Hi Curt,
Initially I had TDA2822. That time also I had same experience. Now I have changed it to LM368 by making an adapter board. I have not added the capacitor. But will check CR's capacitor suggestion fixes this.
I dont have any other transceiver to verify my antenna nor can check and confirm if AM broadcast is happening now. Let me check tomorrow morning and see if AM is being heard.
73
VU3ONX