Gerald
your right on the limits of communications audio ,but the VI+ does not even
pass audio in that range, in normal operation. I run a B-line, a flex 5000 and
a Kenwood ts-480 ,all produce beautiful,clear audio. Iam not talking ssb HI-FI
or any of that nonsense. My old s-line had much better audio than the ten tec
has in its normal unchanged state. The VI+ always sounds like it has a BAD head
cold. I have been able to upgrade the audio quality with the Inrad mod, better
but not good. Will give N1EU's direct takeoff suggestion for the audio a try.
The quality of the VI+ audio was mostly a result of tweaking for CW and never
listening to ssb on the rig. No other manufacturer seems to have a audio
problem like the VI+'s. It was also in the Omni V's and a few other earlier
rigs. Just my opinion
thanks
dale wt4t
-----Original Message-----
From: Dr. Gerald N. Johnson <geraldj@weather.net>
To: tentec@contesting.com
Sent: Sun, Feb 6, 2011 11:29 am
Subject: Re: [TenTec] audio on Omni-VI+
Communications audio isn't full and robust. It has a limited bandwidth
by the IF filters and proper audio to limit you hearing atmospheric and
circuit noise, hum, and rumble. Adding bandwidth to any of these reduces
the S/N of the desired signal and allows you to filter more atmospheric
and circuit noise and QRM with your ears.
I often use a passive low pass filter on the speaker to reduce filter
leakthrough and audio state high frequency noise outside the IF filter
pass band. One I use is described at:
http://www.geraldj.networkiowa.com/papers/speakerfilter.pdf
Its really handy for cleaning out DSP artifacts.
73, Jerry, K0CQ
On 2/6/2011 8:31 AM, yash@aol.com wrote:
>
> Have been using my ,new to me ,Omni VI+ for a few weeks,like the rig,hard
> to
fault for a 10+ year old rig. I have one problem that I would like to change.
The audio quality. In stock form the rig sounds "nasally" to me ,constricted
and
choppy. I installed the Inrad audio kit ,2 caps and 1 resister,it made a nice
change in the quality of the audio. I noticed that INrad also mentions changing
the OEM 6 MHz filter with a #755 of their design. Has anyone done this filter
change? Is there another route to getting the audio sounding full and clean
with
this rig? Other than the audio the VI+ is great.
> thanks
> dale wt4t
>
>
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