Re: Planning to mod my Valveking 112
What are exactly the mods you want to do?
credit ilya-v)
MESA mod
It makes the gain channel million times better (exaggerating).
Mesa and Bogner like (Not exaggerating).
Remove R122 (no jumper needed).
Leave R124 in place (Don't touch it).
R116 to 10k (Wattage don't matter here).(10K has more gain, 22K has less... tightness of tone depends on EQ and setup)
The tone stack cap & resistor are crutial to Mesa sound;
C2 to 470pF
R4 to 47k
If it's too dark remove C149 (cut one leg of it).
The clean is unaffected.
You'll lose the low gain option (always high gain now, with less gain [10k]).
*But still can be very low or Very high gain.
The structure and articulation of the gain now is fenomenal .
The gain button now controlls C115 (470n) on/off, Soldano(off), Mesa/Bogner(on[tighter])
*If you liked the gain channel with a boost pedal, you'll "Die" from happiness on this mod. (it has plenty of gain now on the normal gain, and plenty & tighter gain on the
gain-on.
The Mesa mod removes the low gain mode completely.
And it lowers the high gain mode a bit and makes the sound much, much cleaner and defined but still with plenty of gain.
The gain switch now acts like a fat button.
What was the low gain (off) now has plenty of gain.
And what was with the gain boost on, now is a lot more
defined and clear.
(credit Stefan_L_01)
Just a note about the Mesa Mod: The higher the resistor value, the lower the gain. I tried once 39k and this almost disabled this stage, reducing it to the "normal" gain mode.
It´s logic, with a 100k or so you would have the cathodyan phase splitter with gain 1...
So if you want keep a noticable difference between the 3-stage gain and 4-stage gain, i´d use max. 10k. This already reduces gain a lot. You can compensate with a higher gain setting of the control, but again, the 2 gain channels get closer together.
If you need a low gain rock tone and a high gain mode ( cover band ), leave it the way it is, or increase it slowly and find the best setting for your style mix (2k, 4k, 10k, 20k).
credit ilya-v)
*Also made the Distortion channel tighter by changings the C103 from 2.2n to 1n.
made the bass roll off at 700hz (300hz old).
*Removed the A/AB class Pot. (Made the amp alot louder) no **** in the signal.
(Credit ilya-v)
About the R100 mod:
Remove the resistor and slam a 1M pot there.
What do you think the Noise Gate on the Peavey JSX is?
http://ultimate-guitar-valveking.wikispaces.com/Amp+Mods+-+Electronics
I got my soldering skill because I work in electrical assembly. I like the Valveking tone already, I just like to tinker and make things preform to my specifications(mostly metal amp) so the Mesa mod and the other stuff would make the amp better for my needs. 
