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| To: | [email protected] |
|---|---|
| Subject: | Re: LF: Re: 500 Khz - QSO |
| From: | John GM4SLV <[email protected]> |
| Date: | Mon, 5 Sep 2011 05:05:15 +0000 |
| In-reply-to: | <F45EBB668CC14720966DE074B23B242D@JimPC> |
| Organization: | The Gammy Bird |
| References: | <001201cc6a48$c8123dd0$0401a8c0@xphd97xgq27nyf> <20110903152500.2cbf2a9e@svr1> <9443BF673E7A4E51BBF052ADEA904B4C@JimPC> <000b01cc6a61$f7fff320$0401a8c0@xphd97xgq27nyf> <75882620F84F479F923F293AD072104F@JimPC> <001d01cc6af4$7fcd30a0$0401a8c0@xphd97xgq27nyf> <alpine.WNT.2.00.1109041140052.1572@opc1> <F45EBB668CC14720966DE074B23B242D@JimPC> |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
On Mon, 5 Sep 2011 01:08:14 +0100 "James Moritz" <[email protected]> wrote: > Dear John, LF Group, > > This came up with field strengths at G3KEV of +7dBuV/m, and at > G3XIZ/M0JXM of -12dBuV/m, so a 19dB reduction in signal level due to > the extra distance over land Thanks Jim for quantifying the problem. That does make a compelling argument as to why Mal hears me with ease in the daytime, and Chris et al cannot. > So I guess a quiet location for GM4SLV's RX could account for being > able to receive the southern stations in Shetland, but not the other > way round. > Again, thanks for putting some figures on it, and I'm sure this accounts for the non-reciprocal nature of the propagation. The only thing will improve matters is for me to radiate higher ERP. But to redress the balance - but it looks like 10dB or more would be required. That's going to take some thinking about! Thanks John GM4SLV |
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