Finally a directional antenna for RDFing that fits in the car.
"A Uniquely Tuned 2-Meter Transmitter Hunting Loop" - by W6NBC, QST Jan 2013
The attenuator is from May 1998 QST. "A Rugged Compact Attenuator" by N9SFX.
playback.py: As of this writing, a large multi-national ham radio group has deployed this on TGID 9998 and dubbed it the "parrot". This application can listen to group and/or private voice transmissions and if you trasmit to the group and/or private IDs it's programmed to use, it will record the digital packet stream and then re-play it back. Handy for listening to your audio to see what you actually sound like on the air