Thanks for this reference, Paul, which I unfortunately received and read
after posting my previous response to you.
Despite Mr. Inoue's statement of over two years ago that no new Icom
products would use analog crystal or mechanical filters, it does appear that
the 7800 reduces the roofing filter bandwidth to 6 kHz for all but FM
operation.
Mea culpa for passing along incorrect information, if indeed the 6 kHz
filter is crystal or mechanical. The PROs use ceramic filters for roofing
due to their lower insertion loss and lower distortion. Perhaps, the 7800
does also.
Interesting report - thanks again for pointing it out.
73/72, George
Amateur Radio W5YR - the Yellow Rose of Texas
Fairview, TX 30 mi NE of Dallas in Collin county EM13QE
"In the 57th year and it just keeps getting better!"
<mailto:w5yr@att.net>
----- Original Message -----
From: "Paul Christensen, Esq." <w9ac@arrl.net>
To: "Ten-Tec Reflector" <Tentec@contesting.com>;
<TenTec_Orion@yahoogroups.com>
Sent: Saturday, May 17, 2003 6:54 PM
Subject: [TenTec_Orion] Re: IC-7800 Product Literature
> Also, look on page 5 of the IC-7800 product detail. It appears the
IC-7800
> uses a 6 kHz roofing filter in the first I.F for SSB/CW.....it is not
> limited to a 15K filter like the 756PRO/Pro-II.
>
> The Specifications, rear panel photo and block diagram appear on page 4.
> Here's the link again for those who missed my last post:
>
> http://qtc-japan.net/2001/03_news&topics/ic-7800new.pdf
>
> -Paul, W9AC
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