Gift: ERLA Model S-11 #16149

[Fran604g]

Originally Posted by Electronic M

Most schematics asside from some 1920s ones have absolutely no correspondence between position of part on the page and mechanical location of part on the chassis.... honestly if you understand circuit theory it is best that the schematic not include mechanical layout to make the power and signal flow easier to read and follow.

The best thing to do is to if you are having trouble matching things on the schematic to the chassis is label each part with the letter-number designator on the schematic (some 20s schematics may need you to add your own designators). Some parts are easy to identify, and if you trace unknown parts to known then look at everything hooked to the known on the schematic you can trace it out.


TV collectors like me have to do this activity accurately on 20-40 tube TV sets regularly.

Yep. That's exactly how I do it, too. It's funny to me that the schems I've examined with similar topographies, centered the circuitry around the Detector.

My goal with this specific schematic, is to check and amend it as compared to my specific radio. The schematic I posted is of unknown origination, and there may very well have been changes by the manufacturer - as this was a very common occurrence in this time period. Technology and markets changed constantly, and manufacturers had to try and quickly respond to public demands, right?