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But your receiver is at 27MHz so it won't hear 400Hz. It hears ignition noise because spark gap transmissions are extremely broad banded which is why spark gap transmitters like the Titanic used are banned worldwide.

No it isn't. It works as a multi-band antenna because of significant losses both in the matching section and your coax outside the 10/11m band. Traps in antennas like the Hustler BTV series have very low loss ,hundredths of a dB.

Using a larger diameter wire up the middle of it would make it more broadband without impacting efficiency. So if they chose to use braid instead of the thin solid wire that the Imax and A99 use that would make it more broadbanded on the band it's designed to work on. Multi-band coverage...

Wife's heatgun she uses for doing signage. She's had it donkeys years and the mains cable just gave up where it went into the plug after 20 years of flexing. She was going to buy a new one and I told her in no uncertain terms was she going to waste money and contribute to electronic waste and...

Not really much need to translate. You can translate Youtube to some extent by turning on Close Captions then clicking the settings icon next to it and selecting translate to English. It's an end-fed antenna with a decent set of radials and two morons who don't know what the hell they're doing...

Home made dipole will beat everything else for DX but be poor for local contacts. I'd put up something like the A99 for local contacts and use the pole it's mounted on as a support for the centre of a dipole configured as an inverted V.

On AM if the dead key is higher than 25% of the peak power output you'll get negative swing.

How old is the TV antenna coax? It typically has a lifespan of around a decade but here in the UK it's not uncommon for houses to have cable that's 20-30 years old and the first people know of an issue is when water is coming out of the cable at the TV end.

Look at Rigol oscilloscopes and spectrum analyser. With their oscilliscopes you can buy the entry level one and using a software hack unlock it to the top end 200MHz with all features as their entire range of scopes are the same but just software locked to whatever version. Their Spectrum...

Christ they look terrible compared to the Breedlove ones. Got to drill 6 holes instead of one so 5 times more chances of cocking it up and 5 more points for water to possibly get in. And having the bolt heads sticking out on the top of the plate..... I'd much rather have the far more pleasant...

Because of the time base they've chosen on the oscilloscope and the frequency of the waveform being measured. If you go learn how oscilloscopes work then it'll become clear what is going on. If you alter the time base from what they've chosen you'll end up showing more full waveforms but they'll...

If anything needs to be done it's to improve your existing installation a little would to be to improve that balun. How have you constructed it? An air wound RF choke made from coiling the coax is a tuned circuit, the frequency it works on dependent on the number of turns and diameter of it and...

None because it's all bullshit. There is only one correct length, the length required to get from A to B by the route you wish to take. However if you're co-phasing then yes it's critical. You need to know the velocity factor of the coax for a start as that alters the length. Coax typically...

You will notice zero difference between 1:1 and even 1.5:1. Some things are just not worth chasing. Notice you have it mounted on the driver's mirror which I find mildly amusing given your comment about the SWR. From an antenna point of view mirror mounting provides a very poor RF ground which...

Good old antenna theory and testing shows that in any direction there are no radials there is a -6dB difference to the direction there are. So if you only had radials north and south you'd find signals to the east and west being about 6dB or 2 S points weaker. For DXing the proximity of the...

Your antenna may be hooked up to a metal fence but that's not really a RF ground. Get four lengths of wire about 9ft long, attach them to each side of the mount and stake the other ends to the ground. See how that goes. You'll probably need to retune the antenna.

What difference do you think they'll make given how small and pathetic they usually are? They're literally there to keep the EMC compliance people happy, they're literally of no use for stopping power wire borne interference. Much better to get a large snap on 31 or ideally 43 mix ferrite and...

I doubt you'd notice it on the S meter as it's not even half a S point.

For CB radio unless you're running a ridiculously long feedline or stupid power more than a few hundred watts it doesn't really matter a toss what you use as you'll struggle to notice the difference on the S meter between RG58 and LMR 400 for a typical run in a home installation and in a mobile...

That UR6QW audio sounds absolutely bloody horrific, it's over-driven with the compression wound up too high or it's over-driving the radio. That is far from what communications audio should sound like. Here's what you want to be aiming for....and yes you can achieve it on SSB too.