[R-390] Some practicalities on alignment of the R-390A/URR

[roy.morgan at nist.gov]

Quoting WD4INP <WD9INP at isp.com>:
..when you align R-F subassemblies that are energized
> with plate voltage, be careful. Use an insulated screwdriver 

I suggest we make up little stickers in red with "<-- B+ !!" on them.  Putting
one next to each dangerous adjustment would help us or others in the future.

Roy
K1LKY

Roy Morgan
13033 Downey Mill Road
Lovettsville VA 20180