Welcome Cornfarmer! I've fixed several of these. The trouble spots for drop-outs: #1 by far is the output relays. You know it's them if you crank it up and it starts playing fine. Change them no matter what. Next is the TAPE MONITOR switch. You can DeoxIt from underneath. There is a ribbon cable that operates the switch, which is located on the Input Board, remove the bottom cover for easy access. Lastly, Volume and Balance potentiometers, if DeoxIt doesn't fix them, you might need to replace them, they do go bad. As for your tuner issue, there is a variable capacitor on the Tuner "sandwich"