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

To: [email protected]
Subject: Re: LF: 23:16 136 G6AVK de EB3FRN-1 Op32 Deep Search 725 mi -40 dB
From: DK7FC <[email protected]>
Date: Tue, 19 May 2015 14:50:53 +0200
In-reply-to: <[email protected]cal>
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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

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