Which PIC are you using John? At the risk of "going over your head", have you considered losing the XR2206 chip and generating the 2125 and 2295 Hz sine wave AF directly from the PIC (using DDS-PWM or DDS-R2R)?
Vy 73, Mike, K8LH
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Re: Balloon telemetry data using radio teletype or RTTY (Baudot)
Which PIC are you using John? At the risk of "going over your head", have you considered losing the XR2206 chip and generating the 2125 and 2295 Hz sine wave AF directly from the PIC (using DDS-PWM or DDS-R2R)?
Vy 73, Mike, K8LH
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