Here's an institutional grade Newcomb AM-500 5-tube AM radio that contains a power transformer and 6V6 output stage. I don't know how old this is; but, I'm seeing clues that indicate that it may be from the '70's. It uses the later style red/blue "N" logo, it has a 3-wire AC cord, the tubes have the newer block style "RCA" logo, and the electrical rating on the back cover is in "Hz", instead of cycles. The only thing that suggest it may be older is the presence of CD markings on the dial; which, were mostly gone by the mid '60's. I guess since this was a commercial radio, they decided to retain these markings. The radio plays; but, will need the usual control cleaning. As new as it is, it probably does not use any paper capacitors; so, I should be OK there. Of course, I'll know more once I pull the chassis. For those who don't know, Newcomb made record players and PA amplifiers for the institutional market and I think they were one of the last companies to use tubes. By the early '80's, they had gone out of business.
