[GermanGuy]

  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!

 

[goodvibes]

  Quote:

Originally Posted by spritzer /img/forum/go_quote.gif 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.

 

[earwaxxer]

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.

 

[spacequeen7]

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 

 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 

 

[brunk]

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 

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

 

[GermanGuy]

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.

 

[JamieMcC]

  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
 

 

[spacequeen7]

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

 

[JamieMcC]

  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.
 

 

 

[spacequeen7]

thanks again Jamie ,great help 

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

 

[JamieMcC]

  thanks again Jamie ,great help 

 
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.

 

[earwaxxer]

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.

 

[GermanGuy]

http://www.humblehomemadehifi.com/Cap.html

 

[spacequeen7]

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 

 

[JamieMcC]

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