[Icom] SM-5 microphone schematic needed

[j. keith carter]

Hi Pamela; A good number of years back I discovered that the SM-5 Mic that I
had was not the one that was in my manual for the radio, and inasmuch as I had
added a linear with disaterous results from RF feedback, I sketched out the PC
board and generated a schematic. I have scanned it as a bitmap and if you have
not received one yet let me know and I will e-mail direct. It also shows the
bypassing that was necessary to keep the RF out. Can't remember where I got
the bypass info from but I think it may have been in QST. Regards and 73,
Keith, VE3JKC. A ps, I also sketched the board with the other components shown
so I can scan that as well. JKC.

Pamela wrote:

> Hi,
>
> Sorry about the duplicate post if any, forgot to put the subject line in.
>
> Does anyone have a  data sheet / schematic for an SM-5 microphone that has
> the 3 transistor circuit?
>
> Any and all info greatly appreciated.
>
> 73, Pamela - N1ZKH
>
>