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Those Sirio magmounts have a long lived manufacturing fault. There is no strain relief on the coax inside the mount and nothing to stop it rotating and it is common for the braid to come detached from the brass tag on the inside of it due to the users either tugging on the coax to remove the...

Contest winning contester here., SWR makes you stupid. I never bothered trying to reach 1:1.0 and in fact I ran SWRs 10,20,30 or more times that at the antenna feedpoint using wire antennas multiband. Modelling my inverted L antenna fed by a SGC230 that was 85:1 SWR at its highest on one band...

Nice for lightning, no good for a RF ground.

It's perfectly feasible to do that with 4W, most often down to the lack of a RF ground and the coax radiating thanks to common mode RFI. It used to be a real issue here in the UK where over the air TV was the only thing available.

If you're putting them out horizontally and using four of them you'll need to use 1/4 wave length ones, partly to keep the feedpoint impedance and SWR happy. If you alter the angle then you will need to alter the length and achieve the same because if you don't you may not be able to get a low...

Where is your RF ground? It's literally the top surface of that box section of steel the mount is bolted into, that's it. You have none, regardless of what you measure with a DC multimeter - I bet if you were to connect to that antenna using an antenna analyser with a short bit of coax and see...

My Imax 2000 the other day....40MPH winds plus gusts. That's a 21ft long 2" diameter pole bending... You'll notice the ground plane kit. The box directly under the antenna is a RF choke which you can't see that well is made from a FT240-43 toroid and put in a nice plastic box. Really must make...

The RF ground plane is not grounded to the earth, the whole point of a RF ground is so the RF doesn't use the earth. The reason for that is that RF current flows better in radials/counterpoise which are a better conductor than the lossy earth and the more current that flows in the RF ground, the...

The two main choices I'd use... NUMBER ONE: 8 turns of RG58 on a FT240-61 toroid. You can put it in a small plastic box and solder sockets onto the end to make it look nice. This will give you by far the best choking on 11m. Second: 5 turns of RG213 or RG58, whichever you're using, on a...

It hasn't got 4.2dB gain. They'll all work pretty much the same. One with the radials wins.

No they're not, it's a channelised service. The only purpose of a clarifier is to allow you to adjust your receiver to compensate for a slight difference in frequency between the transmitting station and your receiver due to the fact that there are quite wide tolerances due to the fact CBs don't...

Not when you only have one pot to use. How they work taken from another forum because I can't be arsed to type it all out.... For RX clarifier read RIT. So locked means that the TX voltage is fixed/locked so the transmit frequency is locked to the channel frequency displayed, unlocked means...

Don't know it all, just a whole lot more than you do.

Whilst 10m so technically not 11m but as I was using a popular 11m export radio..... 4155 miles from UK to Hyderabad in India using 20W from a President Lincoln into a Hexbeam 32ft off the ground. Managed to make it through a pileup. Ignore the shouting, I got a bit excited....

Furthest local non-DX contact on CB about 60 miles with 4W. Was on a hill and both of us were mobile. On a CB..... 4155 miles from UK to Hyderabad in India using just 20W from a President Lincoln. On amateur radio..... 18,000 miles longpath from UK to China with 100W on 10m 6500 miles from UK...

Another dickhead running 50 times more power than they need into a shitty antenna install where there isn't enough bodywork on the entire vehicle to provide a sufficient ground plane, using coax which is nowhere near rated high enough power rating even with a perfect 1:1 SWR let a SWR anything...

You hear someone who sounds off to you so you adjust your clarifier. But that also alters your TX frequency so you now sound off to them. So they alter their clarifier so you sound right to them but that also alters their TX frequency so they now sound off to you again. So you adjust your...

I'm not sure why you expected to see a difference. You'll notice a difference on a run of a few hundred feet, maybe a S point over RG213, but for a typical home install you'll see nothing and for a mobile install or static mobile you've wasted your time and money. You'd have noticed no...

Modern trucks suck for installing antennas. Here in the UK it's been a problem for at least 20 years I can think of. The last trucks I drove where you could put an antenna on and have it work OK with no issues were in the 1990s before the move to fibreglass and composite plastic mouldings...

Rosin cored, can't be bothered with all that using separate flux. Have managed to avoid using it for over 3 decades.