[ARC5] R-23/ARC-5

[kg4kgl at gmail.com]

Good afternoon,

I recently bought a somewhat hacked on R-23. My goal is to get it working as a Q5’er with a 12SA7 pentagrid converter frontend for 80 and 40m. I also want to keep it looking as original as possible. 

I have schematic diagram in front if me and there is a part that installed that is not on the diagram. It looks like a ceramic wire wound resistor (grey in color) with USN markings. It is connected between pin7 of the 12k8 and the 12sk7 pin7 next to it. Is this a factory part?


Another question. The inside of the top access cover has a small dial on it and an adapter for the front tuning mechanism. What is the dial for?
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