From: "Mike Dennison" <mike.dennison@ntlworld.com>
To: rsgb_lf_group@blacksheep.org
Date: Mon, 23 Jul 2012 10:03:09 +0100
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In-reply-to: <43A1879A-58FF-480A-A148-65811EAB486E@dk8kw.de>
References: <002801cd67f2$b2d3bd60$0401a8c0@xphd97xgq27nyf>, <500C35E0.8010507@iup.uni-heidelberg.de>, <43A1879A-58FF-480A-A148-65811EAB486E@dk8kw.de>
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Subject: LF: Receive interference at MF
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Geri,

Have you looked at your ground system? On 136kHz a network of earth 
stakes works well as a receive ground. However, I have found that at 
MF (including topband) I need insulated radials to reduce the 
interference from household electronics, particularly my own plasma 
TV. On 500kHz, the best results involve disconnecting one (but not 
all) of my earth stakes, and on topband I disconnect all of the 
stakes. My garden is only 20m long but I still get receive 
improvements with radials. 

Mike, G3XDV
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

> 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. On LF I had optimized my receiving system pretty much but on
> MF I have a high noise floor, probably from household electronics. 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. Currently I am using my transmitting umbrella antenna to
> receive, which always proved best on LF but probably needs some
> re-thinking for MF. Additionally I got hold of a R&S EK070 on EBay
> last week and I am eagerly waiting for it to arrive. At least then
> nobody can complain that my receiver is lousy ;)
> 
> Lots of things to do and to explore on MF, which is a great part of
> the fun. And until I am fully set up for TX and RX on 475 kHz I use
> some non-amateur communication devices such as Echolink and VHF
> repeaters to do my day-to-day communications ;)
> 
> Best 73
> 
> Geri, DK8KW & DI2BO
> 
> 
> On 22.07.2012, at 19:18, Stefan Sch=E4fer
> <Stefan.Schaefer@iup.uni-heidelberg.de> wrote:
> 
> > Geri, 
> > 
> > I bet it is only due to groundwave limitations. Normally you should
> > hear Mal. So far he is the strongest signal i heared on MF. But at
> > 11 UTC you can forget about MF skywave, at least in central Germany
> > and in summer.
> > 
> > Last night DF0WD and DF6NM were perfectly audible. But this is after
> > 0 AM local! Later even the QSB was lower and the signals stronger.
> > 
> > 73, Stefan/DK7FC
> > 
> > 
> > Am 22.07.2012 12:24, schrieb Holger 'Geri', DK8KW - DI2BO - W1KW:
> >> 
> >> Mal,
> >>  
> >> Sorry, no coppy here, however, I know that my rx-equipment needs
> >> improvemen. EK 070 and Mini Whip is already on order ...
> >>  
> >> 73
> >>  
> >> Geri, DK8KW & DI2BO
> >>  
> >> ----- Original Message -----
> >> From: mal hamilton
> >> To: rsgb
> >> Sent: Sunday, July 22, 2012 12:13 PM
> >> Subject: LF: 502 CQ
> >> 
> >> MF
> >> Now CQ  around 502 on CW
> >>  
> >> De mal/g3kev
> >>  
>