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Re: [TenTec] Another Possible O-II Issue

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] Another Possible O-II Issue
From: John Nason / NA9U <na9u@arrl.net>
Reply-to: na9u@arrl.net,Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Sat, 25 Feb 2006 04:52:33 -0800 (PST)
List-post: <mailto:tentec@contesting.com>
I'll check that out.  Along the same lines though I
notice my two recievers dont' sound about the same. 
My  main sound bassey and my sub sounds tinny.  Anyone

John NA9U

--- Grant Youngman <nq5t@comcast.net> wrote:

> I observed something pretty significant tonight
> while doing some comparisons
> between the Main and Sub receivers.  I hadn't used
> the Sub on anything but
> AM since the II arrived.  It's 2.030, resets done.
> Set up for a wide bandwith in LSB/USB (4-5Khz+),
> both radios seem to sound
> about the same.  As the bandwidth is narrowed on the
> Sub receiver, I think
> there is a PBT shift (not reflected in the settings)
> taking place as well.
> For example, with both Main and Sub tuned to the
> same LSB signal at about
> 1.8 Khz bandwidth, I have to set the Sub's PBT to
> somewhere around +500 to
> match the response of the two receivers.  I'm sure
> it's the Sub that's not
> working correctly because as you narrow the
> bandwidth you can hear the
> response get "tinny", as though PBT were sliding to
> cut the low end side of
> the signal.  The Main responds normally and just
> loses high frequencies as
> the bandwidth is narrowed.
> On USB, the situation is the same, except the Sub
> PBT has to be offset in
> the other direction by the same amount.
> Everything seems fine on the CW modes.  As far as I
> can discern audibly, the
> problem manifests only on SSB modes.
> I've checked and double checked, and all of the
> other parameters are set
> identically on the two radios.  
> Has anyone else observed this odd behavior?  Note to
> ditsbits in progress
> .... 
> Grant/NQ5T
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