UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - How effective is an earth for reducing noise on AM?

QQVO6/40 · 1st Dec 2020, 4:06 am

G'day everyone.
I have played with random wire antennas and various earth arrangements and all with differing achievements.
Without doubt in my eyes there is no one solution for the noise problem. As other posters have made mention it is becoming quite prevalent in our modern times.
I think you have to just try different approaches to find a solution.
Now if I may deviate just a little.
I have found and played with a novel approach to the noise problem.
So easy to try and I guarantee you will already have the bits to make it.
A "low on ground loop antenna".

https://kk5jy.net/LoG/

Well worth a read.

I have made and played with a few of these and all perform a treat. The only difference I have is I make the loop round rather than square and I make it larger for the lower frequencies.
These really drop the QRM noise level a lot. Where I live I have 3 neighbours with very noisy solar power supplies and all manner of electronic devices. With conventional wire antennas I can not listen to AM broadcast stations or very much short wave radio.
I use the log loop for receive and a vertical for transmit.
Anyway, I won't rave on. I have offered my bit and I hope it helps.

Cheers all.
Robert.

1st Dec 2020, 4:06 am	#35
QQVO6/40 Hexode Join Date: May 2009 Location: Newcastle, Australia Posts: 319	Re: How effective is an earth for reducing noise on AM? G'day everyone. I have played with random wire antennas and various earth arrangements and all with differing achievements. Without doubt in my eyes there is no one solution for the noise problem. As other posters have made mention it is becoming quite prevalent in our modern times. I think you have to just try different approaches to find a solution. Now if I may deviate just a little. I have found and played with a novel approach to the noise problem. So easy to try and I guarantee you will already have the bits to make it. A "low on ground loop antenna". https://kk5jy.net/LoG/ Well worth a read. I have made and played with a few of these and all perform a treat. The only difference I have is I make the loop round rather than square and I make it larger for the lower frequencies. These really drop the QRM noise level a lot. Where I live I have 3 neighbours with very noisy solar power supplies and all manner of electronic devices. With conventional wire antennas I can not listen to AM broadcast stations or very much short wave radio. I use the log loop for receive and a vertical for transmit. Anyway, I won't rave on. I have offered my bit and I hope it helps. Cheers all. Robert.