I started the mic build for my friend. Everything went really well until I realized I was out of M2.5 screws to fasten the PCB. I know I *HAD* those screws at one time, but seem to have lost them when I moved out of my office at the makerspace. I ended up ordering another bag of them since I will be needing them.
Once those arrive I will wire the transformer, and then apply power and bias the FET. That is if we don't release the magic smoke,
OK, I soldered up the first of our boards that we did for this mic project. I noticed one minor typo on the board we'll fix, but other than that they seem perfect. Can't wait to hear this one with the new capsules.
I built another gar2520 opamp for my 3rd #500SeriesAPIClone . Prototype no. 1. The one that lives in my lab to test mics with. I don't know why I only ordered parts for 2 opamps the first time around, but I remedied that. I have a ton of opamps of other designs, so I had been using it with a spare, but now it's as it should be.
I also changed out the inductors in the 2 FET847 boards to the smaller ones they didn't have in stock when I originally ordered the parts.
I ordered some inexpensive capsules for the next iteration of the FET847 mics. These capsules are new on the market, and they were developed by one of the members of one of my DIY forums. The mic gurus up there have tested them, and say they're top notch, so I can't wait to try them in a build.
They're actually K47 capsules with a slightly different frequency response (on purpose) than traditional K47 capsules.
A friend and I decided to roll our own boards for this FET847 mic project. Now I can make the mics more cheaply. Plus it's fun doing your own stuff.
I ordered these little logo plates a few months ago from my panel guy, and I finally got to use one on the FET847 mic.
I used almost no glue, but some still squeezed out along the edges. I cleaned it up as good as I could without scraping away the black finish on the bodies, but you can still see a little.
Anyway, chalk it up to the learning curve.
Tomorrow I am going to try to attach one of my logo plates to the body of my FET847 mics.
So it looks bitchin pro.
I took a nude of my FET847 mic since some people asked for it. I'll also post the clothed version.
OK, so FET847 #1 is done and sounds pretty damn cool if you ask me.
I'll take it a bit apart and show pics next week since I forgot to take pics as I was assembling it.
Ricardus