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Originally Posted by herr_oberst
Since you have an interest in old radios you've probably already seen Mr Carlson's Lab on the YouTube. He seems to know his stuff, but I doubt if you would be able to set up correspondence. Maybe, though?.
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He does Patreon for those that want to pay.
I know all of the more popular YTr's and then some. It's pretty much the same ol', same ol' after awhile. Some ah ha moments but there are 1000's of radios and brands.
Yes, RCA held the patents for years and the radio manf'rs paid ransom to build their version of the same thing. So many radios are extremely similar in construction. However a finicky problem can come up in the simplest set. They are highly tuned and once the signal is lost you might as well be looking for a diamond in the sand unless you really know electronics.
It might be easier to rebuild a 911 engine. I'll say this, if Wayne had taken a different path, his books would have made this a lot more easy. But he would have started with computers, not some old WWII era radio.
And I do have several books dealing with the era. There is a lot of theory on which I have somewhat of a grasp. But I can't sit down and draw out a schematic for a radio that would work. One has to just about be able to do that to go beyond the simple testing steps to isolate a problem area and then dissect that part.
I'm at the stage where if the compression is down on one cylinder, I should be suspecting valves and head gaskets and doing a leak down to listen. But any way you look at it you're still gonna have to pull the heads and then maybe the barrels because you can't see a cracked piston from the top.
And at that, there are no electrons involved. The problem, in essence, is invisible but can be seen or heard with instruments. Sounds easy enough. It's
not for everyone.