inverted U antenna #chat


Martin - M7MNP
 

Hi Chris / everyone! 

Chris - had your inverted U up and running now for well over a year now, and It's still cracking - I'm just wondering if you have a radiation pattern you can share? 

I have it on two 12m poles and about 15m spacing between them. I have also extend the earth lead by another 6m at each end with extra earthing rods. This has taken the noise 
level below S2, S3-4 on a bad night (With my old HF Vertical,  that was around s9 on a good night!) 

If you ever get around to doing a Mk2 of the Inverted U - I'll be the first in line to buy it! 
thanks Chris

Kind regards
Martin M7MNP.


Chris Moulding
 

Hi Martin,

Good to hear that the TIU is working well for you.

Regarding antenna patterns, on the web page is a file that can be opened in the antenna modelling program 4NEC2.

You can then change the mast heights and spacing to suit your location and run the program to check the antenna pattern at different frequencies.

For my own ham station I'm experimenting with NVIS antennas so the Mk2 is likely yo be a NVIS version.

Regards,

Chris


Martin - M7MNP
 

Thanks Chris..

Is there a paper on how I can get the data into 4NEC2 or has someone got the Nec source file I can play around with?

 

Thanks

Martin M7MNP

 

From: CrossCountryWireless@groups.io <CrossCountryWireless@groups.io> On Behalf Of Chris Moulding
Sent: 20 September 2022 10:33
To: CrossCountryWireless@groups.io
Subject: Re: [CrossCountryWireless] inverted U antenna #chat

 

Hi Martin,

Good to hear that the TIU is working well for you.

Regarding antenna patterns, on the web page is a file that can be opened in the antenna modelling program 4NEC2.

You can then change the mast heights and spacing to suit your location and run the program to check the antenna pattern at different frequencies.

For my own ham station I'm experimenting with NVIS antennas so the Mk2 is likely yo be a NVIS version.

Regards,

Chris


Simon
 

If memory serves me..
4nec2 is free, download install On pc.
Download Chris’s file, open in 4nec2
Job done.


martin.porter@...
 

Thanks Simon! Just need to find out how to modify it now - but thanks again.

-----Original Message-----
From: CrossCountryWireless@groups.io <CrossCountryWireless@groups.io> On Behalf Of Simon
Sent: 20 September 2022 18:06
To: CrossCountryWireless@groups.io
Subject: Re: [CrossCountryWireless] inverted U antenna #chat

If memory serves me..
4nec2 is free, download install On pc.
Download Chris’s file, open in 4nec2
Job done.


dgw007
 

Hi Chris,  can I ask why you stopped production of the inverted V antenna? I have found mine to be very good,   with the Wellbrook no longer used.

Its been up for quite a few years now ,  had no issues, but wondering what I would replace it with if that time comes. 

On Tue, 20 Sept 2022, 10:32 Chris Moulding, <chrism@...> wrote:
Hi Martin,

Good to hear that the TIU is working well for you.

Regarding antenna patterns, on the web page is a file that can be opened in the antenna modelling program 4NEC2.

You can then change the mast heights and spacing to suit your location and run the program to check the antenna pattern at different frequencies.

For my own ham station I'm experimenting with NVIS antennas so the Mk2 is likely yo be a NVIS version.

Regards,

Chris


Chris Moulding
 

Due to restricted access to the workshop at the start of the Covid lockdown we stopped making all products except the LAA++ and the HF/VHF/UHF Multicoupler.

We are gradually bringing some of the products back but have had to stop due to the demand for LAA++ and HF Multicouplers caused by customers monitoring the battlefield HF traffic from Ukraine.

The plan is to bring the 9:1 balun and resistor unit for TIU antennas next with the Broadband Active Antenna soon after that.

Regards,

Chris


JayMot
 

On Wed, Sep 21, 2022 at 05:59 PM, Chris Moulding wrote:
The plan is to bring the 9:1 balun and resistor unit for TIU antennas next with the Broadband Active Antenna soon after that.
Put me down for both of those when you start manufacturing them again. I'm tired of S7 to S8 noise levels every sunset when the LED streetlights turn on. I can't even listen to 40 meters at night when the band's active.