A quick search of the forum didn't show that this one has already been mentioned (or my search foo has taken a New Years break) but there are quite a few Sam's Photofacts books on the American Radio History site
https://www.americanradiohistory.com...shelf_Sams.htm
There's a power supply book that has an interesting valve based variable supply in it and also this one
https://www.americanradiohistory.com...-DC-6-1958.pdf on dial stringing arrangements. It is for US manufactured sets and includes Hallicrafters and Collins sets which should be useful (I don't believe this clashes with any of Paul's data sets, but MOD's please delete if it does).