[600MRG] S meters and noise...

[Gedas]

Dave does your receiver indicate in absolute or relative readings? You 
said -132 for your NF but you did not include any units like dBm.

Gedas, W8BYA EN70JT

Gallery at http://w8bya.com
Light travels faster than sound....
This is why some people appear bright until you hear them speak.

On 1/18/2021 8:29 AM, Dave Riley via 600MRG wrote:
>
> It has been decades of battle trying to hear signals out of this local 
> noise, mostly from 33KV 3/phase lines going by, especially on 630m..
>
> To establish a base line and find my starting point I converted some 
> numbers essential to this quest..
>
> _dBm      uV    S meter_
>
> -73        50        S9
> -79        25        S8
> -85        12.5     S7
> -91         6.3      S6
> -97         3.2      S5
> -103       1.6      S4
> -109         .8      S3
> -115         .4      S2
> -121         .2      S1
> -127         .1      S0
>
> The SDRdx receiver indicates approx. -132 for a noise floor and no 
> problem as my continuous noise on 630m now is S5 +/-..
> I think that WSPR sigs are good for digging in to the noise @ about 
> 20db below noise floor.. ( maybe )
> There are plenty of other noises around the house for sure but @ 630m 
> this is no big problem..
>
> This is where I am at present as to receiving more sigs on 630..
> The receive antenna is a 400' tuned vertical loop that hears 
> everything including the S5 noise..
> To date the best noise antenna input to a home brew Dallas Lankford 
> phaser is a 300' RG6 tuned loop on the ground directly beneath the 
> vertical loop..
>
> This quest has been an exhausting effort but at least I'm hearing 
> great DX for what seems like the very first time..
>
> Conversely I test wspr on 30m which at times can be -130 noise or 
> so...  It's nice to wake up in the morning and see all WAC-7 
> continents with good S/N..
>
> Recently I found a very quiet 630m receive location but it would 
> require a wifi hop back to the house.. Next project?? Has anyone done 
> this??
>
> Thanks for your opinions..  DaveR aa1a
>
>
>
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