I've sorted out the problems I was having with the pitch reference oscillator so it is producing the frequency it is supposed to. I've also built the pitch variable oscillator and have it producing close to the frequency I want but I don't seem to be getting any change in the frequency when I put my hand next to the antenna. I thought the change might be too small to be noticeable on my scope so I built the mixer circuit to combine the two signals to see what I got out of that.
I seem to be getting an amplitude modulated signal on a rather poorly filtered carrier frequency but I don't know if that's what I'm supposed to get or not. Unfortunately my instructions don't give any indication of what waveforms I should see coming out of each of the modules. I also don't seem to be getting much frequency shift out of the mixer either unless I actually grab the antenna. I don't have any specs on the antenna so I just bought a replacement car antenna to try so I don't know if that's part of the problem or not.
I seem to be getting an amplitude modulated signal on a rather poorly filtered carrier frequency but I don't know if that's what I'm supposed to get or not. Unfortunately my instructions don't give any indication of what waveforms I should see coming out of each of the modules. I also don't seem to be getting much frequency shift out of the mixer either unless I actually grab the antenna. I don't have any specs on the antenna so I just bought a replacement car antenna to try so I don't know if that's part of the problem or not.