We’re rewarding the question askers & reputations are being recalculated! Read more.

Questions tagged [grounding]

Use this tag for questions relating to RF and DC grounding in radio equipment. Specifically suggested methods, practices, equipment and regulations regarding grounding.

Filter by
Sorted by
Tagged with
2
votes
2answers
85 views

Does RF go through thin corrosion better than DC?

I might have a bit of a problem with my groundplane, but I am unsure. I am using a ground screen instead of radials. The problem is the ground screen is made of galvanized metal, but I can see that a ...
0
votes
2answers
65 views

ISOTRON 80m 75m Antenna Position

I know, a dipole is the way to go, but cannot fit one, only a 'birdhouse' antenna like the 75m 80m Isotron antenna. Is it better to put at 15 feet Above Ground Level outside, or 20 feet AGL ...
3
votes
1answer
75 views

Does copper wire get sold as flat straps to reduce inductance?

The extra book (11-9) safety section mentions that a "large diameter wire, or even better, a wide flat strap, has the lowest inductance and makes the best ground connection." Does anyone actually have ...
1
vote
1answer
75 views

Grounding for an upper floor shack

My shack is on the second floor, 4m from the ground. My main antenna is a base loaded vertical, using the metal roof (10x6m) as a ground plane. When I operate in 20 and 40 meters, it's pretty ...
2
votes
2answers
56 views

Grounding of a portable setup

I am occasionally using an extremely simple shortwave portable setup consisting of a battery, the transceiver, a short coax feedline and a vertical half-wavelength vertical antenna with a transforming ...
2
votes
1answer
74 views

How do I interpret the FCC ground conductivity files

The FCC has .seq files that show ground conductivity which it makes available for download. Unfortunately, there doesn't appear to be any documentation that comes with the files, or even headers. I ...
3
votes
2answers
116 views

Grounding a chimney mounted antenna

I'm installing a new antenna mast to hold one or more antennas. The new mast will be strapped on to a chimney near the center of my house. Coax will run down the mast, across the roof, down the side, ...
3
votes
1answer
138 views

What are the effects of a ground plane under a horizontal dipole?

What are the effects on signal propagation if this ground plane is just a metal object and what are the effects if the ground plane is actually grounded? I am asking this question because someone ...
1
vote
3answers
222 views

Do I have to disconnect antennas during thunderstorms?

lightning damage can be extensive and costly, its even life-threatening. If I have properly grounded the equipment and have a Surge protection device, do I have to disconnect the antennas during the ...
2
votes
1answer
75 views

Ufer ground and ground rods

I am about to build a new house with a ham shack incorporated in it. I am considering installing number 4 copper wire in the foundation around the perimeter as my ground ring. Is it necessary to ...
1
vote
2answers
278 views

Counterpoise/ground/radial options for an Inverted L

I have two 10-meter masts to support a 40-meter inverted L. I have a decent enough sized yard that I have a few options for counterpoise/ground/radial. I could run 1/4 wave radials in several ...
1
vote
4answers
432 views

Is the ground on the back of the Icom IC-7300 an electrical or RF ground?

On the back of the Icom IC-7300 there's a ground connector: The manual goes on to say this: Is this an electrical or RF ground?
2
votes
2answers
102 views

What's the earth in this antenna exactly?

This antenna: comes with an balun (or unun) that has three connectors. One for the coaxial cable to the radio, one for the antenna and one for the earth. My understanding is that the earth is an RF ...
1
vote
2answers
167 views

Wiring questions: grounding, attic antennas, BNC connectors

I am upgrading from an HT to a Kenwood TM-V71A. Yay! But this means I need to install some antennas and run feed lines into my shack. I'm going to be installing antennas in my attic (the feed lines ...
0
votes
3answers
246 views

RF ground and balanced antennas

Suppose that a ham radio setup uses several antennas with a 50 ohm coaxial switch to operate some natively unbalanced antennas and some balanced ones through baluns at the feedpoint. An RF ground for ...
3
votes
1answer
315 views

Is a J-pole an appropriate antenna for mounting to a steel handrail?

