Mesa Boogie Lonestar Classic capacitor swap

[Paul462]

Hope someone can help me with this. I have owned my Mesa Lonestar Classic for 10 yrs. and the time has come to make it better. One common complaint from a lot (not all) of Lonestar owners is that the 2nd channel has too much bass with the drive engaged. There are a few different fixes that I have learned about, but the one that made the most pronounced difference to my ears is the removal of the .005uf capacitor that is at the beginning of the drive stage in the schematic (This very schematic is available on this site) and replacing it with a .001uf non polarized capacitor. If you are looking at the schematic, look left and a little down from the word Drive Stage to see the capacitor I'm talking about. The symbol used indicates this is non polarized. My question to any of you who can help is can you show me or sell me the absolutely correct cap for this position as I'm a little confused by the number of different appearing ones available. The original .005 cap is a small cylinder shaped, The amp I heard that was modded used a disk shaped in its place. If my sound preference is a determining factor, I am all about vintage tones of the 60's. Any help greatly appreciated!

[sluckey]

Click on the "capacitor" link below this post. You can use any of the .001µF caps on that page. I'm fond of the Mallory 150 series or the Xicon series caps. They're cheap, but those expensive caps will work just a good.

[drew]

How much room are you going to have to work with?  Can you take a close-up photo of the part in question?

[Paul462]

Sluckey, thanks for the info, I had looked at the caps listed here, but I'm unsure as to how much it matters if a cap is designated non-polarized, if I can go ahead and replace with a polarized? I believe there was a statement at the bottom of the page saying something about all the caps are polarized? I've never done this procedure please forgive my ignorance, just trying to ask the right questions so I don't do a stupid move to a great amplifier.

[Paul462]

Drew, got good space where it looks like it can be done without lifting the board out, and there's room enough that a larger cap can fit if that were needed.

[sluckey]

All the .001µF caps on that page are non-polarized.

[Paul462]

Many Thanks!