[TenTec] audio on Omni-VI+

[yash at aol.com]

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 at weather.net>
To: tentec at 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 at 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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