Aleph J input capacitor (C1)

frags · 01:09 PM

How is critical to have high quality capacitor on negative input for non-balanced configuration (negative input is grounded)? Should I use PP capacitor? Any experience with different capacitors here?
Also I had to change the feedback capacitor to 10pf to get rid of spikes with square waves. Any comments about this?
I did not find anything in the corresponding thread.

Nelson Pass · 11th August 2010, 06:58 PM

I think the general consensus is that capacitors in the signal
path are critical.

PolyProp is very nice, but I do get by with the Elna silk
electrolytics.

frags · 07:40 PM

Thank you Mr. Pass. What is capacitor type you used in production Aleph Js? According to pictures and cap size it was some PET capacitor.

PS. I'm using Evox Rifa MMK 1uFx63V as C1. Is it good enough?
PP capacitors are pretty big for Aleph J boards I have.

ggetzoff · 19th August 2010, 12:03 AM

These.....

Anything that has hemp in it has to be good.

Elna Electrolytic Capacitors RFS Series

Nelson Pass · 19th August 2010, 03:59 AM

You don't have to use a capacitor at all, but you will find
yourself with some DC offset until it warms up.

11th August 2010, 01:06 PM	#1
frags diyAudio Member Join Date: Aug 2009	Aleph J input capacitor (C1) How is critical to have high quality capacitor on negative input for non-balanced configuration (negative input is grounded)? Should I use PP capacitor? Any experience with different capacitors here? Also I had to change the feedback capacitor to 10pf to get rid of spikes with square waves. Any comments about this? I did not find anything in the corresponding thread. Last edited by frags; 11th August 2010 at 01:09 PM.

11th August 2010, 07:36 PM	#3
frags diyAudio Member Join Date: Aug 2009	Thank you Mr. Pass. What is capacitor type you used in production Aleph Js? According to pictures and cap size it was some PET capacitor. PS. I'm using Evox Rifa MMK 1uFx63V as C1. Is it good enough? PP capacitors are pretty big for Aleph J boards I have. Last edited by frags; 11th August 2010 at 07:40 PM.

19th August 2010, 12:03 AM	#4
ggetzoff diyAudio Member Join Date: Nov 2004 Location: Southwest	These..... Anything that has hemp in it has to be good. Elna Electrolytic Capacitors RFS Series __________________ Airline Pilot-If it's not Boeing I'm not going. "Brain as big as a planet..." {sic} Nelson Pass

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Input Capacitor	otherside	Chip Amps	26	20th January 2010 03:32 PM
simple se c1 capacitor blew	kerux	Tubelab	13	19th July 2009 01:51 AM
Input Capacitor	Shaz	Chip Amps	3	20th September 2003 06:39 PM
Aleph 5 - C1 too big?	dantwomey	Pass Labs	4	4th September 2003 04:53 PM
P3A Amp: Input Capacitor C1	dine1967	Solid State	4	3rd February 2003 12:46 AM


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

11th August 2010, 06:58 PM	#2
Nelson Pass The one and only Join Date: Mar 2001	I think the general consensus is that capacitors in the signal path are critical. PolyProp is very nice, but I do get by with the Elna silk electrolytics.

19th August 2010, 03:59 AM	#5
Nelson Pass The one and only Join Date: Mar 2001	You don't have to use a capacitor at all, but you will find yourself with some DC offset until it warms up.

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read