251 clone w/ relay pattern swiching works!

Here is the 251 clone I have been working on, built in a Apex 460 body, with relay based pattern switching. It has a Peluso capsule and a Cenimag tranny, and is working wonderfully.
http://www.flickr.com/photos/33479004@N02/?saved=1
All that was needed to mod the existing power supply was to replace the 2 68 volt zeners with a 120 volt, remove the voltage pattern switching and replace with a 3 pos (center off) switch, pulled to ground. I freed up pin 4 on the mic cable so there were 2 lines for relay control. The relays use the heater V for common power ( the power supply uses a 7806, with the ground leg tied through a 4007 diode, this brings the voltage up to 6.3 Volts...)
I did fab up the capsule mount, as the factory mounts put the capsule too high, and removed the inner screen layers.
I will use the relay switching on my U47 clone next, much easier than trying to fit switches in the mic body

very nice work, how does it sound??

Best

Pete

It sounds great! Very present & big.
I will work on getting some sample clips.... I do not have an original to compare with, but sofar I like it better than the C12VR I have access to.
It seems to me that the simple pattern switching circuit is what makes the big difference in sound between the C12 and the 250. This is why I have persued relay switching instead of just using the bias voltage.