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Re: [TenTec] Request for check of Orion 1.3xx Behavior - AM

To: "'Discussion of Ten-Tec Equipment'" <tentec@contesting.com>
Subject: Re: [TenTec] Request for check of Orion 1.3xx Behavior - AM
From: "Grant Youngman" <nq5t@comcast.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Thu, 16 Feb 2006 18:33:12 -0600
List-post: <mailto:tentec@contesting.com>
> I change the TX bandwidth. The audio highs are lost, in the 
> Monitor audio, as the TX bandwidth is reduced from 3900 down to 900.

Thank you (all of you who responded) very much.

I'm not sure if this is no news or bad news.   My presumption on the
original is that the response could be opened up to about 3.9 KHz on each
sideband, for a little better fidelity when the band was clear (and yes,
closed down to 3 Khz or so when things got crowded, but at least at the ops
discretion).  I never did sweep the Orion on AM, so maybe that wasn't the

In the Orion II, the AM transmit bandwidth appears to be fixed at 6 Khz (per
the new manual update).  I'm presuming that means 3 Khz + Carrier + 3 Khz,
and if that's the case this new version of AM TX is certainly not an
improvement.  Guess I'm going to have to drag out the audio oscillator and
sweep the II, to really verify what's going on, before crabbing to ditnsbits
about ruining a good thing by (1) just messing it up or (2) making a
political statement in DSP code :-)

Thanks again ... Grant/NQ5T

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