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Yeah I think you got proof that mirror mounts provide basically no RF grounding no matter what the multimeter shows. More bonding will help but ultimately it's what is right at the antenna feedpoint where the coax braid ends which makes the biggest difference. If you've got an antenna on the...

I've deleted the post because those instructions I read are nonsense and I can't work out whether the ropes are supposed to go to the next spreader along AS EVERY OTHER HEXBEAM DOES or they're supposed to go to the directly opposite spreader. If it's the second option I'm guessing that the...

No it doesn't. I used one for years before getting an auto tuner. It's a good idea to connect it to a ground bus bar if you're using a random end fed wire with no counterpoise but if you've a decent RF ground and are using a RF choke then neither the tuner, the rig or the amp need any additional...

The ALC. You're overdriving the audio input so the ALC is limiting it to try to do something to preserve a half clean signal that's mostly transmitting on the frequency you're tuned to. They won't notice any difference on the S meter at the other end because to gain a single S point requires a...

What do you mean by modified to fit? They need to be a specific length for each leg in order for it to work, you can't just go cutting it to fit.

I hope those posh plugs are Amphenol ones. They're the best by far. If it is Amphenol ones there won't be any loss because they're perfectly machined to spec so as long as your coax is to spec you'll feel the slightest of resistance as you insert to the coax into the plug. Any soldering is...

Why the reluctance to drill a hole in the roof? You won't see it stood on the ground, you won't get any rust - 8 years after putting one on my car I had no issues. If you use an antenna like a Sirio 5000 and the Sirio SO239 body mount they do it comes with a screw on plastic cap you can put on...

Always use a RF choke. The antenna system will decide whether to use the yagi as a ground plane or the mast or the coax depending on which it sees as the easier route for any RF current to flow down at the frequency you're on. We use a RF choke to ensure it isn't the coax with all the problems...

Nice, interesting. Thanks for doing it, work is stupid so no longer have the time to do it myself any more. Very little difference. Not sure what I was expecting but that wasn't it. Hmm...that'll give me something to ponder whilst i'm staring into darkness 400 miles a night.

But you're not using it as a stub though unless it's connected inline by a T piece and then whether the SWR is changed or not is determined by whether the unconnected end of the stub is open or shorted. If you're using a 1/4 wavelength of coax connecting the analyser to the antenna you should...

OK so to model typical installs here in Blighty make the antenna with the antenna feedpoint at 21ft. It will be fixed at this for all lengths. So we have the first mast which is the 21ft scaffolding pole, this will be in contact with the earth. 2" diameter. Next we have a 16.4ft pole which is...

And another perfectly working radio was sent to heaven due to the dumbass golden screwdriver brigade trying to make them run power they were never designed to with an increase that's barely going to get an extra S point to the other end, assuming of course that the extra power is actually going...

Does this image help you? This is the G3TXQ broadband hexbeam design wire arrangement. This is the classic hexbeam wire arrangement.

Its to try to address something that comes up often where you'll get two completely different opinions of an antenna and often the only real difference between the opinon of person A and B is the length of mast and the coax running from the antenna. W8JI also makes a note of this in one of his...

As it gets lower to the ground below a half wave the resonant frequency will fall due to increased ground losses. When you raise it up you'll probably find the resonant point of the antenna rises 100-200kHz. I always tune dipoles and beams a couple of hundred kHz low when doing it at any height...

It'll work but poorly compared to most other options because the flat plate of the mount will effectively be the sum total of the ground plane, regardless of however many straps you add. Mind you given you're getting a third of the distance with 150W than I manage with 4W I'm guessing what you...

Definitely this. Never understood unlocked clarifiers as all it results in is each side of the conversation chasing up and down several kHz if they both have it.

That's nothing to do with the audio chip rather it's to do with the setting of the ALC. and how much gain there is in the driver sections.

More like a typical UK installation using a metal mast attached to the side of a house with TK brackets, keeping the base of the antenna at roof height, the bottom of the mast not being in contact with the ground.

I'm loving reading this thread. It would be interesting to see the results with different mast lengths too but keeping the antenna feedpoint at a fixed height. 6ft, 16ft and 21ft are commonplace lengths that can be bought here in Blighty.