[R-390] R-390A Line Meter Calibration

[Larry H]

I tested the accuracy of my line meters a few years ago with my HP 400FL and determined that one was reading 1 db low.  Not a big deal, but I decided to 'adjust' it, so I wouldn't have to keep mentally compensating for it.  Before I did this last rash of measuring, I simply added a 25k compensating resistor across R110.  It was easy to do without removing the front panel.  The two attachment points shown in the pictures are pretty easy to get at.

https://s14.postimg.org/eadf362bl/IMG_7279s.jpg 
https://s13.postimg.org/i3oq2mo6f/IMG_7282s.jpg 

Regards, Larry