Onkyo M-510 Power Amplifier with a fresh restoration: Ultra rare, ultra heavy, and ultra beautiful tubes The chassis is in excellent

The chassis is in excellent condition with no corrosion or serious defects

I've tried a few various antennas with no luck

I began replacing components

I'm located in NE Ohio

The receiver is in excellent cosmetic condition

Onkyo M-510 Power Amplifier with a fresh restoration: Ultra rare, ultra heavy, and ultra beautiful tubes The chassis is in excellentAs rare as it is heavy (insanely), the Onkyo M 510 is a power amp from the golden era of HiFi audio equipment. Onkyo spared no expense when they created their flagship amplifier. The physical build quality is second to none and the electrical design is complex, interesting, and robust. Did I mention its heavy? This massive beast weighs about 150lbs. Onkyo sold a limited number of these puppies in the United States and very few are left in circulation.