OT - if you are looking for a cheap but great trip

开云体育

Because of the very weak Yen, you can have a glorious trip to Japan cheaply now.

Not only can you fly cheaply by ZipAir (a subsidiary of the JAL) as below, you can get a decent hotel room for under $100/night (with breakfast!) in Tokyo and eat each meal under $10. This sort of situation has never happened in my life time and it will unlikely happen again.

Just in case you are interested.

Hiroki AH6CY

Ps I don't work for the Japanese Tourist Bureau, nor for the Japanese government.

?

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Subject: 【ZIPAIR】BLACK FRIDAY Special Sale From Los Angeles to Tokyo (Narita) USD 208?
Date: November 19, 2024 at 5:01:55 PM PST
To: hirokik@...

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Friday

#10192

The WX looks unsuitable for outdoor ops. I do not plan to go to the Baylands at all.
Have a great Thanksgiving everyone.

Hiroki AH6CY

Re: Friday

#10191

I'll be there for Lunch and ops Friday 11/15.

?

Chris

W6COV

?

Here is an interesting link on Antenna & more

#10190

You may have to use Google translate.

Enjoy, Dave W6VYC

Re: Friday

#10189

Not sure I will be able to make it. It will be a game time decision.?

Joy

N6GO

Re: Friday

#10188

I will be at lunch and ops.

Dave W6VYC

On Wednesday, November 13, 2024 at 02:23:07 PM PST, Hiroki Kato <hiroki@...> wrote:

I will be at the Baylands for a short while. I may skip lunch.

Hiroki AH6CY

Ps Does any one have subscription to the Signal, a British QRP magazine?

Friday

#10187

I will be at the Baylands for a short while. I may skip lunch.

Hiroki AH6CY
Ps Does any one have subscription to the Signal, a British QRP magazine?

Re: Friday

#10186

Thank you Hiroki.? ?Very interesting sounds like fun.? I miss our Friday lunches.? ?I go for tests on Monday and if all goes well surgery in 10 days or two weeks.? ?Fingers crossed.? ?Probably 3 - 4 months before I can come.

?

Doug

Re: Friday

#10185

开云体育

Doug,

There were ten of us at lunch. Conversation lively as usual. Oliver bought a super cool looking all self-contained 10GHz transceiver he assembled with a KX2 as its base xciever. It was small and light enough to hold it on one hand. Bravo to Oliver's craftsmanship.?

I cannot speak for others about ops at the Baylands because I was operating inside my car with my big delta loop attached to the vehicle away from others. But 17, 15 and 10 were hopping. On 10, especially, signals from JA, LU, PY were booming in. I even heard VK and ZL. My antenna has bi-directional?

Orientation and it was facing Asia/

Australia and South America. If I had turned it towards EU, I might have picked up some signals from that direction. I really felt Cycle 25 is peaking.

Would you be coming to visit us any time soon? When is your heart valve surgery?

Hiroki AH6CY

?

Show quoted text

On Nov 9, 2024, at 9:18 AM, Doug Hendricks via <ki6ds1@...> wrote:

How was lunch and operating??? It's always interesting to hear about Friday? adventures at Baylands?

Re: Friday

#10184

How was lunch and operating??? It's always interesting to hear about Friday? adventures at Baylands?

Re: Friday

#10183

I plan to hang with y'all for lunch, then bike, then at ops until closing time... Best, --David KM6RI

Re: Time change

#10182

Standard time (at least in winter in North America) is hard on us night people--just a few hours of light available after we emerge from our caves. And for some reason I was not able to get to sleep this (Thurs) morning until about 6 AM... dunno, maybe something about the news... can't help thinking about OM Dali. Best, --David KM6RI

Re: Friday

#10181

I can't make it this week.? Hopefully next week I will be free.

?

Chris W6COV

?

