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WHAT??? All that power being lost???? Seriously, a 2:1 SWR will only loose 11.1% of the power.? So a 100 watt station will give you 88.9 watts of ERP (Less cable loss and plus antenna

My.....my........ For heaven's sake......! What concerns about a meager 2:1 SWR!! Just go with it, get on the air, and enjoy. Dave - W?LEV [email protected]> wrote:

For Barry K3EUI "Also, just adding an inductor will not automatically increase the impedance. Depending in the initial antenna impedance, it may go up or down." I should have said that just adding

Hi Bill WA2WIO, Your antenna geometry and dimensions can be adjusted to achieve a wide range of feedpoint impedances for a specific frequency. Once the shape and dimensions are set, the complex

Hi Barry K3EUI You and others make an excellent point about the practical acceptability of of a 2:1 SWR. I agree that for the casual ham using commonly available equipment, it's probably not a big

its just several dipoles in parallel on the higher bands fed on the gap (almost similar to a fan dipole) except on 10m where it is 3 quarterwave ... on 40m it is a quarterwave against bent radial

Where in the H4 source code are MS5351m vs Si5351 configuration adjusted?

To measure the loss/gain of an antenna, both in transmission and reception, you will have to do it by comparing it with another one. For this, a field strength meter will be useful; the nanoVNA is a

One of these was the "Clarke Calculator" invented by Edith Clarke: https://spectrum.ieee.org/edith-clarke-modern-power-distribution She also designed the turbine system for the Hoover Dam. 73, Don

Since I am on Windows Seven, I use nanovna-saver 0.3.8. My NanoVNA is DEEPELEC NanoVNA-F 4.3" HW2.3 HW3.1 Firmware 1.05 (Oct 31, 2022) I observe: 1/ To succeed, every time, the NanoVNA <-> PC

Check SI5351 generator I2C bus exchange

One problem with calculations at audio frequencies is that most transmission lines exhibit complex characteristic impedances below around 300 kHz or thereabouts. Telephone cable pairs, if untreated

You don't often see Smith charts at audio frequencies because transmission-line techniques are less common, as is complex impedance matching in general. No reason why they couldn't be supported, of

The major claim to fame of this type of antenna is not "gain" or "directivity", but coverage of all the amateur HF bands with one antenna with a single feedline. It is a compromise to accomplish that

Try 1.2.42 Installed today, works fine (exc. wonky conn. to touch screen), great instructions here: https://github.com/DiSlord/NanoVNA-D/blob/master/README.md -- I_B_Nbridgema

That's actually the main purpose of calibrating a VNA, to remove everything from the measurement except the DUT. 73, -de James/AC0CW [email protected]> wrote:

Oops! Those who might want it, get it while you can - or else you will have to ask the Wayback Machine. More and more creators of well-known software are retiring. Many of them go the extra mile when

Yes; in fact I had to do this to calibrate measurements made on a 1296 MHz bias tee using microstrip transmission lines. Zack

Yes. Instead of doing the OSL calibration at the unit, do the same at the end of the coaxial feedline. Outside of a bit of loss due to the coax, then your measurement plane will be at the end of the

Is it a viable method to do calibration of the VNA with a transmission line attached, so that when the DUT is attached to end of that line the measurements are true measurements of just the DUT?