Search found 134 matches
- Sat Apr 27, 2024 1:12 pm
- Forum: Questions & Advice
- Topic: EFHW/RW - Attaching wire to balun
- Replies: 15
- Views: 625
Re: EFHW/RW - Attaching wire to balun
An example, using a radiator (wire) of 84ft and a counterpoise of 17ft a 9:1 and a wideband choke (Guanella) both wound on FTxxx-43, we'll have a random covering all bands (including WARC) from 80 to 6 meters
- Sat Apr 27, 2024 11:43 am
- Forum: Questions & Advice
- Topic: EFHW/RW - Attaching wire to balun
- Replies: 15
- Views: 625
Re: EFHW/RW - Attaching wire to balun
as for the radiator length, see here https://k7mem.com/Ant_End_Fed.html#Not_Random_Multi ensure to add a good guanella choke after the 9:1 and use at least one counterpoise wire with a lenght around 1/16 Lambda at the lower frequency (e.g about 5m if the lowest frequency is 3.5MHz, eventually add a ...
- Sat Apr 27, 2024 11:23 am
- Forum: Questions & Advice
- Topic: RG-174 or RG-316
- Replies: 1
- Views: 58
Re: RG-174 or RG-316
https://www.alphaantenna.com/wp-content/uploads/2022/09/What-Coax-Should-I-use.jpg https://www.alphaantenna.com/wp-content/uploads/2022/09/What-Coax-Should-I-use.jpg consider that every 3dB of gain or loss the power doubles or halves, so a 3dB cable loss means that the antenna will receive half of t...
- Thu Apr 25, 2024 6:11 pm
- Forum: Questions & Advice
- Topic: EFHW/RW - Attaching wire to balun
- Replies: 15
- Views: 625
Re: EFHW/RW - Attaching wire to balun
looks good !
the carabiner hole is useful both when the antenna is deployed and to hang it to a backpack wnen the antenna is wrapped, the velcro stripes will help keeping the wire/coax wrapped
the carabiner hole is useful both when the antenna is deployed and to hang it to a backpack wnen the antenna is wrapped, the velcro stripes will help keeping the wire/coax wrapped
- Wed Apr 24, 2024 3:16 pm
- Forum: Questions & Advice
- Topic: EFHW/RW - Attaching wire to balun
- Replies: 15
- Views: 625
Re: EFHW/RW - Attaching wire to balun
Just to try explaining it better, see the image below (ugly but hopefully "readable")
- Wed Apr 24, 2024 6:15 am
- Forum: Field Kits and Reports
- Topic: Bring lots of different types of antennas, just in case
- Replies: 9
- Views: 564
Re: Bring lots of different types of antennas, just in case
Please, post an update when you'll try it !
- Tue Apr 23, 2024 3:45 pm
- Forum: Questions & Advice
- Topic: EFHW/RW - Attaching wire to balun
- Replies: 15
- Views: 625
Re: EFHW/RW - Attaching wire to balun
A suggestion, make the "box" hosting the 9:1 and choke a bit longer so that the two toroids will sit flat side by side laying on the bottom and not one over the other, also consider enlarging the sides a bit and having some rectangular slot holes at the sides, these will serve to host some...
- Mon Apr 22, 2024 11:24 am
- Forum: Field Kits and Reports
- Topic: Bring lots of different types of antennas, just in case
- Replies: 9
- Views: 564
Re: Bring lots of different types of antennas, just in case
Ok, now I feel like a dummy. I have a TransWorld TW2010 (pretty much a commercial version of your double T bar) but I was concerned about taking up too much space in the car. Next time... if the antenna is this one https://www.dxengineering.com/parts/dxe-tw-2010-p then once closed it isn't too big ...
- Sat Apr 20, 2024 12:33 pm
- Forum: Questions & Advice
- Topic: EFHW/RW - Attaching wire to balun
- Replies: 15
- Views: 625
Re: EFHW/RW - Attaching wire to balun
Considering how easy it is to build https://vk6ysf.com/unun_9-1_v3.htm I think it won't be a problem building one of them as desired :) the "ground" goes to the counterpoise(s) or to ground stake, a small IP66 electrical junction box will host the toroid, the wire connectors and the coax o...
- Wed Apr 17, 2024 8:01 pm
- Forum: Field Kits and Reports
- Topic: Bring lots of different types of antennas, just in case
- Replies: 9
- Views: 564
Re: Bring lots of different types of antennas, just in case
the double t-bar may be unsuitable for some spots, but imVVHo will serve you well in all other cases when you can't set up an endfed wire