[Boatanchors] SIMPLE Carbon Microphone Substitute.

[David Stinson]

Been working on a simple substitute for the Carbon 
microphone used with the BC-669.  I've seen some
multi-IC, 3-dozen-part designs which hugely violate
The Law of Pernicious Parts Count:
     "Every part in a project beyond about eight
     reduces the number of people who will build it
     by 50%."
So no one builds them.  I hope this one 
will get tried and improved:

https://goo.gl/photos/26HUmzVuqhZKWrNZ7

Cobbled it together and it works well with the BC-669.
I picked that transistor because it was the first one 
I grabbed from the "NPN Small Signal" drawer and
my Android phone called it "General Purpose."
Other common NPNs will likely work as well.
The electret element isn't mark +/-.  I soldered it in 
one way and it didn't work.  Turned it around and it did.
Will try it on other rigs as the weekend goes on.

73 DE Dave AB5S