Friday

#10180

I will be at the Baylands starting with lunch.
Hiroki AH6CY

Re: saving measurements from nanoVNA

#10179

A nanoVNA has a USB serial port. ?You can type commands into its serial interface to make the nanoVNA dump the frequency and IQ data from the last scan as plain text. ?See: ?

Maybe I do things the hard way; but I plug the nanoVNA into my Mac, open up a serial terminal app, command the nanoVNA to do a scan, dump the data, and use some simple scripts to reformat this text data into CSV files for spreadsheets, or "touchstone" files, or plot the data as either a Smith chart or an SWR graph.

73, Ron, n6ywu

Re: saving measurements from nanoVNA

#10178

Upon reflection, maybe this message will be more helpful.??

The nanoVNA is quite a complex thing capable of doing many things.? Navigating the menu of soft keys is not exactly intuitive, but it does allow a lot of functionality with simple hardware.?

If you go here:

you will find the complete manual discussing all the functionality.? Expect it will take as long to thoroughly understand as the manual for a full featured transceiver.?

On Monday, November 4, 2024 at 04:17:18 PM PST, Paul AA6PZ <aa6pz@...> wrote:

Actually it's easier than that. The VNA has the equations.

The other day, I was looking at the impedance of something.? In the top center of the display was the number in Ohms at the marker frequency. We all know that inductors have positive reactance and capacitors have negative reactance. So, if the Ohms value was positive, next to "Ohms" was uH.? If the value was negative, the value was pF.

Most times the VNA is sweeping over some range.? There is a marker that shows as a "dot" on the graph.? Press the left button and the marker frequency goes lower. Press the right button and it goes higher.? I think there is also a way to move the marker with the touch screen.?

I don't immediately recall the rest of the VNA settings.? Probably there is more than one way.

On Monday, November 4, 2024 at 03:26:37 PM PST, Christopher AI6KG <ch@...> wrote:

What AA6PZ said.??

In practical terms, find a frequency where the reactance is between 25 to 100 ohms, and do the math.? ?

To take the math a step further:

Z = 50?Ω?. (1?+ S11) / (1- S11).? ? ? ?

The real part is the real part (ohmic).

If the imaginary part is positive, it is inductive, and the imaginary part is jωL.

And if it is negative, it is capacitive and the imaginary part is 1/jωC.

Some VNA's??you this directly.? ?NanovnaSaver will:

73 de AI6KG

Show quoted text

On Mon, Nov 4, 2024 at 2:49?PM Paul AA6PZ via <aa6pz=[email protected]> wrote:

Simple

Use the nanoVNA to measure impedance. Take one of the following formulas and a little algebra to solve for C or L.
?

?

On Monday, November 4, 2024 at 02:41:07 PM PST, Doug Hendricks <ki6ds1@...> wrote:

Christopher,? how do you measure capacitors and inductors with? a nano vna?

Re: saving measurements from nanoVNA

#10177

AI6KG: Some VNA's show? you this directly.

?

AA6PZ: Actually it's easier than that. The VNA has the equations.

We are in violent agreement.? ?:-)? ?

I was just trying to show a bit more of the math.

73

On Mon, Nov 4, 2024 at 4:17?PM Paul AA6PZ via <aa6pz=[email protected]> wrote:

Actually it's easier than that. The VNA has the equations.

The other day, I was looking at the impedance of something.? In the top center of the display was the number in Ohms at the marker frequency. We all know that inductors have positive reactance and capacitors have negative reactance. So, if the Ohms value was positive, next to "Ohms" was uH.? If the value was negative, the value was pF.

Most times the VNA is sweeping over some range.? There is a marker that shows as a "dot" on the graph.? Press the left button and the marker frequency goes lower. Press the right button and it goes higher.? I think there is also a way to move the marker with the touch screen.?

I don't immediately recall the rest of the VNA settings.? Probably there is more than one way.

On Monday, November 4, 2024 at 03:26:37 PM PST, Christopher AI6KG <ch@...> wrote:

What AA6PZ said.??

In practical terms, find a frequency where the reactance is between 25 to 100 ohms, and do the math.? ?

