Yes. A major disadvantage of stranded wire is that oxidation of each individual strand degrades the overall electrical properties of the wire over time. Obviously this is reduced by a good jacket, bu
Yes. I include these power supplies in the list of potentially bad boxes. Also, try using ferrite chokes to suppress radiation from the power supply leads. The trash on the power leads can originate
I wouldn't expect RF noise to be coupled to the radio via the radio's power port -- I would expect our radios to do decent RF filtering on it's own power input (or perhaps I live in wonderland). But
Faced with a similar problem, I've been spending lots of time with the ARRL Antenna Book. The later versions have some interesting thinking on the topic of wires, and the vertical radiation patterns
I do exactly the same. nlenet.net has had my websites and email for about 3 years, and I'm quite pleased with his service. It's in upstate NY, and is run by a guy who I know from the pro audio biz. H
This is not such a new story. I grew up in West Virginia within the shadow of three AM broadcast antennas, one of them a 4-tower array where I spent a summer silver-soldering a ground system. We were
On Fri, 08 Sep 2006 14:39:33 -0400, WA3GIN @ Arlington County, VA wrote: The Ironton Tribune is in Ironton, OH, across the Ohio River from Ashland, KY, and a few miles down river from Huntington, WV,
You're on the wrong list for this kind of question. Check out the RFI list, also on contesting.com. BUT: Since I'm an RFI guy and have wrestled with this kind of problem, here are several thoughts. F
On Mon, 11 Sep 2006 15:27:58 -0400, KC1DI quoted the entire bloody message to add two paragraphs. Bummer. But he made some excellent suggestions. I have several comments. First, I shouldn't even tell
Several comments. First, use TWISTED PAIR for all control cables and for power. This minimizes crosstalk/noise to control lines. Don't bother with shielded cable -- cable shields provide NO magnetic
Twisted pair cable DOES reduced noise coupling in unbalanced circuits. The fact that adjacent twists exposed to nearly the same field are out of polarity and cancel is a VERY significant factor, and
GFI's are a wonderful thing for safety, but it is quite common for them to have VERY poor RFI immunity. I've blown some up that were close to my antennas (20-30 ft) running QRO, and needed to do filt
A couple of years ago, there was a warehouse on the East Coast full of this stuff that was purchased by a cell wireless company who then proceeded to go belly up before they could use it. It got sold
Before you go to the trouble (and cost) of an inverter to get to 120V, check the power requirements of the DSL modem and the wireless gear that you're going to use. A lot of that stuff is 12VDC out o
This guy makes the loading coils that I'm using in three dipoles. I've got two dipoles up at two different QTH's using his LC16170 coils, and I'm preparing to build another one. The loading for my 16
Yes, but it can be made to work with a lot of top loading in the form of a capacity hat, and an effective counterpoise or radials. Will it be as good as a quarter wave? Of course not. But it will wor
Yes, that's been reprinted a number of times. BUT: "proper attention to radials" takes on a somewhat different meaning on 160 as compared to 40 meters. :)It's all in the ratio of the radiation resist
Study their data sheets. They re all on the internet! Jim K9YC _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contest
If you string a horizontal antenna between them, how high will it be? This is a VERY important question. Second, you should plug this information into a simulation program called HFTA, written by N6B
Three recommendations -- do all of them. 1. Bond ALL of the grounds together using connections of the lowest possible impedance at RF. Remember, the energy in lightning peaks broadly around 1 MHz. Al