trinityamps.com

hi every body

i 've started to tweak mi sIII by the boost switch mod
that sound very good i love it
and not to much noise !

( you can see the pics on my blog on the chassi album on the left )

http://strat777.fiftiz.fr/blog/

it sound like hendrix overdriven tone with the gain at 10 and volume at 2

i hesite a lot beacause i would like a little bit more gain
but i dont want to lose my actual sound

it is possible to do another tweak to have more gain at 10 ( gain pot )
and find my actual sound at lower gain pot value ?

i hope i'm clear enough ( very bad english )

thanks
jerome

Glad you're tweaking the amp. That's fun to.

There are several tweaks in the manual. To Increase Gain on sIII/Plexi Channel
1. Remove R8
2. Change VR1 to 1M-A
3. Change R9 to any value between 470R and 2.7K--lower values = more gain
4. Bypass R9 with a cap between 0.68uF and 47uF. Higher values = more bass
5. Increase R4 to 220K
6. Increase R7 to 220K
7. You may need to change VR7 to 250K-A or 100K-A to keep the PI from overloading from the increased gain

_________________
Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps

yes coco i read the tweaks table
but i don't understand if the differents tweaks are bounds
can i remove only r8 ( without change the master pots)?

and are there a better tweak to increase gain than other one to keep the best tone ?

thanks

Try changing the value of the boost resistor across R9 to so when it's switched in you get an effective resistance of 820R on the cathode -- lower values = more gain . Currently it's set so the effective resistance is 1.2K


If you use a 1.2K resistor in parallel with the 2.7K you will get 820R.

A subtle change but it might do it.

_________________
Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps