Order Tray | Contact Us | Home | SIG Lists

[aprssig] Mic-E and HTs

Robert Bruninga bruninga at usna.edu
Tue Dec 13 20:59:51 UTC 2005


>>> wa8lmf2 at aol.com 12/13/05 1:37 PM >>>
>bruninga at usna.edu wrote:
>>Ill draw it...
>
>I don't see how the second half of your diagram 
>(the part labled "Combined PTT" could possibly work. 
> You show one side of the mic element grounded all 
>the time with PTT button then grounding the other 
>side, thereby shorting out the audio.    

Argh, your right.  I was too quick to draw that.
I fixed it now with the typical 2.2k resistor...

http://www.ew.usna.edu/~bruninga/mic-ePTT.GIF 

sorry,
Bob






Stephen H. Smith    wa8lmf (at) aol.com
EchoLink Node:      14400    [Think bottom of the 2M band]
Home Page:          http://wa8lmf.com 

"APRS 101"  Explanation of APRS Path Selection & Digipeating
  http://webs.lanset.com/wa8lmf/DigiPaths 

Updated APRS Symbol Chart
  http://webs.lanset.com/wa8lmf/miscinfo/APRS_Symbol_Chart.pdf   


New/Updated "Rev G" APRS     http://webs.lanset.com/wa8lmf/aprs 
Symbols Set for UI-View,
UIpoint and APRSplus:











More information about the aprssig mailing list