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Re: Topband: One way prop

To: topband@contesting.com
Subject: Re: Topband: One way prop
From: Greg - ZL3IX <zl3ix@inet.net.nz>
Date: Mon, 18 Jan 2021 08:15:35 +1300
List-post: <mailto:topband@contesting.com>
So you've never given anyone 5/1 on SSB on a quiet band, Richard? That's possible on 10m on a good day. What you're describing seems to me to be the R value, not the S value. You may have noticed me giving reports of 469 or 479 on 160m when propagation is good but I have a high noise level.

'Knob twiddling' should not affect the S meter in a well designed rig. On my SDR, provided that a signal is strong enough to overcome noise levels on all settings, I can switch attenuators and preamps in and out and it makes not one jot of difference to the S meter reading. S9 is -73 dBm at the antenna connector no matter what.

73, Greg, ZL3IX

On 2021-01-18 08:06, Richard McLachlan wrote:
When I started in ham radio 60 years ago, S meters were just a tuning aid. I don’t 
think in all my experience that I have ever given a signal report based on an S meter 
reading, in fact I didn’t even realise that my current rig even had one. My reports 
are always based on a comparison between the background noise and the signal estimated by 
what is between my ears. Thus S3 is barely audible and anything above 6 or 7 is easy copy. 
The meter reading can be set to any value you like by knob twiddling. If somebody wants a 
comparison on different antennas for example then I would use the height of the spike on the 
panadaptor but I certainly would not rely on its calibration.

73

Richard G3OQT


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