Yes, that was precisely the point I was making. I tell the same
thing to people who complain that the Corsair (for example)
is "noisy". Sometime back in 1963 or so I learned to run the
AF gain higher and the RF gain lower and have never looked
back. That worked on my WW2 surplus receiver and it still
Bob McGraw - K4TAX wrote:
> Simple, by reducing the RF gain for a given band and signal condition you
> are improving the signal to noise ratio. Thus it results in less for the
> ears and brain to filter out. The result is less fatigue. Many folks
> believe that the RF gain must be run at MAX to hear weak signals. Quite the
> contrary. Above a certain point you simply increase the noise level along
> with the signal.
> Part of the issue you describe is related to the attack and release of the
> AGC system. They are very different between the two radios.
> Bob, K4TAX
> ----- Original Message -----
> From: "Steve Halliburton" <firstname.lastname@example.org>
> To: "Discussion of Ten-Tec Equipment" <email@example.com>
> Sent: Monday, April 06, 2009 7:11 AM
> Subject: Re: [TenTec] Omni VI / +
>> My OMNI VI/3 exhibits "fatiguing" audio only when the RF
>> gain is too high. Turn the RF gain up high and yes the audio
>> gets tiring in a hurry. Turn the RF gain down to a sensible
>> level (I don't think mine has ever been above half-way) and
>> the audio sounds great. This is only on CW that I'm talking
>> about since that's all I do with the radio.
>> The only way I can describe the difference in audio is that it
>> sounds "hard" in the O6 when the RF gain is up too high. It's
>> almost like every signal has a leading edge rise time that's too
>> short. My Corsair doesn't sound like that no matter where
>> the controls are set, it's always a little "soft". I put them
>> side-by-side last night to compare and the O6 sounds just
>> like the Corsair until I turn up the RF gain too high.
>> The passband tuning affects this also. If the PBT isn't set correctly,
>> the problem occurs more often. On my O6 the PBT has to be
>> set just a little to the left of center to sound best on CW. Filter
>> and sidetone frequency affect the position.
>> Steve WA2SOC
>> Andrew Moore wrote:
>>>> I suspect there was something wrong
>>>> with your Omni, but I don't know what it might have been.
>>> I don't think so -- I noticed it with both. I'm not sure how much DSP or
>>> noise reduction happens in the VI+, or the quietness of the receiver
>>> compared to what I'm used to, but something about it just didn't agree
>>> my ears, and I wanted very badly to make it agree. It wasn't bad by any
>>> means -- just subtle, but there. It was more like the "signature" of the
>>> radio's audio than something specific.
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