11-10-2021, 06:04 PM
Back in October I bought this National NC-60-Special. It is a glorified All American 5 circuit, and a successor to the National SW-54. It was made to compete with the Hallicrafters S-38E. If you look at the circuit you will see the striking similarity, right down to the "gimmick" used to provide feedback in the IF stage. Here is the schematic, I pieced the two halves together since they are on two different pages in the manual...
[Image: https://64.media.tumblr.com/384cc27bf411...603517.jpg]
Here is what the radio looked like before I began any work...
[Image: https://64.media.tumblr.com/12e973c8648f...9f0377.jpg]
[Image: https://64.media.tumblr.com/1958ba3c8fc1...62fbee.jpg]
I have ordered a number of condensers for the radio, and will have to wait for them to arrive. Other than that I have begun work by removing the chassis, doing some cleaning of the topside, removing the tubes for testing, and replacing the speaker which was pretty bad. I happened to have one of the right size and resistance in stock, which made it easy...
[Image: https://64.media.tumblr.com/cbfc38801e42...018022.jpg]
[Image: https://64.media.tumblr.com/384cc27bf411...603517.jpg]
Here is what the radio looked like before I began any work...
[Image: https://64.media.tumblr.com/12e973c8648f...9f0377.jpg]
[Image: https://64.media.tumblr.com/1958ba3c8fc1...62fbee.jpg]
I have ordered a number of condensers for the radio, and will have to wait for them to arrive. Other than that I have begun work by removing the chassis, doing some cleaning of the topside, removing the tubes for testing, and replacing the speaker which was pretty bad. I happened to have one of the right size and resistance in stock, which made it easy...
[Image: https://64.media.tumblr.com/cbfc38801e42...018022.jpg]
