Purplenoise said:Measured it, it is 3.4 actually. If I am not mistaken I read in one of your posts that you used two 6.8uf 75v in series ( 3.4uf 150v sum). I found two Siemens on eBay with those values so I am gonna give it a try since it looks like a very simple and effective solution. How did that work out for you? Thanks.
Sorry, I didn't do that but I don't see why it wouldn't work. I believe Fender used to do this to get higher voltage filter caps in some amps (CBS era?).
Remember, as long as you're being safe and not exceeding the ratings of components, do what you can to set up a good comparison. The only thing that I'll add is that you should record before and after each change, listen back, wait a day, then give it another listen. I've made a decision on a component swap, then listened back to the recordings later only to find that I'd changed my mind.
Some people prefer to test component changes with instruments that have a wide frequency content and some prefer to use their voice because you know you're own voice well. I do the latter.