Help with Earth please ?....

SWLing and TX Forum, for everything below 30MHz...

Help with Earth please ?....

Postby USAFE501 » Sun Feb 03, 2019 2:38 am

Hi Guys,
Wonder if anyone can help ?
Currently have my HF receiver in the downstairs spare room , with short length of coax leading outside to my long wire - between them is my small red balun that the coax connects to on one side with 259 plug/socket and the long wire connects via a termination thread/wing nut type connection on the other side of the balun.

My question is should I run an earthing wire from balun , coax or long wire into the ground and if so , at what point ? :huh:

Thanks in advance
K :smiles:
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Re: Help with Earth please ?....

Postby m0lsx » Sun Feb 03, 2019 12:06 pm

The earth at the Balun is different to the one at the receiver. If the wire from the receiver is short, then I would run one at both the receiver & the balun. As the one at the balun helps to reduce noise at the receiver. The earth you put in for a TX to chassis is different again.

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Re: Help with Earth please ?....

Postby m0lsx » Sun Feb 03, 2019 12:14 pm

The way I normally run a balun on TX, is I keep the balun close to the ground. Although maybe out of hands reach where I do not have control over the enviroment. (On RX preventing fingers from touching anything is not important, other than during thunder storms.) I then run a short (insulated) wire from the balun to an earth stake. I also where ever possible, use an earth onto the radio, regardless of it is being used on RX only or not. However if it's a tranciver & the earth wire is more than a few meters long (say 3 to 5 meters) then I use what is called an artificial earth at the tranciver. As a longer earth wire can become part of the antenna system as it can become resonant & that adds problems, not removes them.

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NB. One word of warning. If you ever start transmitting & want to use a artificial earth. ALWAYS fold the end of the short earth wire over & cover it well with insulating tape as the end of a tuned counterpoise. Which is what this is. Has very high voltages & will set fire to carpets etc.
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Re: Help with Earth please ?....

Postby USAFE501 » Wed Feb 06, 2019 2:04 am

Hi Everyone,
Especially M0slx...really appreciate the comprehensive answers :thumbup: :thumbup: :thumbup: :thumbup:

Love this forum !!!! :smiles: :smiles:

K :wink:
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