[aprssig] FRS radios and PTT

Stephen H. Smith wa8lmf2 at aol.com
Mon Mar 14 13:39:29 EDT 2011

On 3/14/2011 8:53 AM, Bob Bruninga wrote:
> Just did a circuit to be able to key a VOX radio either with audio or
> keyline without having DC connectivity.  Just a single transistor twin-T
> oscillator set to 4.5 KHz.  Either VOICE can key the radio,

Huh?   What does this mean? What two voices?

> or I can
> manually key it over a long wire without having to turn the VOX on/and/off
> (from front panel buttons).

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