More Re: [TenTec] Orion redefines the meaning of ... AGC OFF

[Bill Tippett <btippett@alum.mit.edu>]

YT1NT wrote:
>Leaving preamp off of course ensures best possible
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):

Preamp  IMD             BDR
Off             84              119
On              91              119

Source:  http://www.arrl.org/members-only/prodrev/pdf/lab/orion_etrr.pdf
Main RX Swept BDR graph on p. 19 and Swept IMD graph on p. 20.

                                        73,  Bill  W4ZV