First verify that the fault is with the antenna, not the preamp or radio. BTW, a preamp should not be necessary with the loop I wrote about, but many people think they need a preamp ("it can't hurt")
In any event, C per foot has nothing to do with Q. That is determined by the outer diameter of the coax, and its loss properties. Large diameter aluminum hardline will clearly have a Q potentially se
Dielectric loss of polyethylene coax at HF is negligible. A lower dielectric constant does reduce conductor losses, so lower capacitance corresponds to lower losses, but only if the construction is
A 1/2 wave vertical over perfect ground has a theoretical gain of something like 2 or 3 dB over a 1/4 wave vertical. If we accept that the 1/2 wave vertical will have more losses, it is still that ca
Nonsense. For research purposes, just put up a balloon vertical on a calm day in some remote area. Set up a transmit source a mile away and compare received signal strength vs height. Temporarily rol
You want to OPEN the inverted L to take it out of play during receive. Having said that, the pattern of the loop could still be distorted. I know that a loop doesn't work well near my 40/80 meter inv
What you explained is a common misconception. Folding an antenna doesn't change the radiation resistance, it just scales the drive impedance by a factor of 4, including any ground resistance. It is t
It seems to me that the folded counterpoise is equivalent to a couple of loaded short radials, except that "linear loading" is used instead of lumping loading coils. Thus the ground induction loss is
Your analysis IMHO doesn't take into account coupling between the two conductors in the open wire line. I would characterize the above as a 33 foot radial in series with two 33 foot shorted stubs. A
If you are selecting only one beverage at a time with relays, then you can use a common ground for them, because the unused one doesn't create any current in the ground. I have been doing this for ye
The biggest problem with working slow speed stations in the ARRL 160 is that I leave the frequency "unattended" for too long, and risk having an east coast station fire up his CQ machine. To mitigate
There is an "advertisement" on the ARRL web site for the 160 meter contest at: http://www.arrl.org/news/reach-for-the-top-in-the-arrl-160-meter-contest Unfortunately, it states the KL7, KH6, etc coun
I'm not a little gun, but you are absolutely correct. The thing to do is answer about 50 Hz above or below zero beat. I have been doing this for years. Just enough to allow the running station to dis
There must be a lot of variation. I used to have a turntable that never sounded quite right to me, but I could never put my finger on what was wrong with it. One day, I had an opportunity to A/B it w
K7KU was incredibly strong here in CA. Was he strong in the east too? Rick N6RK _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
That's interesting, because of an argument presented on the reflector a while ago that the W to VK path seemed to work fine regardless of sunspots, but that path is trans-equatorial. Rick N6RK ______
I haven't built this system, but the suggestions above make sense. I have been trying to encourage using transformers instead of baluns on 160 meters for years, but it's a tough sell to overcome the
In the example above, the load impedance is only 12 ohms. For my OWL, the load impedance is 450 ohms. The line is not connected directly to the vertical, which has more than 12 ohms of impedance anyw
And also your location, especially if it conflicts with the number in your callsign, or you are selling a tower, etc. Rick N6RK Galt, CA _______________________________________________ UR RST IS ...
I don't agree with this generalization. I have built many legal limit transformers and baluns with ferrite, and have not had overheating problems. Of course it is necessary to use the correct type of