D-104 mic mod

[W9BHI]

Does anyone remember who made a D-104 mic upgrade that had a round pc board with an electret element in the center with bass & treble controls that fit into the head of the mic?
It was a couple of years ago.
Thanks,
Don W9BHI

[KA3ZLR]

Hi,

Here's a Mod that includes all parts you build it yourself go to radio shack get that little eletret condensure element they sell.

73
Jack
KA3ZLR


http://cbradiomagazine.com/June%202007/Resurrecting%20a%20dead%20D-104.htm

[DMOD]

Here's others:

http://www.qsl.net/hcara/D-104.htm

Use a 1k or so for phantom power from the battery to the electret.

http://www.electronicecircuits.com/electronic-circuits/condenser-mike-pre-amplifier-circuit

Here is a dedicated chip just for Electrtets:  http://www.maxim-ic.com/datasheet/index.mvp/id/3507

[KA2QFX]

There were two guys from Maine that I met at the Marlboro, MA fest...  they made a round board for the D-104 that's loaded with surface mount components to create a pretty effective bandpass filter/compressor/limiter etc.
If that's the board you're referring to I'm sure I can track down somebody who knows exactly who they are. 
IIRC that board was in the $80 range. 

Mark