01-19-2021, 10:14 PM
Hi Rich,
I just looked at the schematic for the Zenith 908. It is an interesting transition model,6 tubes, with an RF amp stage from about 1935, where some of the tubes are the newer number letter number and some are the older number only types. As you can see from my pictures I do not re-stuff the old caps, I merely replace them with brand new of equal or better voltage rating. Having been repairing old radios for more than half a century now, I follow an old habit of making it obvious what parts are new when I do a repair. That way, any future tech who works on it in another 60 or 70 years can see what was done and when. Making the caps look like they were original just confuses matters. That may be fine for a museum piece, but for general restoration, the parts are under the chassis and will never be seen except by whoever works on it next, so there is no real point to all that extra work, and, as I said, there are good reasons against it. Good luck with your endeavors. I hope you will post some pictures of your work here.
Mike
I just looked at the schematic for the Zenith 908. It is an interesting transition model,6 tubes, with an RF amp stage from about 1935, where some of the tubes are the newer number letter number and some are the older number only types. As you can see from my pictures I do not re-stuff the old caps, I merely replace them with brand new of equal or better voltage rating. Having been repairing old radios for more than half a century now, I follow an old habit of making it obvious what parts are new when I do a repair. That way, any future tech who works on it in another 60 or 70 years can see what was done and when. Making the caps look like they were original just confuses matters. That may be fine for a museum piece, but for general restoration, the parts are under the chassis and will never be seen except by whoever works on it next, so there is no real point to all that extra work, and, as I said, there are good reasons against it. Good luck with your endeavors. I hope you will post some pictures of your work here.
Mike
