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I was thinking about a video I watched a few days ago and whilst messing with models found an oddity. Which was also confirmed in a subsequent video. It seems a full wave dipole has a great pattern yet an end fed has a horrendous pattern.... I think the saying is...... Wassup ? I thought there...

In an ATU (AMU) we have caps and coils, same with many antennas that need a coil or an L match. In some of the worst matches that people use an ATU for what can be the ranges of internal coil losses in dB ? As an example of a very inefficient match I have a 160m band antenna 11m of vertical...

Interested to know what facilities and specifications are of greatest importance and why. Thanks. I am not planning on operating contests myself but I am guessing that there must be some extra high performance requirements that are an advantage.... and that would also be helpful for a normal...

Casually thinking about a second radio here, maybe anyway... and this springs to mind. I love how it looks and is has the nice Yeasu features, triple conversion and the 3kHz roofing filters. Anyone experienced using one.. am interested in your thoughts. I have a 7300 but quite like the idea of...

Is it normal to have S3-S7 of bleed on your frequency of choice ? Either distorted garbled deep low ...wuw wuw wuw wuw or a high thin reedy harsh bleed ? This is what I get ALL the time when I DX (20m)..... 1/2 wave vertical, basically lossless run of coax : "Filt 1" no changes on the TWIN...

I am going through a few things in my mind here.. I am making a fast deploy (wire) 5/8 wave antenna.. coil loaded for 10m band. I am trying to work out what the compromises might be from having either 32 very thin wire x 1/4 wave radials laying on the ground versus elevating the feed point by...

Other than getting a good clean shiny solder joint between pin and coax core is there any specific quantity of solder that should be used ? (I of course always do a continuity test with a multi-meter afterwards) Back in the day someone said don't use more solder than you need to .. i.e. don't...

this was once shared to me on this forum and I find it a great article. There are many good people here who know a lot about antennas and propagation and I found this article fascinating. https://www.arrl.org/files/file/antplnr.pdf I find it quite difficult to imagine radio waves bouncing of...

Trying to work out some figures... ERP is RF power + antenna gain I think... If an antenna receives 5 Watts of RF energy with 3dB of antenna gain we get 10w. How does height gain work ? Say an average antenna is at at 10m from ground goes to 20m on a pole I understand this gives 6dB gain. So...

Following on from copper vs steel.. I have seen a few antennas with silver plated copper wire. I imagine this will make zero difference to signal going in and out. Any thoughts ? I have seen the words "greater efficiency" and "stronger signal" in various commercial antenna descriptions.

I mirror mount, when I use a whip, through hole is impossible on my vehicle. Any technical info to suggest that self made ground planes attached to my mirror mount bracket with strong crocodile clips close to feed point will broadly increase antenna efficiency ? (extra counterpoise for it to...

Anyone know if saturated with rain soil (dirt) increases or reduces ground losses ? Thanks

I have installed a centre loaded 1.7 M whip (mirror mount with earth bonded panel, metal to metal wet and dry sandpapered for best metal contact, ugly balun/choke 5 turns 4.25 inch Super8 coax just below feed point) in the UK, it is somewhat of a classic. A Super Modulator II, originally...