(G)SSL - Ratio Board

could anyone explain how the Ratio control works, please?

Jakob wrote: "The sidechain signal that is obtained after the VCA is then full-wave rectified by two TL074-stages, and at this point an offset is added - and signal gain is controlled - by the ratio switch. The ratio switch actually changes the threshold a bit to compensate for level flukturations caused by different ratio settings."

i added the 1.5:1 Ratio mod to my builds (based on jwhmca's post in another thread), but i experience gain difference in 1.5 vs the other Ratios.
which resistors to change if i want to adjust it? and which are for the threshold control?



thanks

now im testing the Original Ratio Board (2/4/10 : 1) separated, and here is what ive found:

first i started with measuring the resistance between A and B pins - for "safety" reasons i used 2 different (and cheap) multimeters. the measurement surprised me, because depending on the multimeter's range set i got different results. (please note im still a noob)

with NO V+ and V- applied to the circuit i measured:

2:1 = 150k-ish @ 200k range, but 233k-ish @ 2M range. the other DMM measured 253k-ish @2M range (the 200k range was overloaded)
4:1 = 422k-ish
10:1 = 1M72-ish

i think this is because the 1N4148 is in the circuit and the 2 multimeters send slightly different voltages at different ranges (am i on the right track?)

now, here are the results with V+ (+11.97V) and V- (-11.76V) applied to the circuit:

2:1 = 1.025 V
4:1 = 3.44 V
10:1 = 13.95V

all these are the average of the 2 multimeter's result.

so.. are these voltages right so far?

and here are my measurements w/ the Modded Ratio Board (1.5/2/4/10 : 1)

V+ : +11.97 V
V- : -11.76 V

1.5:1 = 0.626 V
2:1 = 1.088 V
4:1 = 3.63 V
10:1 = 14.96 V

so the 10:1 seems to be almost 1V higher than in the Original version. what effect this has on the unit's behaviour?