To take the math a step further:

Z = 50?Ω?. (1?+ S11) / (1- S11).? ? ? ?

The real part is the real part (ohmic).

If the imaginary part is positive, it is inductive, and the imaginary part is jωL.

And if it is negative, it is capacitive and the imaginary part is 1/jωC.

Some VNA's??you this directly.? ?NanovnaSaver will:

73 de AI6KG

On Mon, Nov 4, 2024 at 2:49?PM Paul AA6PZ via <aa6pz=[email protected]> wrote:

Simple

Use the nanoVNA to measure impedance. Take one of the following formulas and a little algebra to solve for C or L.
?

?

On Monday, November 4, 2024 at 02:41:07 PM PST, Doug Hendricks <ki6ds1@...> wrote:

Christopher,? how do you measure capacitors and inductors with? a nano vna?

Re: saving measurements from nanoVNA

#10176

Actually it's easier than that. The VNA has the equations.

The other day, I was looking at the impedance of something.? In the top center of the display was the number in Ohms at the marker frequency. We all know that inductors have positive reactance and capacitors have negative reactance. So, if the Ohms value was positive, next to "Ohms" was uH.? If the value was negative, the value was pF.

Most times the VNA is sweeping over some range.? There is a marker that shows as a "dot" on the graph.? Press the left button and the marker frequency goes lower. Press the right button and it goes higher.? I think there is also a way to move the marker with the touch screen.?

I don't immediately recall the rest of the VNA settings.? Probably there is more than one way.

On Monday, November 4, 2024 at 03:26:37 PM PST, Christopher AI6KG <ch@...> wrote:

What AA6PZ said.??

In practical terms, find a frequency where the reactance is between 25 to 100 ohms, and do the math.? ?

To take the math a step further:

Z = 50?Ω?. (1?+ S11) / (1- S11).? ? ? ?

The real part is the real part (ohmic).

If the imaginary part is positive, it is inductive, and the imaginary part is jωL.

And if it is negative, it is capacitive and the imaginary part is 1/jωC.

Some VNA's??you this directly.? ?NanovnaSaver will:

73 de AI6KG

Show quoted text

On Mon, Nov 4, 2024 at 2:49?PM Paul AA6PZ via <aa6pz=[email protected]> wrote:

Simple

Use the nanoVNA to measure impedance. Take one of the following formulas and a little algebra to solve for C or L.
?

?

On Monday, November 4, 2024 at 02:41:07 PM PST, Doug Hendricks <ki6ds1@...> wrote:

Christopher,? how do you measure capacitors and inductors with? a nano vna?

Re: saving measurements from nanoVNA

#10175

What AA6PZ said.??

In practical terms, find a frequency where the reactance is between 25 to 100 ohms, and do the math.? ?

To take the math a step further:

Z = 50?Ω?. (1?+ S11) / (1- S11).? ? ? ?

The real part is the real part (ohmic).

If the imaginary part is positive, it is inductive, and the imaginary part is jωL.

And if it is negative, it is capacitive and the imaginary part is 1/jωC.

Some VNA's??you this directly.? ?NanovnaSaver will:

73 de AI6KG

Show quoted text

On Mon, Nov 4, 2024 at 2:49?PM Paul AA6PZ via <aa6pz=[email protected]> wrote:

Simple

Use the nanoVNA to measure impedance. Take one of the following formulas and a little algebra to solve for C or L.
?

?

On Monday, November 4, 2024 at 02:41:07 PM PST, Doug Hendricks <ki6ds1@...> wrote:

Christopher,? how do you measure capacitors and inductors with? a nano vna?

Re: saving measurements from nanoVNA

#10174

Paul, I? need more information.? ?I have a pair of alligator clips connected with rg174 to a sma connector.? ?I know how to calibrate that system.? ?What? settings do I set S11 to?? What am I looking to read?? Sorry, but I? don't know, that's why I am asking.? ?Doug