Hello All, I have moved to new qth and start to plan my 160/80 meter vertical antenna. I was reading in ON4UN LOW Band DXing book about coax and loss. John claims he is using 5/8 hardline coax for hi
I used to have a 1000 foot long open wire line using 4AWG stranded insulated aluminum wire with an impedance of 450 ohms. At the time, the wire cost $0.15 per foot. I think 4AWG was the smallest size
Shouldnt that line be rotated along its length to maintain balance as done with OWL Beverages? Carl KM1H I used to have a 1000 foot long open wire line using 4AWG stranded insulated aluminum wire wit
Carl KM1H A big vertical is omni directional and has high signal levels. This is in contrast to the beverage which has low signal levels and tries to null out certain directions. If I disconnect the
Carl KM1H A big vertical is omni directional and has high signal levels. This is in contrast to the beverage which has low signal levels and tries to null out certain directions. If I disconnect the
?? A big vertical is omni directional and has high signal levels. This is in contrast to the beverage which has low signal levels and tries to null out certain directions. If I disconnect the vertica
I use 9 gauge Al electric fencing wire for elevated radials among my trees. It is pretty tough stuff, as 3" branches have fallen on it without anything but a little stretch. it doesn't stretch much w
Hardline for 160 meters? I've mostly used hardline where I really needed it, like back when I was doing weak signal work on the low end of 144 MHz. Is 75 ohm CATV-type RG-6 (F-6) coax available where
Only in an advertising brochure for the RG-6. On 160M, loss is all due to copper, and there's LOT more copper in RG213 than in any RG6 cables I've seen. Remember -- the question was about 1,000 ft. A
You're right about the loss being all in the copper center conductor, Jim. I based that statement on a graph that Owen Duffy had on the old vk1od.netsite for solid center conductor. Perhaps I looked
A calibrated dummy load wattmeter at the far end of the cable can be a real eye opener. Power loss distributed 1000 feet would not result in much warming. 73 Bruce-K1FZ www.qsl.net/k1fz/pennantnotes.
AND in the shield. One of the things that gives bigger coax lower loss is that skin effect has the greater diameter of the shield to work with. It's important to realize that "RG6" and "RG213" are no
Hardline doesnt get chewed Mike; I run 750' of 1/2" CATV on the ground to the Beverage hub. That was after flooded RG-11 and RG-6 got destroyed during a few winter months when the critters were hungr
Heating is not a good guide for long coax runs. One watt of heating, in one foot of length, would hardly be detectable. Multiply times 1000 feet and a kilowatt of power is lost. The same logic not to
Bigger is most times Better. Especially when Big is the correct value. For my 160 Meter, 1/4 WL vertical, which is more than 400 feet from my operating position, I use 1/2" CATV hardline X 2. Since t
The calculated loss is a mere 0.2%. The proof is in the pudding. It 73 de Milt, N5IA 0.2% is only 0.01 dB, that can't be right. Maybe you meant 0.2 dB. The ARRL Antenna Handbook shows about 0.4 dB f
You are correct, Rick. I meant 0.2 dB. Brain not too well in gear this AM. Thanks for the correction, so no one is mislead. 73 de Milt, N5IA The calculated loss is a mere 0.2%. The proof is in the pu
I suspect they are talking about 75 ohm heliax, not the typical CATV hard line. The CATV hard line I've seen has an Al shield, so I would expect loss to be a bit greater than heliax, which has a much
I suspect they are talking about 75 ohm heliax, not the typical CATV hard line. The CATV hard line I've seen has an Al shield, so I would expect loss to be a bit greater than heliax, which has a much
The 3/4" chart is well below .1 dB at 2 mHz and doesnt show on the chart until 5MHz at .11dB/100' and .26dB at 30 MHz. Thanks, Carl. Makes sense. 73, Jim K9YC _________________ Topband Reflector Arch