Several things here...since you are looking for comparison numbers. IF one has a calibrated S-meter (can now actually be done with a K3 with latest firmware and utility), S9 is 50 uv into 50 ohms, wh
I use sections of RG6 to remote the AIM4170, principally to tune parasitic devices in place. One caution doing that is to put a good common mode choke at the remote end, and recalibrate the remote wi
The amount of RF energy absorbed by a supporting or nearby tree is controversial. There is no accepted defining work on the RF loss effects of forest around a vertical, and some minor work was unable
The antenna depicted on W5JGV's web page is a RX antenna setup and is apparently also for low MF. Though the owner might be quite satisfied with the "performance", if the premise was that trees are l
One of the essential accomplishments of a dense radial system is to shield the vertical section E-field radiation from an otherwise quite penetrable and lossy ground in the fairly close area around t
That's the real gorilla in the room, notable by its absence. Also note that the author of the web page was using it for RX below 1 Mhz. Didn't say a thing about breaking a pileup on 160 with it. My s
Would working EU on the first try be worth moving east away from the rain forest? _______________________________________________ 160 meters is a serious band, it should be treated with respect. - TF
What may be of more effect is the seasonal effect that forestation has on the water content of the ground by roots passing water on to the leaves for evaporation. The cooling effect of this evaporati
Since my K3 now has a firmware device to calibrate the s-meter and rf gain so that the S units are factual, I've been sending Sn for signal reports out of the noise outside of contests. S3 is 36 db b
Can you supply some details about how you had the inv L suspended originally (supended from tower? distance from tower? etc) and same info for the new setup? 73, Guy. ________________________________
Where is your T bottom with respect to the tower, how many and kind of radials do you have below the T, is there a direct connection to the tower, and does the tower base have radials? Guy. _________
Several things... The tower and any feedlines are in play. The tower should be connected to the radials. This would be an issue whether the vertical antenna was an L, a T, or a folded monopole. This
Model the source as close as you can to where you intend to feed the coax. In the model, do **NOT** use the model ground as the low part of the shunt connection, use a third wire. If you want an exte
All the reading and discussions I have over the preceding 6 years suggest In going up the tower to various conductors, the current tends to pick the LONGEST conductor path "near" the top for the grea
An inverted 'L' has been strung up a tree at my QTH, with a 65 foot ** questions below - please answer: 1) what are the dimensions of the top and the bottom of the C. 2) what is the compass orientati
Physics doesn't much care whether we are rich or penniless, and being a religiously pro-radial bigot or anti-copper enthusiast does not change the simple physics of the matter. It is what it is. A s
As far as I can tell with this and other such reports, including the benchmark 1937 work, all the measurements were made at ground level, and would therefore not measure skywave. The ground level me
I partly agree. There is an aspect of "good enough" on an anecdotal basis. But for circuit components we have completely reliable ohms law and formulas, etc, and for antennas not seriously deprecated
There is a great deal of positive anecdotal evidence for a vertical over an impenetrable ground shield. This would include corrugated metal roofing, copper or metal roofs, chicken wire for as long as
The general behavior for bent antennas less than a halfwave is that there is a *mild* advantage in the direction opposite the bend versus the direction with the bend, e.g, if the wire goes up and ben