Last year, a group of us placed a battery-powered 2m digipeater using a J-pole antenna on a mountaintop. We're planning on doing the same this year except we plan to use a surge arrestor from the feed ...
3
votes
1answer
100 views

Electrical Earth

I have moved to a new flat which is on the 4 floor, luckily the landlord has let me put an OCF dipole outside with coax feeding through an existing hole in the window frame. I'm looking for some ...
3
votes
2answers
253 views

Antenna installation for a base station

I have a detached garage that is approximately 15 feet high. The garage is approximately 20 feet from my home I will be using a Kenwood D-710GA radio, a Grandmaster SWR Meter and a 6 foot comet GP-3 ...
3
votes
3answers
164 views

How do I get my crystal radio to receive?

My 8 year old and I are trying to figure out how to get this crystal radio we made working. It's based off this youtube video. We get clicks when we put the crystal ear piece either side of the ...
1
vote
1answer
237 views

Grounding plan for new ham shack - good/bad idea?

I have been researching and trying to plan out how to run the grounding/cables for a new ham radio room that will be in a new cabin being built. Since I am starting with dirt, I should have ...
3
votes
2answers
284 views

Not-too-distant saltwater ground

Problem I'm planning on mounting a vertical HF multiband antenna on the edge of my roof. Due to the presence of a paved walkway and some other similar property constraints, I have no room for ...
1
vote
1answer
507 views

SDR - discone antenna setup

Here's a picture of my SDR receiver setup... This entire setup lives indoors as I'm not able to put anything up on the roof right now. My understanding of a discone antenna is that the downward ...
3
votes
3answers
345 views

Baofeng radio produces hum when plugged into charger

So I am working on a low cost ham radio beacon using my Baofeng UV-5R radio because it is easy to use and portable. I built a simple PTT interface for a Raspberry Pi and wrote some python to transmit ...
4
votes
1answer
776 views

Antenna, input and ground bonding

I'm new to this and am in need of guidance. I am mounting a multi-band antenna on a 50 foot tall 1 1/4" galvanized mast. I plan to drive a ground rod at the base of the antenna and bond the mast to ...
2
votes
3answers
1k views

Lightning protection by disconnect

Currently I am evaluating options for my antenna's in regards to lightning protection. My setup is a physical disconnect of all my antennas using an outside "patch panel". So every time I power up ...
4
votes
4answers
2k views

I am installing a ham radio and want to properly ground it

I am installing a ham radio and want to properly ground it. I will be including a lightning arrester that will also go the the ground. I will have a 20' mast with a long wire antenna running 130+ ...
2
votes
2answers
559 views

Grounding Help - Where To Route My Wires

Here is my situation. My antenna mast is on the opposite side of the house from my ham shack, same with the power service entrance. I have installed ground rods roughly every 16 feet with #6 wire ...
1
vote
2answers
715 views

MIC microphone ground vs common (PTT, chassis etc) ground

How do we reconcile the ground connection between audio eqp (TNCs, soundcards etc) and transceiver? Most of the audio eqp for digimodes has only one ground. I've seen that the common practice is to ...
0
votes
1answer
214 views

guard planes in differential antenna PCB designs

The designs I have seen all seem to have this surrounding stitched-to-the-ground copper pour surrounding them. Why put it on a differential antenna PCB like below ? And why are those thin lower left ...
3
votes
3answers
979 views

What do you connect antenna Radials to?

I am trying to communicate between two arduino microcontrollers using radio. For this purpose I am building a whip antenna with 4 ¼ wave radials. I've done a bit of reading and have got most of it, ...
4
votes
4answers
3k views

Grounding a dipole

How do you properly ground a dipole (RX only for VHF scanning) to protect it against ESD/lightning? In my set up i'm putting a dipole on my roof. I've connected the two dipole elements together with ...
5
votes
1answer
351 views

How can I counter DC-DC inverter noise / ground noise in an electric-vehicle mobile setup?

So, I'm relatively new to all this; and I've gotten an ICOM IC-7100 on sale, which looks like an excellent transceiver … unfortunately, this very specific line shows up in the manual: The ...
4
votes
1answer
804 views

Bonding of Coax shield to RF ground conductor for long ground runs?

