[GreenKeys] Getting stuff on the air

Harold Hallikainen harold at w6iwi.org
Thu Nov 12 21:22:15 EST 2020


I made some progress today getting the model 15 and TU-170 on the air. I
tried the FSK decoder on a couple Kiwi SDRs, but that did not work. But,
if I held my phone to the speaker and ran Droid RTTY, it was decoded
properly. Has anyone used the FSK decoder on Kiwi SDR?

Looking at the waterfall on websdr, I see quite a bit of bandwidth
increase (splatter) when keying with the model 15 keyboard. I don't know
if this is common. I see no low pass filter in the AFSK keying circuit.

While messing around with it, I broke one of the leads on an audio
transformer I added, so I'm off the air for a few days while waiting for
some more to arrive.

Harold



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