dynamic range, which may be significantly degraded by a preamp, particularly by a high gain one. That's what I would have thought too, but ARRL measured otherwise (1 kHz spacing, 14 MHz, 500 Hz BW):
Thanks Sinisa, This time it was me playing "Mr. Hyde". (Sorry for the false accusation) It sure sounded to me like a useless thing to do however several have pointed out that it is indeed useful. My
This cannot be accepted without an investigation, explanation, or similar. Although IMD measurements cannot be expected to be repeatable within a dB, this is simply too much to be accepted at a face
Exactly so. Orion's receiver is certainly not a noisy one. It's noise figure is very respectable, with both preamp on and off. 73, Sinisa YT1NT, VA3TTN _______________________________________________