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jgindc1@...
Using the DRAWS hat, I have had good success with AX25 packet using a Kenwood V71, for example, running XASTIR, or sending and receiving winlink messages using PAT. However, when I substitute my FT-817 for the V71, using the same cables for data and rig control, the DRAWS DIN-6 connection appears to "short" the audio from the FT-817 to ground. Disconnected from DRAWS I see the FT-817 signal strength meter indicate the presence of a received signal and the audio is heard on the radio's loudspeaker. I am also using an oscilloscope to monitor the signal on pin 5 (1200 baud) from the FT-817. When connected to the DRAWS DIN-6, left or right, the audio is not heard in the loudspeaker (though the radio's signal strength meter still indicates the presence of a received signal), and the signal shown on the oscilloscope goes to zero. Thinking that this might be a loading issue with the FT-817, I changed the in-line resistor values from 10k to 40k as confirmed via alsa-show: ===== ALSA Controls for Radio Receive ===== ADC Level L:[0.00dB] R:[0.00dB] IN1 L:[Off] R:[Off] IN2 L:[40 kOhm] R:[40 kOhm No change. I have the FT-817 mode in PKT and PKT RATE set to 1200baud. I would be most grateful for any suggestions. John KM7LJ
On Sun, Dec 23, 2018 at 10:47 AM Basil Gunn <basil@...> wrote:
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