Quoting kc9cdt@aol.com:
> So...I wander when the standard changed??
> In my Collins 75S-3 and KWM-2 book...it says 100uv = S-9??
> 73,
> Lee
>
>
>
> -----Original Message-----
> From: k3miy <k3miy@csonline.net>
> To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
> Sent: Tue, Apr 24, 2012 10:28 am
> Subject: Re: [TenTec] 566 Orion II Firmware Version V3.029
> ---SpectrumDisplay &Tuning...
>
>
> Hi Kim
>
> The S meter WOULD move! It would go to S-7, assuming correct
> calibration. Fifty microvolts=S-9 is the calibration standard.
>
> Ron
> K3MIY
>
>
>
>
> Quoting Kim Elmore <cw_de_n5op@sbcglobal.net>:
>
> > Wait a minute... By way of example, do you mean to say that if I
> > injected a 50 uV signal into the antenna terminals of the OII I'd see
> > an S9 indication and that if I then selected 12 dB of attenuation via
> > the front panel, the S-meter wouldn't move?
> >
> > Kim N5OP
> >
> > At 09:02 AM 4/24/2012, you wrote:
> > >Yes the ATTN and Pre functions do change the S METER READING.
> However
> > >even then with those changes S-9 still equals 50 uV. There is a
> > >difference in S meter reading and S meter calibration.
> > >
> > >73
> > >Bob, K4TAX
> > >
> > >
> > >
> > > > On my Orion II...the ATTn and pre-amp changes the s meter reading
> a
> > > > lot??
> > > > What do you mean on TT radios the same is true of the ATTN and
> Pre-amp
> > > > as to the s-9 = 50uv?
> > > > Thanks,
> > > > 73,
> > > > Lee
> > > >
> > > >
> > > >
> > > > -----Original Message-----
> > > > From: Bob McGraw - K4TAX <RMcGraw@Blomand.net>
> > > > To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
> > > > Sent: Mon, Apr 23, 2012 11:48 pm
> > > > Subject: Re: [TenTec] 566 Orion II Firmware Version V3.029
> > > > ---SpectrumDisplay &Tuning...
> > > >
> > > >
> > > > I usually find a spot on the band where there is no signal, no
> QRM or
> > > > splatter and with the antenna of choice. Turn the RF Gain up to
> the
> > > > point
> > > > you see the noise flicker on the S meter. Note that level say
> S-6. I
> > > > normally use th SLW AGC as it makes the S meter a bit easier to
> read
> > > > peaks.
> > > > Then I usually switch the radio to my dummy load and then adjust
> the RF
> > > > Gain
> > > > such that the S meter indicates about 1 S unit lower than the
> previous
> > > > noted
> > > > level or about S-5. Then back to the antenna. To me that
> optomizes
> > > > the
> > > > gain for the antenna and noise.
> > > >
> > > > With a bit of practice one can set the RF Gain just looking at
> the S
> > > > meter
> > > > values and backing the RF Gain down as one gets a "feel" for what
> is
> > > > taking
> > > > place. All the other steps are "just to make it easy" and
> repetitive.
> > > >
> > > > Just remember, with Tentec radios the S meter always references
> S-9 as
> > > > being
> > > > equal to ~50uV regardless of RF Gain values. Same is true with
> the
> > > > ATTN
> > > > function engaged at some value or the Preamp engaged.
> > > >
> > > > 73
> > > > Bob, K4TAX
> > > >
> > > >
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: "Kim Elmore" <cw_de_n5op@sbcglobal.net>
> > > > To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
> > > > Sent: Monday, April 23, 2012 10:24 PM
> > > > Subject: Re: [TenTec] 566 Orion II Firmware Version
> > > > V3.029 ---SpectrumDisplay &Tuning...
> > > >
> > > >
> > > >>I tried this with my OII, think that I must have missed
> something. I
> > > >> simply never see the S-meter drop and then rise as I decrease RF
> > > >> gain. Of course, it will drop if I turn off the preamp, but not
> as I
> > > >> change the RF gain setting using the multi knob. What I see is
> that
> > > >> the minimum S-meter reading rises as RF gain is reduced (as if
> the
> > > >> AGC voltage is being increased which is, in some sense, what's
> > > >> happening). At some point the minimum S-meter reading is above
> the
> > > >> maximum deflection due to static crashes. Then, any signals
> stronger
> > > >> than the static crashes will lead to an upward deflection. Am I
> > > >> missing something subtle? Does anyone else see the S-meter drop
> then
> > > >> rise as the RF gain is decreased?
> > > >>
> > > >> I set my SAF by ear as per the TT instructions, decreasing RF
> gain
> > > >> until I hear only a little ringing. Even though I am almost
> > > >> exclusively CW, I tried it a couple of times on SSB was
> surprised how
> > > >> much it helped on weak signals.
> > > >>
> > > >> 73,
> > > >>
> > > >> Kim N5OP
> > > >>
> > > >> At 02:38 PM 4/23/2012, you wrote:
> > > >>>A visual clue for setting RF Gain is the S-meter. While
> listening to
> > > >>>just noise, as you decrease the RF-Gain, the S-meter noise level
> > > > drops,
> > > >>>and continues to drop, until you reach a point where the S-meter
> > > >>>reverses and starts to climb - while the RF-Gain continues to be
> > > > turned
> > > >>>down. Thus, there is a point where the S-meter changes
> direction
> > > > while
> > > >>>the RF-Gain is still being turned down. (Sorry... I find this
> > > >>>difficult to say in words...) The point where the S-meter
> reverses
> > > > is
> > > >>>the sweet spot (although I find it is really just above that
> > > > point...)
> > > >>>
> > > >>>Play with it and you will SEE what I mean. I think you will
> find the
> > > >>>S-meter reverses just at or just below the point where you can
> HEAR it
> > > >>>change over.
> > > >>>
> > > >>>I have an Omni VII and this works on it -- I spent time on my
> > > > friend's
> > > >>>Orion II and it seemed to work exactly the same way, albeit at
> > > > different
> > > >>>points on the dial. ...snip...
> > > >>
> > > >> _______________________________________________
> > > >> TenTec mailing list
> > > >> TenTec@contesting.com
> > > >> http://lists.contesting.com/mailman/listinfo/tentec
> > > >>
> > > >
> > > >
> > > > _______________________________________________
> > > > TenTec mailing list
> > > > TenTec@contesting.com
> > > > http://lists.contesting.com/mailman/listinfo/tentec
> > > >
> > > > _______________________________________________
> > > > TenTec mailing list
> > > > TenTec@contesting.com
> > > > http://lists.contesting.com/mailman/listinfo/tentec
> > > >
> > >
> > >
> > >_______________________________________________
> > >TenTec mailing list
> > >TenTec@contesting.com
> > >http://lists.contesting.com/mailman/listinfo/tentec
> >
> > _______________________________________________
> > TenTec mailing list
> > TenTec@contesting.com
> > http://lists.contesting.com/mailman/listinfo/tentec
> >
> >
>
> Hi Lee.
Wonder if different mfgs have different standards? All of the manuals
I read on calibration of RX gave 50uv as S-9 correct calibration.
Ron
K3MIY
>
>
> -------------------------------------------------------------------
> This mail sent through CSOnline Webmail http://webmail.csonline.net
>
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
>
-------------------------------------------------------------------
This mail sent through CSOnline Webmail http://webmail.csonline.net
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|