I'm having similar "hearing problems". I elected to purchase SIEMENS CENTRA
hearing aids and have two of the four "memories" programmed with Heil HC-4
and HC-5 audio response curves.... see this week's QRZ DX, Issue 2006-48E
(page 3)for details.
73 & DX,
Gary, AB9M
----- Original Message -----
From: <wa3fiy@radioadv.com>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Tuesday, December 05, 2006 1:02 PM
Subject: Re: [TenTec] Noise Reduction Setting
> On 5 Dec 2006 at 11:32, Grant Youngman wrote:
> >
> > What I'd really like to understand is why THRESHOLD was put there as a
> > separate control to begin with. It was likely not just some frivolous
> > exercise or a burning need to confuse the operator. And now that it is
> > linked to RF Gain, other than making life easy(?), what are the pluses
> > and
> > minuses of having THRESHOLD separate from or linked to RF Gain?
> >
> Can't say why THRESHOLD was put there as a separate control but I like it
> that way. Although I do use the RF Gain often, I also use the AGC
> THRESHOLD.
>
> Here's my background. I have a fairly serious hearing problem which
> among other things makes ham radio operations tough. I like to have a
> very good signal to noise ratio as much as possible. Since I don't hear
> well, I'm not a contester or DX'er. I mostly work full break-in CW and
> like to
> have the RX quiet between elements. On SSB I also need the radio to be
> pretty quiet when no one is talking. On the other hand, as band
> conditions
> deteriorate I do like to be able to finish the QSO or net.
> So..........here is
> the way I have my AGC setup.
>
> SLOW :
> Hang - 1 sec
> Decay - 10dB/s
> Threshold - 11uV (about S6 on the S meter)
>
> MEDIUM:
> Hang - 0.5sec
> Decay - 20dB/s
> Threshold - 5 uV (about S5 on the S meter)
>
> FAST:
> Hang - 0.2 sec
> Decay - 80dB/s
> Threshold - 1.4uV (about S 2.5 on the S meter)
>
> PROG:
> Hang - 0.1 sec
> Decay - 200dB/sec
> Threshold - 1.0 uV (about S2 on the S meter)
>
> I set the AGC slope to 2:10 dB.
>
> I use slow AGC when conditions are pretty good and work down (Med,
> Fast, Prog) as conditions get worse. Having THRESHOLD available in the
> AGC settings makes it very convenient for me to quickly set the best
> performance for any conditions. I can still use RF Gain to reduce RX gain
> further if desired.
>
> For my operating, this is one of the great features of the Orion. Put all
> together, this makes a very nice sounding radio.
>
> There are probably nearly as many different AGC profiles as there are
> Orions. And, as long as they work for the user, they are "right".
>
> 73,
>
> -Lee-
> WA3FIY
>
>
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