"Roln" ) writes:
I've found lots of pictures of homebrew mics on the web, but I need info and
pictures on HOW to build one. Detailed instructions is what I need.

Roln


The cartridge is the microphone. The casing is really just there to protect
the cartridge, make it easier to hold, and have a place for a push to talk
switch.

While the case could affect the operation of the cartridge, I'm not sure
this is really that relevant in a microphone intended for speech. More
important, I doubt most of those "build your own microphone" articles
concern themselves with this. Someone finds a neat box or case they
can put the cartridge in, or maybe they look for something that will
work. So realistically, there isn't much to those articles, beyond
maybe giving someone some ideas for how they could do the same thing,
but differently.

Find a case or box that you find comfortable in your hand. Find a suitable
switch. Buy an electret cartridge, or pull one out of a tape recorder,
cellphone, cheap telephone, or cordless phone (and probably other consumer
electronic goods). Drill a hole for the sound, and mount the cartridge
behind it. Use some of that silicone stuff, the proper name escapes me
at the moment, to hold the microphone in place. Drill a hole for the
switch, and if it doesn't mount on the case, you'll have to figure out
a means of mounting it behind the case. (If I was buying cheap, I think I
might try one of those pushbutton switches used in VCRs and other consumer
equipment, though I don't know their lifespan, and they might not be
the best choice in terms of mounting.). Wire it all up, someone else
detailed this in the thread. Try it out. If it doesn't sound right,
then maybe fiddle with where the mic is mounted on the case. Or find
another case. If it isn't comfortable in the long run, maybe the
switch isn't really suitable for holding down for long periods, then
try again. Unless you are spending big money on the case, the parts
are pretty disposable because they are cheap.

Michael VE2BVW

"KLØS" wrote:
Check out the upcoming December issue of QST....I believe there will be an
article describing the construction of a homebrew mic by Sam Kennedy
KT4QW.

Dino KL0S/4