[Milsurplus] [Boatanchors] Carbon Mic Rejuvination

[Richard Brunner]

Modulating spark transmission has been done.  You have to get the pulse 
rate/buzzer up high enough.  It sounds pretty good, but there is a loud 
buzz and rushing noise in the background.  It was judged not satisfactory.

A carbon mic in the antenna lead works good, but beware of RF burns on 
your nose.

Richard, AA1P


On 03/15/2013 10:44 PM, COURYHOUSE at aol.com wrote:
> the only thng that  sounds  worse is  when you try to  modulate spark this
> way
>   
>   
> In a message dated 3/15/2013 7:41:32 P.M. Mountain Standard Time,
> w7qho at aol.com writes:
>
> Technique used in the very early days for some of the first voice  and
> music transmissions....
>
> Dennis D.   W7QHO
> Glendale, CA
>
> *************
> On Mar 15, 2013, at 3:50 PM, Rob  Atkinson wrote:
>
>> you can put a carbon  mic in series between  the rig and antenna and
>> use it to modulate the RF.    Supposed to work but sounds really bad.
>> Only a few watts I  guess.
>