Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

Re: LF: Re: 502 CQ

To: [email protected]
Subject: Re: LF: Re: 502 CQ
From: Stefan Schäfer <[email protected]>
Date: Mon, 23 Jul 2012 13:48:51 +0200
In-reply-to: <[email protected]>
References: <002801cd67f2$b2d3bd60$0401a8c0@xphd97xgq27nyf> <7B9F9E1EC7CF44AAB326502FF7F3A6BE@W1KW> <[email protected]> <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
User-agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3

PS: There is no definition that your ears have to be at least as good as your mouth. Especially on LF and MF there are much more RX-only stations who are happy to receive a signal, maybe even in CW. The bigger your mouth, the wider the distance you can reach RX-stations. If i would be a RX-only station on LF, i would be amazed by receiving a signal from e.g. > 3000km. If nothing can be received then i would tend to focus on other bands after some time. And who knows, maybe some of these RX stations become interested to start arranging a TX system as well! On the other side, i am happy to receive signal reports from OMs with big ears. So it is always worth for everyone to do what is possible by the personal limitations, the RX and TX side indenpendently. :-)

73, Stefan/DK7FC



Am 23.07.2012 13:21, schrieb Stefan Schäfer:
Hi Geri,

Am 23.07.2012 08:17, schrieb Holger 'Geri' DK8KW DI2BO W1KW:
Yes, it's partly due to groundwave/skywave conditions but I am already known as the crocodile (big mouth, tiny ears) over here in Northern Germany because my signal is 599 all around while I can barely hear people.

Mostly the description "crocodile" is used by those who are unable (or somehow unwilling) to radiate a decent signal on the band, LF or MF. If a poor antenna is used and then just a few 10 watts RF power, then it may be normal that you cannot hear them, depending on the path and time and QRN situation. If you have a good antenna and high power then it is no problem for others to hear you. If those OMs think "i can hear him but he cannot hear me, so he is a "crocodile"" then this is not your problem. So maybe you simply have a big mouth and normal ears but the other station has a small moth and normal ears! :-)

On LF I had optimized my receiving system pretty much but on MF I have a high noise floor, probably from household electronics.
Hm, normally this is a stronger problem on LF. But PA7EY has reported the same, his LF noisefloor is lower...

One solution surely is to put an e-field antenna some 25m away from the house into the garden, equally far away from all houses in the neighborhood.
Yes this is certainly a good idea. For me this is no option though.

Currently I am using my transmitting umbrella antenna to receive, which always proved best on LF but probably needs some re-thinking for MF.
My transmit antenna produces a big receive signal level of course but the S/N is at least 6 dB worse than the small active E field probe produces! (Of course i used an attenuator to achieve the same signal level, for comparison).



73, Stefan/DK7FC


<Prev in Thread] Current Thread [Next in Thread>