Hello topbanders, I am a fairly new ham (I got licensed last year) and have only been active on 80 through 10m so far. I have been thinking about how to get onto 160m for quite a while now, and hope
I have modeled a "compact" spiral loaded vertical dipole for 160m, taking up a total amount of 6x6x17 meters space. It is vaguely inspired by the tak-tenna design (though I believe that has some sign
Your idea makes perfect sense. One thing to keep in mind is that having the point of maximum current lower on the antenna could result in higher ground losses. This makes it a tradeoff between maximi
This should not make a difference. Your signal is RF while the snow flakes transport charges that are discharged into your antenna once. Spikes of charge difference can be seen as a leading edge foll
You could try putting anti-parallel diodes across the antenna input, to short out any signals that exceed 0.7 V. Then again, chances are the radio already does that internally. -- All rights reversed
As a low power station with a simple double L antenna, this suits me fine. I get an opportunity to work those DX stations, before they high power guys pounce. That happens after I spot the station, w
That seems consistent with a half wave beverage having a really really high takeoff angle. Something on the order of 70 degrees, IIRC... *googles around* Ahhh, there is the web page with that info: h
You got my attention there. I want to build a K9AY array and maybe a 2-wire beverage at some point, so I would really like to know... Where can I find such relays? :) -- All rights reversed. ________
It is much more interesting than that. Different countries have access to different frequency segments in the 1800-2000 kHz range. Some countries have 1800-1850, others 1800-2000, still others 1830-1
On my old TS-930, I plan to use the transverter (XVTR) plug on the back of the radio to feed in the RX antenna separately. It has a place where the TX antenna's received signal goes out, and gets bac
Don't. A 4 square array is very useful for people without 200 foot antennas, and with space for radials. If you have exceedingly poor soil and more vertical space than radial space, an array of verti
If you like radials (and have space for them), you can load up your tower & mast as a vertical. If you have no real desire to put in radials and have a second support somewhere (say a 50' tall tree),
The double L antenna could be a stealthy alternative too, which does not require radials. It outperforms an inverted L with a smaller number of radials and comes pretty close to the performance of an
That's hard to imagine. A 1/2 wave vertical without any radials at all is only a few dB (2-6 depending on ground type and exact antenna shape) below that of a 1/4 wave vertical over totally perfect g
The main reason a receive loop is quieter than a vertical is that it blocks out noise from other directions. It does this by being directional. An unterminated loop has two narrow nulls off the sides
With the RX antenna a reasonable distance (>100ft) away from the TX antenna, would an RF limiter (like the one ICE makes) be an acceptable substitute for a front end protector with relays? I am runni
Is there more info available on this antenna? Especially a diagram (or crude drawing) of how things are done would be appreciated. A NEC model would be fantastic, but I'd be more than happy to prepar
Enlightening, but also somewhat misleading... The patterns in the ARRL Antenna Book are correct if the current in both elements is the same. However, if you feed an array of antennas with delay lines
I suspect that while models may be somewhat inaccurate sometimes (especially due to lack of things like trees and houses in the models), the modeling software will still give a good picture of the re
No. 160m is a very wide band, 200kHz at 2MHz is about 10%. This results in your wire antenna being quite reactive on a large part of the band. On one part of the band, the antenna will be inductive,