Last week I found this old Zenith AM/shortwave T.R.F. receiver while looking at some other old stuff. Must have weighed about 50 pounds! It appears to go back to the early thirties.
Yeah, the speaker has seen better days. This unit has a separate power supply with huge transfomers.
What seemed interesting to me is that there wasn't a glass dial on this particular model. Just a big dial gear with numbers. At least there aren't any strings to break. It's got a huge tuning capacitor.
I was able to find the schematic on a CD that has the first "Riders" book on it. Unfortunately, I don't have all the tubes for it, but it uses two 45s, three 24-As, and 3 other tubes I can't remember the number of. It's got a phono input, too.
I've never worked on anything quite this old. Are these sets anything to write home about? I figure it oughta make an interesting project if I can find something to stick it in!