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I haven't looked at the RF out yet so this question may be premature but shouldn't the callsign repeat periodically on Pin 2 (Tone out) of the Atmel chip?

Upon applying power, I hear my callsign once, then a steady tone for ~10 secs or so. Then tone - silence - tone - silence at a steady rate, but no more callsign.

Thanks,

John AE5X