Doug

If you want to HEAR the signals with sufficient strength to work normal CW . Large antennas of the kind I mentioned are normal on 160 metres for working long haul DX.

Micro RX antennas are only useful for VISUAL QRSS signal observations or receiving Broadcast high power stations.

Let me know when you HEAR an Amateur radio  EU signal with a micro antenna at your qth.

I can only HEAR signals on LF/MF from the USA with sufficient strength for a CW audio QSO using a my large wire antenna system.

They are visible on micro antennas at QRSS speeds but not AUDIBLE

 

de mal/g3kev

 

----- Original Message -----

From: Douglas D. Williams

To: [email protected]

Sent: Monday, January 02, 2012 9:53 PM

Subject: Re: LF: Antennas

Mal, you lost me on this one. Are you suggesting I (or we.....here in North America) erect large verticals, inv L systems, Rhombics, and V beams in order to receive EU LF signals?

 

 

I thought I was doing pretty well with my micro RX antenna!

 

 

Doug KB4OEr

 

 

On Mon, Jan 2, 2012 at 6:28 PM, mal hamilton <[email protected]> wrote:

LF es MF

Reports from across the pond and other DX locations as far as Tenneesee and Kansas using micro probe antennas are great for QRSS speeds but not suitable for audio reception.

Take 160 metres for example where it is normal to work world wide on cw but antennas in use are large verticals, inv L systems, Rhombics and V beams, therefore to have any chance of receiving signals at audio level on LF or MF large antennas of the calibre used on 160 metres are necessary.

As well as TX at this QTH I also use large arrays for RX and often hear signals from NA that would not be audible with small loops, micro probes or ferrite sticks

Recently on 500 I was able to copy a W stn 579 but a DL stn copied only on screen, when I asked what strength the signal was I got no reply!!!!!!!!!!!!! using a micro probe antenna.

If a proper large antenna system is not used on LF es MF then there is virtually NIL chance of an audio report from across the pond for EU stns es vice versa

Back some years ago I had audio reports from the Boston area but the antennas were proper wire arrays as used on 160 metres

Small hand held antennas are fine for High Power  BC strength signals but not for low power amateur signals to be heard

No commercial LF/MF station would even consider an antenna of the micro variety.

When I was in the business some years ago on LF/MF Rhombics and V-Beams were the norm

de mal/g3kev