| Home |
| Search |
| Today's Posts |
|
|
|
#1
March 25th 18, 12:16 PM
posted to rec.radio.amateur.antenna
|
|||
|
|||
Antennas That Don't Need Grounding For An Apt.
On 25/03/2018 04:09, wrote:
I am taking my ham test in two weeks and I just found out you have to ground your equipment. I live in a apt without copper, water pipes. I have heard a dipole antenna would work. Any comments. so would a loop antenna; no ground required. -- --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus |
|
#2
March 25th 18, 03:15 PM
posted to rec.radio.amateur.antenna
|
|||
|
|||
|
Antennas That Don't Need Grounding For An Apt.
In message , Catweazel
writes On 25/03/2018 04:09, wrote: I am taking my ham test in two weeks and I just found out you have to ground your equipment. I live in a apt without copper, water pipes. I have heard a dipole antenna would work. Any comments. so would a loop antenna; no ground required. I have a feeling that you might not be quite ready for your test - unless the level required is (say) only for you to know where the on-off switch is, and which socket is for the antenna and which is for the microphone. But to answer your post, it rather depends on what purpose the 'ground' connection serves. If it's only for safety, it may serve no function for carrying RF currents. If the ground IS for RF purposes, maybe it helps if you think of feeding RF into an antenna as being a bit like when you're sitting in a rowing boat on a lake - but without any oars. Assuming you don't resort to paddling with your hands (!), there are two obvious ways you can make your boat (the RF) move: 1. Push against something that can't move (for example, the shore). In this case, the shore doesn't move, and all the movement goes into your boat. 2. Push against something that CAN move (for example, another, similar, rowing boat). In this case BOTH boats will move - but half of the movement goes into your boat, and half goes into the other boat. [I'll leave it to you to work out which (rather crude) analogy applies to an antenna that needs a ground, and which one doesn't.] Of course, with some antennas the 'ground' might not be a physical connection to ground (earth). The 'ground' (which doesn't radiate) might be part of the antenna system that simply makes the 'hot' side of the antenna (which does radiate) think that it DOES have a ground. But as I said, before your test, you might need to do some very basic study on some of various types of antenna, and how they work. -- Ian |
| Reply |
| Thread Tools | Search this Thread |
| Display Modes | |
|
|
Similar Threads
|
||||
| Thread | Forum | |||
| [KB6NU] One-Day Tech Class Videos: Dipole Antennas and Vertical Antennas | Moderated | |||
| Pictures of your antennas in the Antennas in the World directory | Antenna | |||
| grounding | Antenna | |||
| Grounding | Shortwave | |||
| Grounding Rod | Shortwave | |||
Hybrid Mode
