I did some sleuthing and John made the comment when we were discussing
Transmitted Phase noise in an Omni VII forum about 6 months ago. He said
that about a year and a half before they had made a change to the PA in both
the Omni and the Eagle (so that would have been around the end of 2013 or
the beginning of 2014) and said that was to make a cleaner transmitter based
on input from users like you and others.
=Vic=
WA4THR
To:
"'Discussion of Ten-Tec Equipment'" <tentec@contesting.com
<mailto:tentec%40contesting.com> >
Subject:
Re: [TenTec] OMNI VII ??
From:
"rick@dj0ip.de <mailto:rick%40dj0ip.de> " <Rick@DJ0IP.de
<mailto:Rick%40DJ0IP.de> >
Reply-to:
Discussion of Ten-Tec Equipment <tentec@contesting.com
<mailto:tentec%40contesting.com> >
Date:
Thu, 28 Jan 2016 12:59:26 +0100
List-post:
<tentec@contesting.com <mailto:%3Ca%20href=> ">mailto:tentec@contesting.com
<mailto:tentec%40contesting.com> >
Since nobody else commented on this, I will task my grey cells and comment
from memory. Several years ago, Ten-Tec re-designed its standard 100w final
PA circuit, switching from bipolar to FET transistors. This change was due
to unavailability of the bipolar transistors, not because of a need to clean
up the transceiver.
Having said that, it may be that the FET PA is now slightly cleaner than the
40+ year old bipolar design.
Maybe someone else has additional information.
When? That's a good question. I would guess it to be after 2010 because I
believe the first Eagles still had bipolar transistors.
73 - Rick, DJ0IP
(Nr. Frankfurt, Germany)
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