DB1IAT's blog

Teensy 3.2
GPS Receiver
SI5351
10 MHz Lowpass-Filter
20 mW -> G5RV

Teensy 3.2
GPS Receiver
SI5351
10 MHz Lowpass-Filter
5 mW -> G5RV

First Time TX on 30m
Just give it a try.
We got some Spots with just a 10 Meter long Wire.