Search found 136 matches
- Sun Apr 28, 2024 8:00 am
- Forum: Questions & Advice
- Topic: RG-174 or RG-316
- Replies: 6
- Views: 164
Re: RG-174 or RG-316
I was asking the OP... anyhow, 20ft of RG174 at 10MHz will have a loss of 0.6dB where the same lenght of the "humble" RG-58 will show a loss of 0.2dB not significative, sure, but when it comes to QRP/QRPp it's always a good idea reducing losses as much as possible, and then we don't know w...
- Sat Apr 27, 2024 7:27 pm
- Forum: Questions & Advice
- Topic: RG-174 or RG-316
- Replies: 6
- Views: 164
Re: RG-174 or RG-316
so... what's your pick, and why ?
- Sat Apr 27, 2024 1:12 pm
- Forum: Questions & Advice
- Topic: EFHW/RW - Attaching wire to balun
- Replies: 15
- Views: 663
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 with the help of an antenna matching unit by the way
- Sat Apr 27, 2024 11:43 am
- Forum: Questions & Advice
- Topic: EFHW/RW - Attaching wire to balun
- Replies: 15
- Views: 663
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: 6
- Views: 164
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: 663
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: 663
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: 570
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: 663
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: 570
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 ...