Go Back   Home > Forums > Design & Build > Parts

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

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
Reply
 
Thread Tools Search this Thread
Old 25th October 2005, 01:54 PM   #1
diyAudio Member
 
Join Date: Oct 2005
Default Replacing components on Creek 4140

My Creek 4140 integrated (2 channel) amp began blowing the AC mains fuse but not the two fuses inside the case. I contacted Creek technical support and they recommended changing the transformer. I have ordered a new transformer but was also going to replace the power supply caps with newer polarized electrolytic caps. While I was doing that, I might as well replace the diodes, op amps (by the way -- any articles on which op amps are better?), and other caps.

My question is that I have two large 6,800uf capacitors. I've found some nice capacitors of the same capacitance. Can I also put in larger capacitance caps (say, 10,000uf, which will fit in the case). Would there be any benefit to doing so?

I do have part of the power supply circuit diagrammed out, but this is a tedious process. Does anyone know where a circuit diagram for the Creek 4140 would be?

Thank you!
  Reply With Quote
Old 27th October 2005, 06:42 PM   #2
Banned
 
Join Date: Oct 2005
The Creek 4140 is a wonderful transistor amp build by english engineers, BTW they are tube fans. Once I tested a 4140 against 2 Krell monos and guess what - 8 people couldnt tell the difference!!! This shows again what a rip-off Krell and many other high priced transistor amps are.

Now to the subject, I don't have a schematic but I would recommend ultra fast diodes with 0,01 to 0,033 caps in parallel, good sounding large caps like Elna or Epcos with parallel caps (matter of taste) and Analogue devices op-amps. I would also cut all the pcb signal lines and replace it with pure silver wire max. 0,5mm. Don't forget to clean the speaker outposts - very important with this amp due to the material they used. Get rid of the plastic feet - very nasty sounding indeed - and replace it with ceramic/kevlar/carbon or something alike, even pocellan is better than metal or plastic.

I've done all this for 2 friends of mine, they were shocked about the gain in detail, space, speed and clarity.
  Reply With Quote
Old 28th October 2005, 02:32 PM   #3
diyAudio Member
 
Join Date: Oct 2005
I like the 4140, especially considering the price. I've ordered two sets of capacitors for the main PS capitors, one set at 6.8mf and one at 10mf. In order to repair the 4140, I'm going to replace the PS caps and the transformer. I've ordered all replacement capacitors in the signal path, diodes, and op amps, but those will have to wait awhile. I may also initially put in the 6.8mF caps and wait until I have time to test how the 10uF caps would work. Additionally, I may diagram out the entire circuit, as I'd like to begin reusing my EE skills (once a practicing EE, I'm now a patent attorney). I'd like to plug at least part of the data into a program like Tina and see what if any effect 10mF would have as per 6mF caps on the PS. I can then use a scope and verify the effects.

I'm also interested in seeing what happens when I replace the diodes, etc., but that will have to wait awhile -- I have to insulate my house, which will likely take all my time the next three weekends.
  Reply With Quote
Old 28th October 2005, 08:23 PM   #4
Banned
 
Join Date: Oct 2005
The thing with the ultra-fast-diodes is not solved yet. Nelson Pass don't like the ufd's, but maybe they sound too clean (analytical) on his amps. I think it's a good idea at least for the Creek - more speed and detail is recommended for this smooth (maybe too smooth) amp.

It is strongly recommended to replace the original signal caps with Solen or something alike. The Solens are cheap and very fast & dry but a little distorted in the highs. The solution for this problem is also cheap: use a Sprague Orange Drop 0.001 in parallel and you can compete with the most expensive caps sold out there. At least in the speed department you can beat the hell out of some nasty overprized caps.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Creek 5350S Roar Malmin Solid State 2 13th November 2008 01:58 PM
Creek 4330 5u4 Swap Meet 0 12th November 2007 04:50 PM
WTB: 6 North Creek d25's bhg41088 Swap Meet 0 29th December 2004 08:37 AM
north creek d28 pxr5 Multi-Way 4 1st November 2004 05:15 PM
Marantz 4140 integrated amp blixco Swap Meet 2 22nd May 2004 05:11 PM


New To Site? Need Help?

All times are GMT. The time now is 02:03 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2