I used the BITX condenser for a couple of reasons:
1. It came with the BITX, so I know that it is a working unit.
2. It fit in the microphone shell without modification.
3. I could not use the PC board used in shell because it uses a common ground, and the BITX does not. Wiring up the condenser is trivial when compared to having to reconfigure the board.
Thanks for the source to mic's... Wish I had it when I bought this one!
Thanks for all the feedback.
John McGrath, KF6EFG