Yes Alan.

 

I just compute the loop antenna using the new EZNEC Pro V 6.0

 

As you predicted the front to side is sharp and deep only at very low angles, that means for ground waves on day light.

 

About the DK7FC night reports : his location is at 45° azimuth outside my loop plane, and 390 km of distance means a site wave of about 55/60° for an usual F1 + F2 layer at a night altitude of 350 km. In that case, the signal is only 0.8 dB lower than a signal coming at same distance and in the plane of the loop.

 

For long distance, as 2° site angle for 3500 km, the front to side is not 0.8 dB but 20 dB….

 

On the way, I just made very accurates measurements on this transmitting loop antenna. In accordance with the EZNEC, I found for 1 Watt TX, 6 milli watt EIRP. This is an average value for 20° to 80° site waves. With 6 mW EIRP, a night report of -16 dB at 390 km is normal when the MF band is very quiet as last night.

 

Andy.

 

 

From: Alan Melia

Sent: Tuesday, July 28, 2015 12:29 AM

To: [email protected]

Subject: Re: LF: F6CNI to night testing a tuned loop TX on MF

 

I think there is quite a lot of high angle off the side......the "null"is only at zero degrees elevation.??

 

Alan

G3NYK

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

From: DK7FC

To: [email protected]

Sent: Monday, July 27, 2015 11:03 PM

Subject: Re: LF: F6CNI to night testing a tuned loop TX on MF

 

Hello Andy,

How is this possible? Your Loop points to SE, my loop also points to SE. But we are not in one line. Actually it would be best for us if our loops would point to NE.
But i can receive you at -16 dB SNR in WSPR with 1 mW ERP ??

73, Stefan