Hey Gary,
Thanks for sharing that info.
FWIW I built a couple MK47's and I have the same problem with one of them that yourself as well as others have mentioned in the build thread. Since I have two, I was able to narrow it down to the one mic, and not the power supplies. I've resoldered every connection, cleaned and re-cleaned the board of flux and I can't figure it out. I guess the next thing is to start replacing the passives. I checked every resistor prior to soldered them in. There were a couple that were out of tolerance, so I replaced them prior to the build. I wonder if there is an issue with some of the Russion PIO caps, or the yellow cap? Oops, this is turning into something that should actually be attached to the build thread. . . . .
Anyway, so you didn't notice any resolution of the pops when swapping out capsules?
FWIW, if I actually have anything to add to this thread, it's that I have two original Dale M7's that I put in these mics and the one that is working well sounds so good that I don't want to touch it. It's not that often that I've gotten to a point with DIY gear, where I stop wondering what it would be like if I just switched out this or that component, but that mic with all the parts supplied by Max, plus the Skylar body, plus the Dale capsule is one of those instances. If the capsules Chuck is doing are just like Dales, I think they are a near perfect match for this circuit. Everything to me sounds perfectly creamy, but still detailed, and w/ a deep sound stage.
Haven't tried anything else in terms of capsules, but I don't really have a desire to. I just wish I could solve the popping issue with the second mic.