Output Capacitor Upgrading Questions

jrihs · 144777

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Offline Jim R.

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Reply #150 on: May 13, 2012, 06:33:06 AM
Hey Brad,

Just a tip on those motor run caps used as coupling caps -- bee sure to ground the outer casing to safety ground -- they can be a bit "leaky" and it is possible to get a zap from the case.  This is why you most often see these mounted with clamps to metal surfaces.

-- Jim


Jim Rebman -- recovering audiophile

Equitech balanced power; uRendu, USB processor -> Musette DAC -> 5670 tube buffer -> Finale Audio F138 FFX -> Cain and Cain Abbys near-field).

s.e.x. 2.1 under construction.  Want list: Stereomour II

All ICs homemade (speaker and power next)

Offline BNAL

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Reply #151 on: May 13, 2012, 08:07:59 AM
Jim,

Thanks for the advance. I'm working on a lift kit so i can fit them under the plate.

Brad Nalitt
Iron Upgraded S.E.X. Amp 2.0
Foreplay III
Quickie w/PJCCS
Eros Phono
Blumenstein Orca Speakers, Baby Benthic Subs
S.E.X.y Speakers W/FT17H Horn Tweeters
Thorens TD 125 MkII W/ Shure M97xE JICO SAS Stylus

Offline BNAL

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Reply #152 on: May 20, 2012, 11:32:53 AM
Who needs those little girly electrolytic caps, when you can have a real mans cap like these.

Well I was able to fit the 100uF motor run caps in and I still have the Russian Teflon caps as well. The Teflon caps help to keep those big caps from toughing anything. It is making music, but have not had a chance to do any real listening. I had to increase the depth of the base to fit them in as you can see in the picture.

(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fi597.photobucket.com%2Falbums%2Ftt55%2Fpnalitt%2FIMAG0189.jpg&hash=c21c55f9b5eb8cd26003aa9f1ce0664a36be109e)
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fi597.photobucket.com%2Falbums%2Ftt55%2Fpnalitt%2FIMAG0192.jpg&hash=305772294a5ed89be4ed35bd11f3c7b64d029652)

Brad Nalitt
Iron Upgraded S.E.X. Amp 2.0
Foreplay III
Quickie w/PJCCS
Eros Phono
Blumenstein Orca Speakers, Baby Benthic Subs
S.E.X.y Speakers W/FT17H Horn Tweeters
Thorens TD 125 MkII W/ Shure M97xE JICO SAS Stylus

Offline Grainger49

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Reply #153 on: May 20, 2012, 01:07:49 PM
Brad,

An extended base Crack!  Of course I love the caps.  Big caps are manly!


Offline earwaxxer

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Reply #154 on: May 20, 2012, 03:02:52 PM
Holy c(r)ap! Thems some cajones! Nice enclosure.

Eric
Emotiva XPA-2, Magnepan MMG (mod), Quickie (mod), JRiver, Wyrd4sound uLink, Schiit Gungnir, JPS Digital power cord, MIT power cord, JPS Labs ultraconductor wire throughout, HSU sub. powered by Crown.

Offline BNAL

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Reply #155 on: May 20, 2012, 03:33:33 PM
I swear I'm not compensating.

Brad Nalitt
Iron Upgraded S.E.X. Amp 2.0
Foreplay III
Quickie w/PJCCS
Eros Phono
Blumenstein Orca Speakers, Baby Benthic Subs
S.E.X.y Speakers W/FT17H Horn Tweeters
Thorens TD 125 MkII W/ Shure M97xE JICO SAS Stylus

Offline Noskipallwd

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Reply #156 on: May 20, 2012, 07:48:27 PM
In this case, I think you should say I added the Crack to a couple of Caps, versus I added a couple of caps to the Crack ;D

Cheers,
Shawn

Shawn Prigmore

Offline Cryok95

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Reply #157 on: January 03, 2013, 05:38:20 AM
Hi, been lurking around here for the past week or so. Just wanted to ask, will there be any improvement if I bypass the other 2 stock electrolytic caps in the PS (of course together with a bigger last cap and a bypass on that one too)?


Offline Paul Birkeland

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Reply #158 on: January 03, 2013, 05:46:31 AM
Quote from: Cryok95 on January 03, 2013, 05:38:20 AM
Hi, been lurking around here for the past week or so. Just wanted to ask, will there be any improvement if I bypass the other 2 stock electrolytic caps in the PS (of course together with a bigger last cap and a bypass on that one too)?

The stakes are pretty low, give it a shot!


Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline adamct

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Reply #159 on: January 24, 2013, 06:00:18 AM
Hmmm...I'm at work, so I can't see any of the pictures in this thread, but after reading the past 11 pages of posts, it still isn't clear to me what is meant by "bypassing" the caps in the power supply. I gather that I should use a film cap with lower values than the cap I am bypassing, but my questions are:

1. Is there any consensus on (roughly) what the values (uf and voltage) of the bypass cap should be?
2. What should I solder each of the leads on the bypass cap to? (I assume the stock electrolytic cap stays where it is, with no changes.)
3. Paul has mentioned several times that - at least in theory - one should solder in a resistor as well, but the problem is that you don't know what value that resistor should have. Have people generally just been soldering in the bypass cap without a resistor?

Best regards,
Adam


Offline Grainger49

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Reply #160 on: January 24, 2013, 07:19:10 AM
Adam,

The voltage must be the same or larger if you can't find the same voltage rating as the power supply cap. 

1/100 is good for a bypass.  Bypassing is putting a smaller better capacitor in parallel with the existing cap. 

I don't use resistors when bypassing and have had no problems.  The ideal way is to try a number of resistors with alligator clip jumpers then solder the final value you decide on.


Offline adamct

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Reply #161 on: January 24, 2013, 08:03:02 AM
Thanks, Grainger.

Best regards,
Adam


Offline Cryok95

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Reply #162 on: March 09, 2013, 04:25:02 AM
Hey guys, I'm looking to get some obbligato caps to change my current solen 100uf caps I have in my crack. Only thing is that I'm deciding between the 100uf PSU version or the 70uf film oil version. Any thoughts?


Offline Grainger49

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Reply #163 on: March 09, 2013, 04:40:45 AM
I like the Film/Oil in the black cans.  It has a smooth sound.  The highs are crisp, mids brought forward some.  I have 10uF Parafeed Obbligato Film/Oil (630V) in my Paramours.  They are pretty big.


Offline Paul Birkeland

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Reply #164 on: March 09, 2013, 05:52:21 AM
Quote from: Cryok95 on March 09, 2013, 04:25:02 AM
Hey guys, I'm looking to get some obbligato caps to change my current solen 100uf caps I have in my crack. Only thing is that I'm deciding between the 100uf PSU version or the 70uf film oil version. Any thoughts?

Leave the Solens in.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

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