Sure sounds like the length of coax is part of the antenna matching.Especially true for an antenna without radials or a ground plane. So that extra length of coax between the radio and the SWR meterch

It would be a very very interesting experiment to measurethe velocity of Gravity Waves though materials with differentdielectric constants. I predict a Nobel Prize at least!

Most don’t know this and its been heavily downplayed but the implications are specific. We watched two stellar masses merge. The gravity detection array vibrated from the merger several seconds before

Jim: Have you ever seen the pickup loop in a Bird Wattmeter slug? Quite small, highly directional.

Wait until we get to UWB Ultra Wide Band antennas that have a good SWR from 400 MHz to 10,000 MHz!And of course, everything in between.

My network analyzer sure has a nice 50 Ohm match at the 3rd harmonic. And radiates well. That stub tuner on some versions, inductance on others, sure acts like a 1/8th wave element.

Not exactly. It was found some time ago that if you took a 3/4 wave antenna, which has major lobes in the vertical plane, but physically shorted it to 5/8's wave physical length, but kept it electrica

By adding Inductance and Capacitance to that coat hanger, you have made the coat hanger into a resonate system. You have me thinking of many VLF antenna systems where 1 or 2% efficiency is considered

Well, you do need just the right phase delay between elements to get the clean forward lobe.

Yagi's are very resonate. Now a beverage has more in common with a directional coupler than an antenna.

But it ain't a fraction of a wavelength element! Vivaldi antennas would fall into that family of antennas as well.

For an antenna, if it doesn't resonate, it really doesn't radiate! Ok, Ok, there is some minor leakage from a dummy load.

Hertz is a family name, with Cycles Per Second changed to Hertz many years ago inhonor of the work by Dr Hertz. So it's MHz kHz is kind of strange but K had already been the symbol for temp in Kelvins

Mini-Circuits makes quite a variety of small impedance transformers.I use the 50-75's all the time. Just pick one that has the right impedance ratio. In your case you want to bring 420 Ohms to 50 Ohms

Personally I find it a bit counterproductive to even think of putting a transmitter near a unit recording weak signals. If it transmits during a sweep, it will corrupt all the sweep data. This is NO f

More of an Ohm Meter question. Both an open and a short will read the same with a Nano looking at Return Loss.Might get some help from a Smith Chart.

Nearby transmitters can do that.

I have run that kind of power for 40 years though CATV hardline.75 Ohm coax.

Hi Dan I'm afraid it's a lot older than that!

I fully realize the deal would be complex, but he @$@%! his employees! I have worked with him on some designs several years ago. He is an intense micromanager.