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Thankyou Kent, from someone who can still use a Leacher Line :-) 73 de GK8NXD

OK, for the youngsters in the group a bit of history. It's over 100 years ago.Coax has not been invented yet.There are no SWR metersThere are no VNA's.? ?(Well, an RF Bridge and a lot of math will

On Wednesday, August 10, 2022, 12:30:34 PM EDT, Russ <u.rusty@...> wrote: VSWR is a *MEASURED* voltage difference along the transmission line. Yes.

The NanoVNA-F is not an open source design. The manufacturer does not publish schematics or source code for this product. Roger

VSWR Voltage Standing Wave Ratio The cause is the impedance mismatch. The measurement is in volts.??? Kent

So, you are saying that VSWR is based on voltage, but caused by an impedance mismatch.

It's not just US broadcasting stations that are like that, in France too. I did part of my out-of-school internship at a station that was broadcasting 300 kW on 600 kHz 150kW on 890kHz All in AM,

You are all missing the message, Resonance has no effect on antenna performance so it’s not a concern if an antenna is resonant or not. I don’t think I ever saw an US AM broadcast antenna that was

I thought, at one time, that by not using the antenna at resonance (zero reactive) the bandwidth of the antenna would be widened. After adaptation (filter in 'L'), I note, by calculation, that it is

Would you have the same for my nanovna-F I don't understand anything in github to treat this myself. -- F1AMM Fran?ois

What one wants to avoid (with some transmitters) is too much reactive component - sure, you can cancel it with a passive component, but that component will have some loss AND the required value

Many collinear arrays are also high-Z. That quoted statement from ARRL is a gross over simplification! Dipoles, Yagis, yes. But there are many common radiating structures that do not offer low-Z to

"Dave W6OQ via groups.io" <david.hostetler@...> wrote: Resonance could be a paralell resonance, as with a full wave dipole, which is high impedance. -- Brian D G3VGZ G8AOE G3T IO94im

Exactly! But not just amateurs, everyone!

Thanks, but still a problem. Wouldn’t download with Chrome, but as advised I used Edge. Initially said it wouldn’t download because of malware risk, but ignored that and downloaded. When clicked

You should be drawing current when the NanoVNA is off if the battery needs charging. The battery has a protection circuit in it to prevent over and undercharge. Perhaps that has failed. You can see it

thank you martin n6qlh [email protected]> wrote:

From ARRL antenna book many editions: Resonance has no effect on antenna performance. The only reason amateurs like to operate an antenna at or NEAR resonance is because the feed point impedance is

Hi Martin, I do not use any Malware protection on my iPads, but a search for iOS Malware should give you options. Larry?AC9OX Sent from Yahoo Mail for iPad

what do you use to scan for malesre in the iphone? i eould like to get a anti virus scanner Martin [email protected]> wrote: