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Re: [TenTec] Rob Sherwood Comments on IC-7800 & Orion II

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] Rob Sherwood Comments on IC-7800 & Orion II
From: Tommy <aldermant@alltel.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Sun, 04 Jun 2006 04:07:40 -0400
List-post: <mailto:tentec@contesting.com>
Interesting comparison of radios!

I have an IC-781 and two Omni 6 Plus/with 600 hz roofing filter, all 
three of which drive my Titan 3 quite well in CW, full QSK. All three 
work excellent for my operating style of CW only, rag chewing, 
DX'ing, and QRQ operation, the IC-781 having much sharper IF 
selectivity filters than the Omni ( which also has Inrad IF 
selectivity filters). The Omni's DSP noise reduction gives the Omni 
an advantage in weak signal copy, over the IC-781. Weak signal 
performance difference between the three radios (on the air) are 
almost identical with the exception that the Omni's AGC certainly 
handles QRN significantly better than the IC-781. All three are 
excellent performers in CW contesting environments with very strong 
signal conditions. The IC-781 handles strong adjacent signals quite 
well, in spite of it's rather poor performance rating by Sherwood. 
The Omni 6 Plus, with the roofing filters, is just infallible. A 40dB 
over signal sitting  0.5 kc away from a weak signal, can not even be 
noticed, unless the strong signal has key clicks or phase noise.

The IC-781 is only matched by a Corsair 2 or a Triton for QRQ CW (>60 
wpm) using full QSK. However the Omni 6 Plus (with Logic chip 1.02) 
is no slouch as it will run full QSK as high as 73 wpm.

However my day-to-day preference for normal QSOing and DXing, is the 
Omni 6 Plus. It is an 'operators' radio with a front panel layout 
that is the most convenient and intuitive of any radio I've used in 
my short 54 years of hamming. In the 20 months I owned an Orion, I 
personally could never get completely comfortable with the 'busy' 
front panel, especially during contesting. And of course back then, 
the Orion would not work reliably with the Titan 3 amp using the 
Keying Loop and in full QSK, with random RF output power loss and 
random rcvr audio loss. With the exception of v1.73 firmware, the 
Orion was worthless at trying to run QRQ over about 50 wpm. (Not a 
'big deal' to most operators).

Inrad published IMD3 test information on the Omni 6 Plus with Inrad's 
600 hz roofing filter, showing it to be one db better than the Orion, 
however one must be aware of 'marketing hype' with such test results. 
The ARRL test results would have to be considered about as 
good/accurate as one could get, simply because of the test 
environment in which the have their lab set up, plus the knowledge of 
their technical staff. (You sometimes have to just ignore the 
verbiage of some of the written reviews in QST, and just analyze the 
numbers!) This being said, it is my opinion that radios rated in the 
'top 15' for receiver specification performance is one thing, it is 
the actual operator, using the radio in his/her environment, that 
determines which is the 'best' radio for the way that individual opreates.

Tom - W4BQF

At Saturday 10:57 PM 6/3/2006, you wrote:
>Here is an interesting post on the IC-7800 Yahoo Group by Rob Sherwood,
>NC0B.  He gives his initial comments on his review of the IC-7800 as well as
>a comment that Ten Tec is working on new AGC firmware for the Orion.
>You don't have to be a group member to view the archive.
>Alan  N5NA
>TenTec mailing list

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