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Orgy of Capacitors: The Cap Thread - Page 29

post #421 of 656
Quote:
Originally Posted by mcandmar View Post
 

These articles have probably already been posted in this thread, but should be required reading.

 

http://www.scribd.com/doc/2610442/capacitor-sound


great articles! thanks a lot!

post #422 of 656
Quote:
Originally Posted by Faust2D View Post
 
Quote:
Originally Posted by spritzer View Post
Looking good!! It is very true that the only thing a good cap does is to mangle the sound a bit less then the other, lesser caps.
I would even say mangle the sound differently than the lesser cap

But not necessarily less that the added circuitry involved in not needing one.:wink_face:

post #423 of 656
Quote:
Originally Posted by GermanGuy View Post

thanks all of you for your recommendations!

@brunk - the mkp4 are much smaller, lower voltage, but simply do not nearly sound as good as the mkp10. also wima mentions the mkp10 for audio use.

@earwaxxer - the amp is battery biased, so no cathode bypass capacitor. but i had the idea to replace or bypass the 100 microfarad electrolyte capacitors used to stabilize the anode voltage by film capacitors (mundorf zn?) in my final build. worth a try?


Hey GermanGuy - I for sure would replace my electrolytics with film if you can affort it, especially something around only 100uF. Go with a Mundorf of some flavor. Doesnt matter what kind as long as it can handle the voltage. Electrolytics are unstable and can fail, compared to a good film cap. I sleep better at night.

post #424 of 656

I need you expertise guys..I want to replace a pair of film caps  on my recently acquired Crack with speedball and I was told that I need 100uf 250v  film caps,I'm new to recapping (only did Aune T1)

so please can someone recommend good caps on the budget that will last -I was going to order "silver in oil" Mundorf but then I was reading this 

Quote:
 I used this capacitors in several tube amplifiers and all the capacitors lost his values due the heat (50Cº to 60Cº) in a few hours (Less than 200h) 

 here are few I round it up 

http://www.madisoundspeakerstore.com/tin-foil-caps/mundorf-2.20-mfd-tin-foil-cap-250v/

rest of tin-foil

http://www.madisoundspeakerstore.com/mundorf-tin-foil-caps/

 

http://www.ebay.com/itm/231098197223?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

 

the only 100uf 250v  film caps I can find are Muldorfs mkp

http://www.partsconnexion.com/capacitor_film_mundorf_mkp.html

 

I really like to get obbligatos but  can't find 100uf 250v

http://www.partsconnexion.com/capacitor_film_obbligato_oil.html

 

P.S. I don't want to loose bass with this upgrade and I want to make sure they will fit in the box without making risers 

 

Thank you 


Edited by spacequeen7 - 2/24/14 at 11:45am
post #425 of 656
Quote:
Originally Posted by spacequeen7 View Post

I need you expertise guys..I want to replace a pair of film caps  on my recently acquired Crack with speedball and I was told that I need 100uf 250v  film caps,I'm new to recapping (only did Aune T1) so please can someone recommend good caps on the budget that will last

 

 

P.S. I don't want to loose bass with this upgrade and I want to make sure they will fit in the box without making risers 

 

Thank you 

I use these, great value and no risers needed :smile:

http://www.parts-express.com/dayton-audio-dmpc-100-100uf-250v-polypropylene-capacitor--027-447


Edited by brunk - 2/24/14 at 12:08pm
post #426 of 656
Quote:
Originally Posted by earwaxxer View Post


Hey GermanGuy - I for sure would replace my electrolytics with film if you can affort it, especially something around only 100uF. Go with a Mundorf of some flavor. Doesnt matter what kind as long as it can handle the voltage. Electrolytics are unstable and can fail, compared to a good film cap. I sleep better at night.

 



thanks for your recommendation! btw, the amp is fully battery driven, the anode voltage is lower than 65 volt.
post #427 of 656
Quote:
Originally Posted by spacequeen7 View Post
 

I need you expertise guys..I want to replace a pair of film caps  on my recently acquired Crack with speedball and I was told that I need 100uf 250v  film caps,I'm new to recapping (only did Aune T1)

so please can someone recommend good caps on the budget that will last -I was going to order "silver in oil" Mundorf but then I was reading this

 here are few I round it up

 

P.S. I don't want to loose bass with this upgrade and I want to make sure they will fit in the box without making risers

 

Thank you

 

Hi I am using the JFX 100uf 250v premium film caps I found they are a little smaller which made them easier to fit. They are made by JB Capacitors in china who I believe are the OEM manufacturer for the ERSE Pulse X of the same value. If you look the specifications and write ups save for the change in product name.

 

I have some impressions on them and other mods maid to my own Crack in the link below

 

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

 

Also you will be able to use capacitors with a higher voltage value ie 100uf 400v this I think is the value of the obbligatos that you might have seen used. They are quiet large capacitors by the way.

 

This might help prices are approx

 

The  Obbligato 100uf 400v +-10%                    45mmx90mm @ £30each

The JB JFX 100uf 250v premium film +-3%     48.5mmx59mm @ £22 each


Dayton 100 uF 250 V caps in his bhc are          51mm x 77mm  @ £23each
 

For size reference a pic of Mike B's Crack with the  Dayton 100 uF 250 V caps fitted.


 

and below with the JFX

 


Edited by JamieMcC - 2/24/14 at 1:14pm
post #428 of 656

how you attach them to aluminium ?..also i noticed your pot (earlier-different pic) ..any smaller recommendations ? 

 

Thanks guys 

post #429 of 656
Quote:
Originally Posted by spacequeen7 View Post
 

how you attach them to aluminium ?..also i noticed your pot (earlier-different pic) ..any smaller recommendations ?

 

Thanks guys

 

The Blue Alps pot is popular and about the same size as the stock one and can be seen fitted to quite a few bhc's.

 

As for fixing one of these for each cable tie.

 

 
post #430 of 656

thanks again Jamie ,great help :atsmile: 

 

EDIT; there seems to be a hassle to get JFX in US ..will probably end up with Dayton


Edited by spacequeen7 - 2/24/14 at 1:43pm
post #431 of 656
Quote:
Originally Posted by spacequeen7 View Post
 

thanks again Jamie ,great help :atsmile:

 

EDIT; there seems to be a hassle to get JFX in US ..will probably end up with Dayton

Any of the above capacitors would be a good choice, I decide on the JFX partly because I could source them locally and also trying something new appealed.

post #432 of 656

I know what you are driving at - I have the Bottlehead Quickie - done extensive mods on it. Super fun kit. Well worth it BTW. From my experience, I wouldnt worry about the quality of the film caps except for the coupling caps that are in the signal path - thats were you want the silver/oils. Those 100uF caps, go with Mundorf MKP's with no hesitation. In a pinch, you could probably go with lower values. I would CK with Bottlehead on that.

post #433 of 656
post #434 of 656

hey guys I have quick question ,I'm replacing caps (like the two above) and was wondering if I can use 22 Gauge copper wire instead of 20 Gauge ?

 

EDIT;it seems to work just fine 


Edited by spacequeen7 - 3/1/14 at 2:29pm
post #435 of 656

Those yellow and black caps look like could do with one of these stickers on them

 

 

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