Coax receiving loop only 160m

17/09/2021

I already made this one and gave it away to ON4PQ.
At that time it was there but was never used;
After my lecture about RX antennas, I finally gave them to ON4PQ after having used them for 12 years.

Then why make the same again?

 

I used to have those for 160 and 80m, now I made that monoband for 160.
The antenna will be tuned to FT8 freq on 160m and again it is set up in a fixed direction namely 340°.
This is the same degrees as the FO0AAA delta RX loop.
Because there are no details photos on this link .

I will make on this page some more information how i made that loop. ( again)

 

 

 

 

 

 

 

As always, I still had 75 ohm coax, but I did use the thicker version, the PE11 (telenet).
This has a length of 6.1m and exactly in the middle you will remove the cloak about 1 cm.
Once you've removed it, I'm going to seal it with vulcanizing tape.

If you also want to make it for 80m at the bottom of this page you will find the link to the site with all the correct dimensions.

I use BNC connectors for a simple reason I have these in stock multiple .

These are Amphenols, they have a sealing ring and are of good quality.

The box makes no difference as long as you can keep it moisture-free.

 

 

 

 

 

 

 

I'm going to mount BNC connectors on both ends of the coax, simple reason this was what I had in stock.
Should you take connectors? no, you can make this yourself without using any  connector.
From my experience it is best to do it this way but that choice is yours.

 

 

 

 

 

 

 

I used my old cross that I had .
After all these years I have now treated this with a moisture-resistant product so that it can serve again for a few years.
The horizontal arms are from my old qubical quad (fibreglas poles)

As you might see in the picture they are really old I bought them when I still lived in Peer and that was from 2003 ago.

 

The top of the coax where you removed the sheath is now sealed and I mount it with simple cable clamps if you don't do this the chance that the core will break is very high because 75 ohm coax that core is not as thick as RG 213.

 

 

 

 

 

 

 

Meanwhile, using straps to hold the coax horizontally in place and from there I mount the box in the middle until I've made a reasonable cross.

 

 

 

 

 

 

 

Everything is conected and now waiting for my arco 468 to tune them.
The coax to the RX coax switch is already there and everything has been resealed with vulcanizing tape.

 

 

I know what to expect with this loop... very limited bandwidth but again it will only be used as a comparison for the 9 RX circle array.

Reference antenna no more than that because the reception angle is completely different with this antenna than with another RX antenna.

 

 

So why this antenna?
The 9RX circle must have a much lower reception angle than this I thought it was about 80°. The 9 RX circle array is much lower that means that I have to hear more European stations on this than on the 9 RX (approximately).

 

 

The future will show whether this is true.

The link to the original manual is this. (Link)