I really DO have 80m verticals that are 1/2 wave apart. (incidentally I share the radial fields with the 160m antennas which are 1/4 wave apart) So the question remains, how to properly feed phased v
Also the difference between Mix 31 and 43 is not great and was used for decades successfully before 31 was introduced. For a non-critical application like this almost anything would work with enough
I saw a few items in a Google search where guys had converted their full-size G5RV into a T antenna on 160m. It had something to do with adding the obligatory counterpoise and shorting the feedline.
Absolutely! And bond the shield to ground on both sides of the choke. I totally disagree with that advice. 1.) If the feedline is bonded to the same ground on both sides of the choke, any choke would
On paper I agree but what about real world? Topbanders seemed to do quite well with the old 43 mix and the resultant lower impedance. How much is good enough? That's a good point. It seems we tend to
Um -- what did you say was the typical skin depth of soil at 2 MHz? Somehow, I seriously doubt it was down that far. :) Common mode suppression requirements depend on things: 1.) The sensitivity of t
Replace existing #43 stuff that's working? No way. Do any NEW #43 stuff for low bands? No to that also. The proper mix is dependent on many things, not just net impedance. We have to consider core st
It is often mentioned that "very high RF voltages" are present at ends of dipoles, voltage nodes on loops, etc. but I haven't been able to find any guidance in the form of numbers. How high is "very
1. Four relay switched vertical wires at the center bottom voltage node. The antenna has about a 25 KHz 2:1 bandwidth so a "binary" ladder of 4 wires can cover the whole band if the natural loop is r
Now we just went through the deepest solar min in our lifetimes - which also means we were hit with more GCRs than ever in our recorded history (about 19% more than anything we've seen in the past 50
ON4UN states in his book that the wires for a 2 wire reversible beverage must be installed side by side, but also may be placed one above the other with satisfactory results. Did someone try this? Ho
So, how to measure the bev? Is this procedure correct: The bev is ~8 feet above ground. The far end is open, not grounded, no resistor. The analyzer connects directly to the bev and the ground rod at
The sloper loads fine all the way up to 1500 watts. The inverted L loads just fine to about 700 watts and then causes the Alpha amp to fault out. I think I am getting a sudden change in antenna imped
Remove the balun. It's not doing anything for your and is a potential source of loss and problems. Coaxial cable is unbalanced, as is a ground-fed inverted L. No need for a balun. >>> Unfortunately,
** Ive noticed no difference in any weather using field phone wire which happens to be in wide use by many very competitive contesters and lowband DXers. With 5 2 wire reversibles here and 750' of 1/
Tom: MOST antennas are in a "neither" world of being neither perfectly balanced nor perfectly unbalanced. How about an inverted L longer than 1/4 wave but optimized with series capacitor? Any closer
This is very convenient for me. Can I just put up two of these side by side a foot apart and have a differential impedance of around 600 ohms? A two-wire Beverage operates in two modes, common mode (
With an Amphenol Type "HN" connector there is never any flashover. SO-239's did not cut it. Type "N" is even worse. A UHF connector won't flash over at 1500 watts if the VSWR is low. Dave WX7G HVN co
Come on Carl! You're just being provocative. Someone may take that seriously. You know very well that only the physical length matters for narrowing the lobe. Bob VE7BS Hi Bob, You have the right ide
Speaking of which... how do running stations monitor/switch between receive antennas on 160? Some may have them fed to diversity reception (left ear and right ear) but my primitive setup just has a f