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I'm trying to make a simple transmitter beacon in VHF/UHF range. The goal is to make something small and battery powered for experimenting with antennas. I have an SDRPlay and want to make directional receive antennas and see if I can go and play hide and seek with the transmitters.
There are so many I can't figure out what would be suited for this application. Ideally I would want it to make a tone but a CW might work. For making the antenna a practical size I was thinking 455 900mhz. They dont put out much power so I'm not to worried about making interference, but I also dont want to put it in a crowded area of the spectrum.

I just discovered these at mouser.com but am not sure which ones to order. They are cheap enough where I was going to order 10 different chips. If some dont work its not a big deal at 1.50usd each.
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