[simpits-tech] intercom

[David C. Allen]

At 08:10 AM 5/14/2004, you wrote:
> > If there is sufficient interest, I will contact Mr. Johansson to find
> > out if boards are still available. If not, I will see if he has the board
> > layout
> > that I can have more boards made. I will be working on a military version
> > in the mean time.
> >

Just add a 400Hz audio oscillator, and inject it into the side-tone, with 
an variable resistor, and use a control switch to turn it on or off 
depending on if ac power is available.


>One enviromental "effect" that is _very_ important is the ever-present
>400Hz "hum" in the radios.  This is not found in single-engine utility
>aircraft (Cessna 172 and the like), but is present in commercial airliners
>and fighters.  It would be cool to find a way to generate that hum in the
>board you make.  :)
>
>g.
>
>
>_______________________________________________
>Simpits-tech mailing list
>Simpits-tech at simpits.org
>http://www.simpits.org/mailman/listinfo/simpits-tech
>To unsubscribe, please see the instructions at the bottom of the above 
>page.  Thanks!