Not sure if this is fair to call this "your mod" - I think this info was bandied about USENET back in the day...
Originally published: http://sound.westhost.com/project58.htm
Siegfried Linkwitz, Shaped Tone-Burst Testing, JAES, Vol. 28, No. 4, April 1980
http://sound.westhost.com/project93.htm
That's actually not my mod... This shows a two wire capsule that is converted to three wire. My mod converts a three wire capsule to two wire and gives you the same performance as this mod except my mod is backwards to this one. And for the record I have never seen this mod but like most things in electronics. I am sure its been done before, I was the first one to figure out why some AT capsules were distorting. I found a way that is similar to this mod except that my resistor goes from the negative side of the capsule to ground and you only connect the ground side of the resistor + the output of the capsule. So I guess I can say that the 4.7k mod I do is in fact still my mod..
I am not someone that takes other peoples ideas and says they are my own. To my knowledge no one has done a mod exactly like the one I have done.. Linkwitz actually ended up with a better mod then the original one shown here. But its much more complicated then my mod.
If you take a three wire capsule and take the Negative side of the capsule connect it to ground then take the ground side and connect it to audio ground and the positive side for output you have done my mod. The problem has always been that 2 wire mics always distort, when I started building mics I needed a way to use the cheaper cable lol because I could not afford mogami. I needed a mod that would work on two wires so that's why I came up with it.. I wanted to not have to use three wire mics with three wire battery boxes but still get three wire performance.. No big mystery.
What Linkwitz did was convert a two wire capsule into three wires. I wanted to go the other way round. But I did not copy his design I came up with this all by my self. Using a low distortion source @1k @114db and changing resistors until I found the right value that allowed for maximum output and minimum distortion 4.7k happened to be the right choice. I dont understand why I only know that I tried every other value I could and nothing worked better then 4.7k I did not read about linkwitz and copy his idea..
PS.. The mod below is the only 2 wire Linkwitz mod I have ever seen.. And its nothing like my mod.. Even the mod you posted is not exactly like my mod.
Chris