my two halves 90-degrees relative to one another...? I modeled it with 4NEC2 and it looks like the radiation at 90 degrees straight up is about -10 degrees compared to the main lobe. If the top wire
Murphy strikes again. What I meant to say was "the radiation at 90 degrees straight up is down about 10 DB compared to the main lobe." not 10 DEGREES. Sorry. 73, good luck in the contest, Rick K2XT
Agway (farm supply store in NJ) this week had 1/2 mile of #17 aluminum electric fence wire for $40, which is about 1.5 cents/foot. With tax that comes out to $2.06 per quarter wave 160 meter radial.
According to my calculations at 2 MHz: If the capacitor in series with the line inside the Polyphasor was .01 uf it would have a reactance of 8 ohms and the phase shift would be 9.15 degrees. If it w
Ok we have agreement all around. Thanks Price for the data. Now we know we have .02 in series with 50 ohms, so that is about 4 ohms of reactance and 4 ohms in series with 50 ohms results in a phase s
The subject of lightning protectors on the 4 square system that has been going on today (some great work, Guys) has me wondering about the design of them. A Polyphasor lightning protector has a block
It doesn't Jim. There are only 2 components in the VHF arrestor, a chip capacitor and a gas tube. I opened up one today and looked. Rick K2XT ________________________________________________________
John, SWR is not the best criterion for determining the optimum number of radials. In fact if your impedance is 50ohms and no reactance you still have a lot of ground losses. I have a very similar an
Lars, Run the simulation with other types of grounds. I think you are right so far. When you run it with salt water you will see the vertical angle right down next to the horizon, but with real groun
Brad, how do you know? How do you (anyone, for that matter) know how well the antenna works? Just for kicks, let's say somehow we KNEW the antenna didn't work well. Say someone (to play a prank on yo
It would seem a gas tube would probably solve that problem. Gas tubes can be had for in the $3-4 range, and are available from Mouser. In the dormant state they have less than 1 pf capacitance, so th
Last winter I had some free time on my hands and I did some reading about the transatlantic tests, and then researched through many QSTs of the period to see when modern versions of antennas were di
Paul, There's still some discrepancy here. I have the Radio Club of America commemorative publication on the 1921 tests. In it Amy and Burghard describe the station antenna: "As soon as the antenna a
Congratulations to all who have been making comments on the antennas last few days. It is refreshing to see such intelligent, well thought out and respectful discussions. I read many of the reflector
I had a similar problem with noise killing topband and 80 meters. It was also originating at a transformer. Direction finding using a 2 ft loop (which worked FB on AM broadcast band so I know it was
My XYL is from LZ land. I've been there twice. We send mail there all the time, and I can tell you this much - if the mail looks like it contains something of value, and the mail is not insured (requ
Brad - You've gotten some good info here so far. I have similar problems here about every two years. My last one lasted over a year and I spent a lot of time arguing with the power company and also a
Sounds like "maybe" something is not working. If you have an antenna analyzer can you do a sweep from 160 up to 40 m? There should be a relatively flat SWR over the whole range. Without the far end t
capability, etc. fully capable of handling the worst pileups. Since John mentioned the W1BB era in the same paragraph, I assumed by "world class radios" he simply meant rigs NOT of the W1BB era. In o
I see N6RK has addressed this statement in his response as well, but I would like to add that this kind of statement is often heard on the air, "That antenna of yours there is doing a FB job for you.