Re: LF: 23:16 136 G6AVK de EB3FRN-1 Op32 Deep Search 725 mi -40 dB

[DK7FC <selberdenken@posteo.de>]

Hi Luis,

Am 19.05.2015 12:46, schrieb VIGILANT Luis Fernández:
> [...]
> It is amazing to check how just a little of vertical antenna height increase 
> can boost the Tx signal ! :-)
>    
...so maybe it is worth to try a 10m vertical on your high rise 
building? :-)
> The question is .... What should be expected from a Op2H with Dynamic Search ??
>    
For low distances it will work as expected, i.e. about 120/30 = 4 => 6 
dB 'better' but for DX you will need a stable path! This will work on 
VLF but not on LF and not at all on MF.  This is why WSPR-15 is used on 
LF but not on MF.
For MF, something arround QRSS-10 is the slowest useful mode i think, at 
least for DX. See 
https://dl.dropboxusercontent.com/u/19882028/MF/DK7FC_QRSS-10_476_KHz_12-28-2012.jpg 
to get an impression how blurry a QRSS-10 MF signal becomes in some 1000 
km distance.
73, Stefan