Thank you Gentlemen,
It is too early to say something about sound, as I just finished it and have not tryed in real situation yet. From the first tests (on my voice) I can tell that the output of the ribbon section is very hot. The overall sound is very special. I was comparing it to different mics, and definitely this one has very unique qualities. If someone has a ribbon mic, try it with ECM8000--you will get same effect.
<Very cool. Now add a remote box with a polarity reverse switch on the ribbon and a level control on the omni, and you have a completely variable multi-pattern mic. If you can add a pivot to turn the omni 90°, you have a complete M-S setup.>
My idea was to use the omni as a 'fill in' for HF roll off of the ribbon and nice cardioid pattern.
You got it! Yes, I made it for MS recording, however, I will be using THIS one as a mid, however, I made a third channel in my pre with the reverse polarity and independant level adjustments for different patterns.
<For a more traditional M/S I'd recommend the use of a WM55A cardiod capsule for the mid. The relative gains of it and the ribbon must be closely matched.>
For the Side I will be using whether another ribbon, or KK87 capsule based tube mic. When I use MS, usually I record mid and side on different channels, and then matrix them during mastering.
<Marik, you'll get a much stronger field across the ribbon if you complete the magnetic circuit around the outside of the magnets with a U shaped piece of highly permeable metal.>
I made this way for three reasons:
1) Simplicity of the construction
2) The magnets are pretty darn strong (I used N48 grade), and output is pretty hot, and won't get much higher with magnetic return circuit.
3) The thickness of this metal piece will increase lenght of signal path between front and rear and thus, will reduce high frequency cut off point.