Output Capacitor Upgrading Questions

A rough guide for a pair of capacitors

$10 or less you could try adding 1uf film bypass to the electrolytic capacitors

$30 approx and a little time spent ebay hunting you will find standard 100uf film capacitors used/surplus

$60-$100  and ever upwards new branded audio film capacitors
 
The output caps are a large value.  I agree with Mcandmar, another electrolytic won't get you where you should be. 

What you are looking for is a film cap.  Daytons are inexpensive for that value and voltage rating.  They will make an appreciable difference in the sound.

Do a search and read this thread, you will find a pretty good list of film caps available that will make an appreciable difference.  (I don't have a Crack, so haven't done this myself)
 
Strikkflypilot said:
Thanks Jamie.
It looks like a Mundorf MCap 250v 100uF bypassed by a Mundorf Supreme 1uF
would be sweet.
Any thoughts?
Click to expand...
Yes, that's a very nice option.  I have the Mundorf MCap 100uF, but bypassed with a 1uF Jantzen Superior Z-Cap.  A big step up from the stock electrolytics.
 
I have done some research now.
I understand that these Mundorf film capacitors are supposedly
not polarized.
Nevertheless some people seem to agree upon that the outer layer should be connected toward the amplifier end and the inner end towards the output for the least possible noise.
Do any of You know how You can tell which side is which?
I do not possess an oscilloscope.
 
If its any help this is a post I had remembered seeing which was said to originate from Mundorf.

"In general the outer foil of Mundorf capacitors is on the left hand side.
So the flow of the signal should be same as the flow of the text."

"Capacitors with SUPREME winding technology are wound fully symmetrically
and hence directivity-free (see: www.mundorf.com/Supreme.pdf)."
 
Thanks Jamie!

Yes, that definitely helps.
It also fits with "a german way" to do things. Very systematic.
I know, I lived there for 7 years.
 
My RTI caps are the same with the signal in the direction the text is read so in on left side and out to the right.
 
Does anyone know which of the affordable film caps are the smallest? I'll be short on space and want the smallest films possible. So far it seems like it's the 100uF Janzen or JFX caps.

Also, how do you order from the JFX cap's website? It's so archaic. I didn't even see any prices.
 
Joshewah said:
Does anyone know which of the affordable film caps are the smallest? I'll be short on space and want the smallest films possible. So far it seems like it's the 100uF Janzen or JFX caps.

Also, how do you order from the JFX cap's website? It's so archaic. I didn't even see any prices.
Click to expand...

The Erse Pulse are the exact same size as the JFX and I believe made by the same company. The JFX go in with ease by the way, If space is restricted you could always consider fitting a smaller value capacitor 75, 80, 90uf

I have some jfx fitted in mine.

http://bottlehead.com/smf/index.php/topic,5284.0.html

 
Yeah, the Erse caps were going to be the ones I purchased, but they're out of stock and back-ordered according to the website. I sent Erse an email a week ago and still haven't heard back.  :(

First the 100uF Axons disappear, now the 100uF Erse. Dumb luck for me I suppose.

According to documents online the Erse caps appear to be 6mm longer than the JFX caps anyway, so JFX it is.

How did you order your JFX caps and how much were they if you don't mind me asking?
 
D'oh. I'm in the U.S...

Ahh screw it. I'm just going to run some 51uF Axons in parallel. The price is right and the size will be perfect.  ;D
 
Joshewah said:
D'oh. I'm in the U.S...
Click to expand...

Dollars work on those sites, they are just worth less.

Shoot!  I order from the USSR, Hong Kong, China & Taiwan.  Why not someone who almost speaks the same language?
 
Oh, it has nothing to do with patriotism. It has to do with price! I'm a cheapskate. :P

I ended up ordering four 51uF Axon caps for what will probably be about $45 shipped. The size ended up working well too leaving me the necessary room to place a pilot light and relocating the power switch towards the front of the chassis.
 
Another quick question, I know these big polypro caps are bipolar/axial so there's no real positive or negative.

However, I read somewhere around this forum that while they are axial there is a sort of traditional "positive" and "negative" end going the direction of the text left to right where the foil starts or something like that.

Is there any merit to this and if so would the left or right be the "positive" end?

Edit: nevermind. The info I was looking for was 8 or so posts above mine. I'm having one of those days today.  :P
 
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