Hello Jeff.
03 Aug 97 23:24, Jeff Edmonson wrote to Mark Magill:
 JE>
 >> JE> Actually, this isn't really conducive to anything TECHnical
 >> JE> in nature, so...
 JE>
 >> JE> Back to antennas, transmitters and recievers and other
 >> JE> technical aspects of HAM radio!
 JE>
 >> OK Tech-Guy, got a schematic for a simple tone generator
 >> I can use in my FM rig to open the repeater? Only needs to
 >> generate ONE tone, at 146.2 Hz. I could swap in different
 >> resistors with DIP switches for other tones, if it used an RC
 >> time constant or Resistive biasing of a chip to determine the
 >> frequency.
 JE>
 >> My technical background says it SHOULD BE SIMPLE! But my
 >> foggy memory can't remember the details...
 JE>
 JE> Should be simple enough to build something, with a 555 IC, and R/C
 JE> component to obtain the frequency.
Two transisters linked for feedback works just fine.  Got the schematic here 
somewhere, just need to dig it up.
 JE> However you decide to come up with the actual tone, remember to
 JE> inject it at the CARRIER level, and not in the audio section.
In the deviation section is better.  You can tell when the tone is right by 
the amount of deviation in the carrier...
JE> Remember to keep the ouput low enough to not be heard by human ears,
JE> yet detectable by the repeater reciever.  They're -supposed- to be
 JE> sub-audible ;-)
146.2hzs and higher is audible no matter the output.
... I like women with big, ummm hearts..that's it *HEARTS*!!!
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