I�m Deaf! I'm at Page 17 of the KFL1-4 manual... Receiver Alignment. Everything has been OK to this point. However, with AF gain wide open I hear no noise with or without an antenna. Looking at troubleshooting section 60 - Low or no audio from Rx... I'm referred to 65 - AF amp not working. Side tone is loud. Where (and what...) do I start checking? Thanks, Eric N7HWW