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[TenTec] Orion I main and RX366 subreceiver differences

To: "'tentec@contesting.com'" <tentec@contesting.com>
Subject: [TenTec] Orion I main and RX366 subreceiver differences
From: "Zivney, Terry" <00tlzivney@bsu.edu>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Tue, 27 Mar 2012 11:53:06 -0400
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
I had some major problems in the antenna systems this weekend (lightning) so 
spent some time comparing the main receiver in one of my Orions with the new 
RX366  subreceiver.  With the big signals on 15m SSB during the contest, I 
noticed some annoying 'sizzling' sounds on the main rx audio.  I had also 
noticed this in the V2 firmware.  The other Orion still has good old 1.372 
installed, much less noticeable on that rig.  When switching  back and forth 
between the V3 Orion main and subreceiver (by hitting the Main and Sub Audio 
controls) I noticed the subreceiver was totally clean while the main had that 
annoying sizzling.  Both receivers had identical bandwidths, etc, and I had 
just done a master reset before listening.

I would have thought that the two receivers would have had similar 
characteristics with the same firmware! Is there some substantial difference in 
the hardware for these two frontends?   I have promoted the subreceiver to be 
the normal receiver from this point on.

Terry Zivney, N4TZ
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