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[TenTec] New 7800 reveiw

To: "Ten Tec List" <tentec@contesting.com>
Subject: [TenTec] New 7800 reveiw
From: "Ron Castro" <ronc@sonic.net>
Reply-to: Ron Castro <ronc@sonic.net>,Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Thu, 22 Feb 2007 11:34:43 -0800
List-post: <mailto:tentec@contesting.com>
I just glanced over the new ARRL review of the IC-7800 to compare it to the 
Orion II.  Although they have improved on the 5 kHz blocking numbers, the 
'up-conversion' scheme results in very little improvement in the 2 kHz numbers. 
 Comparing the reviews:

2 kHz Blocking Dynamic Range:
        IC-7800=114/117 dB        Orion II=139/136

2 kHz 3rd Order Dynamic Range:
        IC-7800=86 dB            Orion II=94 dB

The Orion II still has a 22 dB advantage in close-in blocking, and if we can 
project some of Rob Sherwood's test data, the Orion II numbers are about the 
same at 1 kHz, while we can assume that the IC-7800 continues to deteriorate.  

I have noticed that DX pile-ups are often QSX "up 1" instead of "up 2" or even 
"up 5", and in contesting, I often hear stations 'running' .3 to .5 kHz away 
from each other.  If the station you want to work is S-1 and the next up is 
+40, the difference can be noticeable.

Not to take away that the IC-7800 numbers are still excellent and the radio has 
a number of top features including its beautiful display, but I doubt it 
performs better in a CW contest or pile-up than an Orion II or an Orion 
'Classic'.
    
      Ron N6IE
 www.N6IE.com
(Formerly N6AHA)
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