Timeline for Grounding a vertical antenna from a balcony
Current License: CC BY-SA 4.0
12 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 30, 2021 at 13:39 | history | edited | webmarc | CC BY-SA 4.0 |
Added link to another answer that has additional information
|
| Jul 23, 2021 at 14:20 | comment | added | webmarc | Re coiling the coax on the metal railing, ugly baluns are a thing, but that linked answer indicates prob not appropriate for multi band. | |
| Jul 23, 2021 at 14:17 | comment | added | webmarc | Sorry for my imprecise language! I mean a 1/4 wave connected to the shield of the coax at the feed point (not the outside jacket/rubber), I edited the answer. | |
| Jul 23, 2021 at 14:17 | history | edited | webmarc | CC BY-SA 4.0 |
removed imprecise language
|
| Jul 23, 2021 at 13:37 | comment | added | Engineer999 | Would it help if I also wrapped the coax around the metal railings on the balcony a few times? Thanks | |
| Jul 23, 2021 at 13:25 | comment | added | Engineer999 | A little bit confused. "dropping a simple 1/4 wave wire off the balcony, attached to the coax shield" .. you mean sticking wire to the outside of the coax, on the rubber part? Also, my coax is not actually dropping from the balcony, but running straight to it from the apartment. | |
| Jul 23, 2021 at 13:01 | comment | added | webmarc | FYI @Engineer999 also updated answer to point out that 1/4 wave wire drop at 20m will also do the job you need at 10m, so just one wire needed. | |
| Jul 23, 2021 at 13:00 | history | edited | webmarc | CC BY-SA 4.0 |
added more info on sizing the ground leg.
|
| Jul 23, 2021 at 12:53 | comment | added | webmarc | The choke + 1/4 wire at the feed point WILL (perhaps better to say SHOULD?) improve both RX and TX, and the choke at the radio MAY improve RX if there is environmental RFI/Noise that the external shield picks up by acting as an antenna. I expect any apartment building will have plenty of RFI though, and strongly recommend a choke at your transceiver! :-) | |
| Jul 23, 2021 at 12:52 | comment | added | webmarc | The shield current has to go somewhere, and when there isn't a lower-impedance path available, it will certainly run on the outside of your coax shield (yes, common-mode). Dropping a 1/4 wire AND adding an RF choke at the feed point will present a lower-impedance path for that current to run and greatly reduce the common-mode current. | |
| Jul 23, 2021 at 12:49 | comment | added | Engineer999 | Thanks alot for your reply. I appreciate it. Yes, I have ordered some HF RF chokes online and still waiting for them. Somebody recently told me that the chokes won't do much in my case, because I am using an unbalanced antenna with no common mode currents. That doesn't sound right though? Do you think the chokes would even help me on TX aswell as RX ? | |
| Jul 23, 2021 at 12:33 | history | answered | webmarc | CC BY-SA 4.0 |