Generally speaking, changing the value of a capacitor in an amp will change the performance. Depending on the circuit, it can also cause oscillations which range from making the sound terrible to damaging the amp. What you can do is combine smaller caps in parallel so that they add up to 4.7 uF.

A New Industrial, mid-price Cap.  Cornell Dubilier 942C     A little while ago, I stopped by Tony Gee's Capacitor Reviews and found he recommended a new cap, the CDE 940C.  Since I was going to place an order for parts anyway, I looked for and found them at Mouser.  While researching Tony's...

RIKE S-CAP Caution   I reviewed and recommended the Rike S-Cap earlier in this thread.  I can't disclose the source, but there is a possibility that later builds of the S-Cap don't sound the same as the early build parts I reviewed.  I don't want to condemn Rike, after all, it could be an...

  My mistake.  Sorry.  I had remembered those as MBGO, but looking at enough pictures to sort out the Russian lettering, it turns out that they are OKBG-MH.  From what I understand, they are similar, but obviously can and do sound different than the MBGO-2.  Not sure what they were designed...

Jasper,   This post is not intended to contradict your evaluation, but just to note that every system is different and will respond differently to different caps.   I read with interest your evaluation of the MBGO and MBGCH-1.  I remembered that I had a pair of MBGO on hand that I had never...

I can suggest one idea for a high temp potting material, but I haven't tried it on a capacitor, so I don't know the sonic effects, if any.   Devcon 2 Ton Epoxy (Devcon 35345) is an epoxy that is available at local home and hardware centers here in the US.  I'm not sure if it is available in...

This is a really weird problem.  Still running a Mac Mini on OSX 10.9.5, now with Firefox 36.0.1.  For the last week or so, everything has been fine.  One click opens the drop down menu, one click logs me out.  Then today, the old problem returned.  I have been trying for 5 minutes straight and...

Nice report.  I have got to make some time to play with them.   One thought since they are a bit stronger at the bottom than the top.  It might be fun to cut away the outer aluminum can as Jon and others have done with other caps.  Since it is a paper in wax cap, I expect it will be dry...

Hi Jasper,   I'm glad to hear that you are having fun trying caps and especially with the Russians.  I am particularly glad to hear your thoughts on the MBM caps.  I had bought some small ones a while ago, but haven't gotten around to trying them yet.  From your experience, it sounds like they...

Hi David,   Could you explain a bit more about your usage?  What do you mean by a power supply coupling cap?  Also voltage requirements?   Jac

Sorry, I should have of that before.   I am using a Mac Mini on Mavericks 10.9.5 and Firefox 34.0.5.  Since posting, I have tried loging out on my work computer an HP laptop (sorry, forgot the model) on Windows 7 and using Chrome to access Head-Fi and don't see the problem, so you are correct...

First of all, thanks for a great site.  I find it very useful.   This is a minor page organization thing.  When I go to logout, there are active advertisements under the drop down menu where the "logout" button lives.  When those ads update or just move active elements, the logout button...

K75 are great in some systems.  But there is definitely a measure of luck to make it work.   As others have said, it depends on the system and how you are applying it.   I recently did a coupling cap (1.0 uF) comparison recently that included Mundorf Silver-Oil, Supreme, Rike S-Cap, and a...

I have had a similare experience with FT-1s.  From three batches, it seems like 1 or 2 in 10 arrive bad.  I contacted the seller, told him so many were out of spec, and he refunded that portion of my order.  I haven't had this trouble with any other Russian caps, including other teflon caps, but...

I use a password manager (LastPass) to try to stay a bit safer online.  On LastPass, there is a security challenge that checks every website that I log into.  At the moment, the only "vulnerable" website on my account is Head-Fi.org.  One of the likely problems is that many forums haven't...