I need this lots of knobs. And quesionsI will buy as soon as funds become available,thank you.
Wrong bj showed me the right way works good nowThat depends on how you connected the ladder line to your receiver. How did you do that?
If that is true, then something is wrong with the way you did your Doublet. The Doublet if correctly done should have much greater "capture area" than the CB antenna on most shortwave bands.
Lafayette HE-80
General Coverage Shortwave Communications Receiver
(1964)
http://www.noobowsystems.org/restorations/he-80/he-80-en.html
https://www.ecrater.com/p/14787374/lafayette-he80-he-80-receiver-service
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Ladder line connects Here
Carbon fiber does conduct electricity. It is not as good of a conductor as most metals, but if you build a structure with it, you will find that its electrical conduction can easily contribute to galvanic corrosion, by electrically connecting dissimilar metals. Or wet environment galvanic current carrying.
Carbon fiber is NOT an insulator!
I used two pieces of coax, centers to the screws. The shield soldered at both ends. I am hearing a lot more than I was.what do i do?WRONG!! That antenna connector is UNBALANCED whereas ladder line is BALANCED. The antenna connector is labelled A and E. The A means ANTENNA and the E means EARTH aka GROUND. Connecting ladderline here grounds one side of the ladderline and antenna. NOT what you want to do.
I like the yoke, but the crimp connectors make me think about the lights on my trailer. I got tired of redoing the connectors because of exposure to the elements. I now use dielectric silicone grease and squirt it into the connectors before I insert the wire. Just my 2 cents.
The standoffs should be PVC/fiberglass etc. something NON-conductive and should not touch any metal.
Sir,
I doubt if you see any antenna a wavelength long with 20dB gain ?
[Now, you see I had some "sarcasme" above, thats because i know you are a frequent writer, (no harm ment, but you know a lot...).
I have seen a grain storage bin that was loaded up produce great results as well. It's all about band conditions as well as antenna.Try modelling them. In my case the antenna was an 85ft long inverted L being used on 20m band and it performed with lobes and nulls exactly as the modelling software illustrated. Modelling it for the 10m band showed even more lobes and nulls.
Several years ago I used to be into contesting. I have a wall of first place certificates for CQ-WW, CQ-WPX, ARRL International DX, IARU HF and even a first in world in class in CQ-WPX-RTTY. Even though I was only running 100W my entries would be in the top 20% of all entries, regularly beating those running 1.5kW into antenna farms. My antennas? Up to 2015, a Cobwebb and an inverted L which I used to adjust the length of to get that 20dB gain you claim doesn't exist. In 2012 in the CQ-WW contest I did a 10m only low power entry using that long wire and worked 91 countries in 16hrs that weekend, getting 1st place in England, 25th in Europe, 57th in World.
So how did I manage this feat? Lots and lots of hours learning about antennas, learning modelling, building and testing what I modelled going through hundreds of feet of wire.
Did you use a siloading coil? (Sorry.)I have seen a grain storage bin that was loaded up produce great results as well. It's all about band conditions as well as antenna.
Try modelling them. In my case the antenna was an 85ft long inverted L being used on 20m band and it performed with lobes and nulls exactly as the modelling software illustrated. Modelling it for the 10m band showed even more lobes and nulls.