problem with sending data using RF module

[JD123]

Check your comp drawing. If it's correct, you're sending the comp to rails. I think you ment to take the output of the rec to the inverting input, not ground. The 100uf cap is a bit much. I'd use a 1uf or even a .1uf.

Also, what's the signal look like at 1.8khz (same speed as the tx). Your receiving scope pix says you'r reading at 19.3mhz. If your data is riding on the noise at 1.8khz, you'll need to filter the noise in a LF band pass amp.