To my knowledge the standard accepted S meter calibration is 50 uV for S-9.
Historically, S meters have been all over the place with regard to readings.
I have recently checked my Omni VI+ and my Paragon II using my HP generator
and both are quite consistent with regard to the 50 uV for S-9 on the ham
bands.
73
Bob, K4TAX
----- Original Message -----
From: "Rick Williams" <rick.williams@telus.net>
To: "TenTec E-mail" <TenTec@contesting.com>
Sent: Sunday, April 11, 2004 7:24 PM
Subject: [TenTec] Omni V S-meter?
> Today I was playing with the Omni V, RX-320 and Argo V and noticed that
the
> RX-320 and Argo S-meters agreed on virtually all bands. The Omni was
> similar on 80 and 40 metres but it read significantly lower on frequencies
> above 7 MHz. All rigs were using the same antennas and similar filter
> settings.
>
> Now the difference was not critical when listening to weak stations as all
> S-meters had similar signal to noise floor readings. That is an S-6 on
the
> Argo was 1 S-unit above the S-5 noise and with the same signal the Omni
was
> S-2 above the S-1 noise floor. But why the big difference in noise floor
> readings at higher frequencies?
>
> I noted that the ARRL 1990 test showed the Omni V they tested had an S-9
> reading at 14 MHz of 168 uV while the Argo they tested in 2003 required
only
> 39 uV for an S-9 reading on 20 metres? (In a similar 1999 test the RX-320
> needed a staggering 484 uV.) But the S-meter adjustment is generic for
all
> bands and adjusting the pots on the IF/AF board would not likely solve my
> problem.
>
> Have others noted this anomaly? Any ideas as to what's happening?
>
> Thanks.
> 73,
>
> Rick
> VE7TK / VE7ASR
>
> Website: http://www3.telus.net/ve7tk
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>
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