More Re: [TenTec] Orion redefines the meaning of ... AGC OFF
Bill Tippett
btippett at alum.mit.edu
Sun Feb 8 19:32:37 EST 2004
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
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