Hi joshhawk,
Thanks for the samples. They are quite low level but with a bit of amplification I get the idea. Looking at them stacked on top of each other (see picture) and I wonder if it is maybe not Manchester encoded. It looks more like a MFM encode but that's normally used for magnetic media use.
Can you open the transmitter case without damage and maybe see what components are inside?
Edit:
Forgot to ask if you could supply more samples over larger ranges please.
