[600MRG] Relative outside noise...

[Ed Cole]

Dave,

I have been inactive for a few years but I recall trying a single wire 
BOG of 1/4 WL at 500-KHz and it was 20-dB quieter than my Inverted-L 
(43x130 feet).

But I found the BOG about 20-dB lower on signals (using NDB's as testing 
sources out to 1000 miles).

I ran a SDR-IQ on 600m with Rx noise floor -130 dBm without antennna; 
-115 to -108 dbm with Inverted-L.  NDB's were in the -90 dBm range 
(except a local one).

My last use of HF had S8 noise on 80m and S5 on 10m.  Not particularly 
quiet.  My HF dipoles were brought down last summer when a tower came 
down in winds and crashed across the wires.  Hope to get T vertical up 
yet this summer (40-foot vertical with 80m and 40m folded-dipoles as top 
hat and base loading coil).  t will be used on 630m or 160m with 300-ohm 
open-wire feed shorted.

73, Ed - KL7UW/ex WD2XSH/45
https://www.kl7uw.com/630m.htm

On 7/24/2023 4:36 AM, Dave Riley via 600MRG wrote:
> When it comes to 630m there seems to be more atmospheric noise than on 
> the upper bands. What is a nominal amount??
> 
> After getting away from the AC line noise there still seems to be about 
> 8-12 db difference between antenna connected vs. a 50 ohm load to the 
> receiver..
> 
> What are your thoughts on this broad band noise??
> 
> Also I use KW twin lead laid upon the ground from the antenna in the 
> woods to the R75 with isolation toroid at each end..
> 
> Is this the bottom of the quest for noise reduction??  Enjoying your 
> thoughts..
> 
> 73s de Dave @ W1FRV
> 
> 
> 
> 
> 
> ______________________________________________________________
> 600MRG mailing list
> Home: http://mailman.qth.net/mailman/listinfo/600mrg
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:600MRG at mailman.qth.net
> 
> This list hosted by: https://www.qsl.net
> Please help support this email list: https://www.qsl.net/donate.html
>