[Milsurplus] Carbon Mic Subs

mac w7qho at aol.com
Sun Mar 17 01:07:19 EDT 2013


Me neither...

Circuit I use looks  like this (hope it comes through..)

     ---------------------------1K----------------------->
     |                    |                            |
     |                    |                            |
  20 mfd        Mic                      Col.
     |                    |                      /
     |                    -----------Base                       To  
carbon mic
     |                                           
\                          input ckt.
     |                                           Emit.
     |                                                |
     |                                                |
     ------------------------------------------------------>

Have found the mounting and placement  of the electret element inside  
the old microphone case (T-17 or other)
is critical for good voice quality  Also, hard to reproduce one mic  
upgrade to the next.    :^(

Dennis D.  W7QHO
Glendale, CA

************************
On Mar 16, 2013, at 3:46 PM, John Vendely wrote:

> I wouldn't bet on that circuit working...
>
> On 3/16/2013 6:08 PM, Dave wrote:
>> There is a circuit here but also read the comments lower down the  
>> page
>>
>> <http://www.electronicecircuits.com/electronic-circuits/carbon-mic-replacement-to-magnetic-mike-converter-circuit 
>> >
>>
>> Dave
>> VK4KDP
>>
>> On 17/03/2013 1:52 AM, David Stinson wrote:
>>> Have any diagrams?   Thanks!
>>> ______________________________________________________________
>>
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