Well you really don't change R131, you change the LEVEL of signal it works with...
R131 and (See Graphic below inclusive R130) set a "gain" of the Mic limiter...so keep the 10K and the 1.5K where they are...
- You may have a Diode to control the DIRECTION of power escaping the Base of TR26 while others are Pre-Set to ON Class A...R130 or VR12 (per model)
You change the OUTPUT of TR26 instead.
Locate R127 a 1M (Brown Black Blue) - change it's value to a lower, much lower value - like 1K or even 680 - 560 ohms...
The other side of TR26 looks at the AM Regulator - R166 and R165 - a simple divider - increase R166 to as high as 10K and REDUCE R165 to 1K - gives you a bigger window of drive for AMC...this affects the circuit you messed with earlier - R195 taps R166 and R165 - once you have R166 raised, and R165 lowered - you can leave the mess you were working with.
Giving away my secretes (AGAIN!)
[ATTACH=full]44965[/ATTACH]
Why keep R131? Well, you can remove it, but if you run an amp - you might want to keep the ability to limit the input swing so you don't blow up the amp - especially if you are segue-ing to using MOSFET's in the near future.
TR26 is on all the time, you tip the balance, scales or the waterfall effect - by changing the power available to flow across the Collector and Emitter - leave the Base alone, you can make the R131 and R130 (per graphic) equal - but that's not going to change much...The Diode forces AMC to work more towards Negative - the valve effect the Diode has, pertains to this.
Think of TR26 as a Common Base amplifier, then you can figure out the rest a lot easier by just fiddling, fixing the power flow thru TR26 by changing R127, R166 and R165 - leave the ALC alone to fend for itself...
