"So much for "astonishing, unparalleled, ultimate" and other
unabashed Icom marketing hype about the 7800."
This information may have previously been presented here by others, but
W8JI's testing of the IC-7800 and other receivers is presented in the links
below. What's frightening, if true, is that the IC-7800's close-in (2 kHz)
IMDR performance is worse than the IC-751A, a seventeen year old design.
http://www.w8ji.com/receiver%20IM3%20sorted.htm
http://www.w8ji.com/receiver_tests.htm
----- Original Message -----
From: "Bill Tippett" <btippett@alum.mit.edu>
To: <tentec@contesting.com>
Sent: Sunday, July 18, 2004 9:48 AM
Subject: [TenTec] IC-7800 Expanded Test Report
> Now available for ARRL members only at:
>
> http://www2.arrl.org/members-only/prodrev/pdf/lab/ic7800.pdf
>
> KC1SX added some new 1 kHz data to the QST Product Review:
>
> BDR: 95 dB (graph on page 19)
> IMD: 66 dB (graph on page 20)
> Phase noise: -93 dBc/Hz (graph on page 21)
>
> By way of comparison, here are Orion's 1 kHz numbers:
>
> BDR: 118 dB (graph on page 19)
> IMD: 85 dB (graph on page 20)
> Phase noise: -138 dBc/Hz (graph on page 22)
>
> http://www2.arrl.org/members-only/prodrev/pdf/lab/orion_etrr.pdf
>
> And remember that the Inrad #352 kit (#762 assembled) improves
> IMD by "about 10 dB" (according to Sherwood) at 1 kHz over the
> 1000 Hz filter data listed above.
>
> So much for "astonishing, unparalleled, ultimate" and other
> unabashed Icom marketing hype about the 7800.
>
> 73, Bill W4ZV
>
----------------------------------------------------------------------------
----
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|