[R-390] R-390a sensitivity measurement observation

[Anthony Casorso]

I have not measured the sens of my receiver since 2007 so I thought I would check it out today. While I was making the measurement I noticed something that I thought was interesting. I am measuring AM sensitivity with 30% modulation. I started with the signal vs no-signal method and got .31uv at 9.5Mhz. Then I measured using the modulation vs no modulation method and got .9uv. So far so good. For some reason I turned on the limiter at it's minimum setting. The signal-no signal sens improved to .23uv while the modulation-no modulation sens stayed at .9uv. Depending on which method you subscribe to, here is a cheap way to improve you sensitivity :) .
By the way the radio actually measures a touch better than it did in 2007 except at the top band where it is slightly worse. I don't have it on much though.
I'd be interested in any comments about measuring sensitivity with the limiter on.
Tony