My shack is on the second floor of my home, and I run a single operator, 2 radio contest setup. The two coax runs pass through the wall and drop down to an antenna switch approximately 15 feet from ...
2
votes
5answers
611 views

What would be the easiest and most cost effective ground system for a startup UHF/VHF station

I just passed both my Technician and General Class license this past weekend, and am now contemplating my first station. To get my feet wet I'm planning on getting a Yaesu FT-7900R Dual band Radio ...
2
votes
4answers
1k views

Is my ground plane good?

I have a Cobra HG A1500 on a 1998 Ford Ranger. Due to clearance issues I cannot mount it on my roof, so I put it in front of my windshield by the wipers. Will this give me good enough ground plane to ...
2
votes
1answer
734 views

Why does a counterpoise need to be grounded

I made a 1090Mhz antenna for ADS-B following the instructions from sprut.de. The antenna looks like below and I made it from the copper centre of some stripped coax: The instructions say: Now we ...
1
vote
2answers
124 views

Does a station that's only going to receive require grounding

So I'm looking at building a satellite receiving stations (amateur bands). I know that a station that is transmitting requires grounding of the RF components due to the high power of the transmitter, ...
2
votes
1answer
193 views

Should I ground a 2 array crossed yagi-uda antenna?

I am using 2 array crossed yagi-uda antenna operating at 437.025 MHz. Where and how should I ground it? Should I ground at mast of antenna or to its metallic boom?
9
votes
3answers
11k views

Should I ground my radio to the chassis or battery for a mobile install?

From what I've seen, there are generally two ways to power a mobile radio: Positive lead to battery, negative lead grounded to chassis Both positive and negative leads to battery I know that ...
2
votes
1answer
334 views

Low frequency noise on ground line. Why?

I'm currently experiencing what I think is induced coupling on my ground line. Can someone explain how this is possible? I live on the third floor of an apartment block and my only grounding option ...
3
votes
1answer
1k views

Counterpoise from artificial ground vs base of antenna

I have an MFJ-934 tuner/artificial ground for my MFJ-1699 multi-band vertical (stuck on a balcony, so limited HF antenna options), and I'm wondering if there's any downside to the counterpoise ...
9
votes
5answers
2k views

Grounding a second-story shack with an outdoor antenna

My shack is on a second story, really far away from the house ground. To run a ground from my equipment to the outside/ground is a run of at least 60-75 feet. The antenna is at least 100 feet away as ...
2
votes
1answer
1k views

What are the effects on an ATAS-120A screwdriver antenna with a limited ground plane?

I'm going to be installing an ATAS-120A screwdriver antenna at the corner of a metal roof building, without radials going out over 270 degrees of the plane it's on. Will this significantly change the ...
4
votes
2answers
3k views

Can I ignore the radial elements of a 2m/70cm antenna if it's on a metal roof?

I'm looking for a dual band base station antenna, and find that many of them have short radials around the base. Due to the specifics of my installation, I need to remove them. However, it is being ...
2
votes
1answer
435 views

Will these wires affect antenna performance negitavely?

We moved into a new house, and I noticed these wires sticking up for some sort of tent thing for shade. •I tested the wires to the 3rd prong in the outlet, and it showed a DC dead short to ground. •...
7
votes
5answers
2k views

Using Earth as an RF ground

I have built a simple ground plane antenna for 70cm with a connector, 4 radials, and one vertical element. The RF ground is connected to the radials, and the RF is connected to the vertical. It got ...
8
votes
2answers
303 views

Why is an RF ground not as critical as the other, and can they be used backwards?

I will give the magmount antenna as an example: The vertical element to the antenna is very critical, cut to a certain wavelength, often added with some loading coils, or a little spiral to make ...
4
votes
2answers
2k views

Does effective grounding of mobile (vehicle) antenna mounts address common-mode currents?

While researching how best to install my mobile amateur radio in my car, I didn't understand if there was optimum Antenna Feedline Length for mobile installations? Understanding that this is caused ...
8
votes
2answers
6k views

Grounding VHF base station antenna

I'd like to install an outdoor dual band VHF/UHF base station antenna, a simple pole antenna like the Comet GP-1. I live in an area where lightning is rare, but not unheard of. Should I drive ground ...
8
votes
1answer
57 views

Testing a possible grounding point?

Some multi-story buildings in my region require earthquake isolation on some of the piping. Thus my question. Is there a way to determine whether a nearby metal water pipe is actually Earth grounded,...