Having a 160m inverted vee with the apex at 60' is like having a 10m inverted vee with the apex at 4'. It's a cloud burner. A 160m dipole at 100' is a LOW antenna. That said, there ARE high angle nig
Eric, what's the height of that tower, again? At first, I thought it might be FR1, the 2MW longwave station on 162KHz. But that's north of you, in Allouis, above Limoge. Have forwarded the URL to two
Eric, If the antenna is just off the E70, then I found it on Google Earth. 44deg 56m 59s North x 0 deg 11m 21s East sound about right? Interesting mystery. While I pour through international allocati
Eric....here's your answer, thanks to F8BPN Hi, I answered directly to Jim on his previous mail, before to read this one. This is France Info tower on 1.206 MHz. Eric, how long do you stay around Bor
Jan's link, http://perso.orange.fr/tvignaud/galerie/am/33bordeaux.htm , appears to be the antenna Eric saw. The buildings look like what I saw in his pics, and on Google Earth. F8BPN identifies it as
Since the tower is series fed with open wire 'coax', and we can't see any feed to the sloping wire, I'm inclined to think that the sloper is a reflector, and is broadened in cross section by the cage
Dear TT: The voltage gradient in a broadcast antenna ground field, in the event of a direct strike has been modelled, and confirmed by measurement as 1,000v/m. This was reported in BroadcastEngineeri
K5UJ's comments regarding the voyager are right on the money. I owned one...sold it, and bought it back. It works fairly well on 80 an 40. On 160, as Rob said, the 'radials' are extensions of the OCF
I had tuned out on the water tower-omni antenna lightning protection, and noticed the "porcupine" post. Things morphed somewhat, I see. To avoid forensic reading and proper attribution, let me say th
While it is true that you don't have to be faster than the bear, just faster than the next guy...sometimes you MAY find a bear intent on chasing things that run. One down, you're next. The variabilit
AM Broadcast antenna installations routinely use silver solder. Can't say there's never been a problem, but I haven't seen one reported. I can say that I've observed many tens of direct tower strikes
Tom, Not to be a complete contrarian, but the pic you posted could just as easily be two strikes, cloud to ground, more or less contemporaneous. Seems like a much more plausible explanation of the im
JC, TT: The answer to "how to bond them all together" is to run a peripheral strap around the house, and tie all grounds to that strap, at the point where they're available. Reliance upon internal wa
This could be as inflammatory as the lightning topic, and I sense we're getting wrapped around the axle. Having written several white papers on grounding and shielding in instrumentation, and having
Regarding single ended or voltage fed antennas, and 'tuned grounds': Unless you are absolutely committed to sitting in the middle of your bloody antenna, and ignoring RF exposure safety requirements,
Here we go again... so which is it? Inverted L's have plenty of bandwidth or Inverted L's little bandwidth??? -0- The answer is... the perceived bandwidth of an Inv. Ell, or a full sized vertical, fo
Paul, What I would do is put a thrust bearing where the rotor normally would be located, allowing a mast of 10' or so to extend below it. THEN, I would use thinwall irrigation pipe as a 'torque tube'
Electricians "pug seal" is a clay like material used to plug holes around service entrances and ground wires. Costs 2 bucks at your local hardware store. Goes a long way. It also stays reasonably fle
TT: I have a friend who is looking for an MA550 w/ marb in good shape on the east coast. He will need to move it to Oswego NY. If you know of one, msg me privately, please. Jim n2ea@arrl.org ________
At our place in MD, the ospreys were pretty settled on the DNR nesting poles in the creek. There were smaller birds that tended to land on convenient places on the sailboat, and crap things up. Dangl