. All bypassed by 0.1uF Wima film caps under the board.
Remaining polar caps now panasonic fc, all uprated voltage ratings.
It sounds absolutely bloody wonderful.
It makes me wonder if the money I've spent on my own pre/power/supplies over the years wasn't crazy.
Where is going this webaddress?
And an other question concerning the replace of NP elcaps:
in the last years there are some new non-polar capacitors to find like this examples (one of them very expensive):
1) 3,3uF/100 SMD: TDK CKG57KX7R2A335M335JH (5,-- €)
https://product.tdk.com/en/search/capacitor/ceramic/mlcc/info?part_no=CKG57KX7R2A335M335JH
CKG57KX7R2A335M335JH TDK | Mouser
2) 2,2uF/100 SMD: Murata GRM32ER72A225KA35L (1,50 €)
http://www.farnell.com/datasheets/415312.pdf
https://www.reichelt.de/Vielschicht...dex.html?ACTION=3&GROUPID=5155&ARTICLE=107460
3) 10uF/100V SMD: Cornell-Dubilier 106K100CS4G-FA (28,-- €)
http://docs-europe.electrocomponents.com/webdocs/13e5/0900766b813e52d1.pdf
106K050CS4G-FA | Capacitor Polymer 10uF | Cornell-Dubilier
4) 10uF/100V SMD: TDK C5750X7S2A106M230KB (4,-- €)
http://www.farnell.com/datasheets/1698875.pdf
C5750X7S2A106M230KB. - TDK - CERAMIC CAPACITOR, 10UF, 100V, X7S, 20%, 2220, FULL REEL | Farnell element14 Deutschland
5) 10uF/100V SMD: AVX RH221C106MA3RA3 (6,50 €)
RH221C106MA3RA3 | AVX RH Vielschicht Keramikkondensator X7R, 10μF 20% / 100 V, SMD RH22 | AVX
http://www.mouser.com/ds/2/40/rh-16777.pdf
Which of them provides low distortion by use in the signal pad ?
Thank you very much for advices.
Can anyone analyse what happens to the voltage across C43 if the output protection Q35+37 triggers during overload and/or due to one or other supply rail dropping out?
A protection against exceeding voltage on C43 is a reverse connected 1n4148 across the cap to prevent Voltage exceeding ~-800mV
I would also fit a series pair of forward 1n4148 diodes across this cap. This ensures that the diodes never pass for voltage <900mV
Both these will protect a polarised electrolytic even in the event that the output stage fails and sends full rail voltage to the speaker output.
I would also fit a series pair of forward 1n4148 diodes across this cap. This ensures that the diodes never pass for voltage <900mV
Both these will protect a polarised electrolytic even in the event that the output stage fails and sends full rail voltage to the speaker output.
go to web archive
https://web.archive.org/web/20060714232109/http://www.elcap.de/4437/index.html
https://web.archive.org/web/20111101160222/http://elcap.de/4437/9025.html
https://web.archive.org/web/20111101160036/http://elcap.de/4437/8944.html
https://web.archive.org/web/20111101160112/http://elcap.de/4437/16301.html