Carvin X100B Head mods

[msmith40]

So that original C7 cap is still attached by 1 leg, correct?
But basically is no longer part of the circuit?

THANKS!

 

[aaronsg71]

i'm uploading the video now, but it says 174 minutes to complete...so watch it afterwhile. lol

I’m new to the Carvin x100b and wondering if you are still playing it and in this forum? Thx

 

[Ponsarelli]

I believe what is meant is to lift one leg of the cap, leaving the other leg attached to board. Then solder in-line to the lifted leg of C7 with the cap the resister/cap parallel combo. This means solder one end of resistor/cap combo to lifted leg of C7, then other end of resistor/cap combo to where C7 lifted leg was originally going and lifted from. Now your signal path is C7 -> resistor/cap combo -> terminate to original C7 point (where leg of C7 was lifted)

 

[JimAnsell2]

i got the old x100b tolex version as part of a package with a SUPER ugly (like someone wrote "i'm going to fucking kill you" or something to that effect in giant, fat, permanent marker on the side, then someone tried to wash it off, and just smeared it everywhere) 70's marshall fawn colored 4x12 with the original black backs for $400 total from someone living in a small house, and i think his gear was the only thing in the house. got drug fiend vibes... this was in 2003-4 ish...
anyway, that fucking amp SMOKED. with an sd-1 in front of it, it sounded like the best jcm 800 style tones from classic albums. Every other x60 or x100b i got after that one sounded terrible. the ones with the rat fur and the "hot mod" or whatever, were worse.

were those known for being super inconsistent or something?

 

[jjschessmaster]

Hey All, got me a carvin XV212 with the rat fur and decided to do the mods and then some. The BFG mods are truly a game changer for the amp and took that weird compressed buzzy lead channel into more of a modded, thick marshall.

A couple notes on my mods.

- the optional mod to lift C36 is great. It takes away lead drive but tightens up the hi lead in a really nice way. I ended up putting that on a switch to keep/remove from the circuit.
- I couldn't really decide how I liked the c2 mod. 0.68uf was definitely tighter than the 1uf but there was something about the 1uf I liked in normal drive. I ended up switching back and forth and liked the 0.68uf but also tried a 4.7uf to help with lower, more classic rock gain tones. I ended up doing a on-off-on switch to do .68uf, 4.7uf, and no cathode bypass cap.

This brings me to a question for the smart folks here...I love the lead channel with no bypass cap on c2, c36 lifted and master wide open. Its just a super pleasant clean tone, but I need the master cranked. Is there a way to get a little more volume out of the lead channel when im basically running it with the cathode bypass caps lifted (other than tossing a boost in the loop)? The on-off-on switch is a dpdt so I have a spare side of the switch to work with.

 

[jjschessmaster]

Also I saw over start the gearpage forum some more trujeque mods on the clean channel? Any one try these mods to get more "tube" out of the clean channel?
https://www.thegearpage.net/board/index.php?threads/carvin-x100b-amp-mods.1730567/