Except for these facts:
- the 555 will put out square waves, thus needing
filtering of some kind.
- the 555 isn't too stable frequency-wise, although it
might be good enough for some voters.
Tried all those. There are some XR oscillator chips
that put out a sine wave and are a lot more frequency
stable.
Bob M.
======
--- [EMAIL PROTECTED] wrote:
>
>
> Thanks Skip, thats a great idea.
>
>
>
> In a message dated 5/14/2008 11:12:02 PM Central
> Daylight Time,
> [EMAIL PROTECTED] writes:
>
> Use the layout of the Cetec Vega Encoder found on
> the repeater
> builder web site and simply replace the crystal
> controlled
> tone encoder section with a simple tone generator
> along the
> lines of a 555 timer chip. Works great, cheap and
> easy...
>
> cheers,
> s.
>
> > [EMAIL PROTECTED] radio50
> >
> >
> > Does anyone have a good circuit to use a
> non-spectra tac receiver
> with a voter? That is, besides the one on the
> Repeater-Builder web
> site. Alternatively, does anyone have any status
> tone encoder cards
> for the Spectra Tac?
