[DARARepeater] Thursday Night Group

Wed Mar 1 02:51:51 EST 2023

TNG – Anarchy

DARA Membership Meeting – Mar 3, 2023

Projects 

** License Exam Questions – 228

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The Thursday Night Group will meet IN PERSON

Thursday, Mar 2, 2023 

Speakers and any announcements will start about 7:30.

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Things this week:  

TNG –Anarchy

Anarchy continues.  

The DARA Homebrew night will be held at the May 5 general meeting.  Start getting your stuff ready.

Even though masks are not required feel free to wear a mask if you feel more comfortable.  There will be some wearing mask so you will not be the only one.

PLEASE if you are having any of the COVID or FLU symptoms DO NOT come to the clubhouse.

DARA Membership Meeting – Mar 3, 2023

We will have our next DARA Membership Meeting on Friday, March 3, 2023, at the Greene County Expo Center, 120 Fairgrounds Rd, Xenia Ohio at 7:00pm. We will meet in the Mercantile Building, our usual meeting room. We are in for an excellent discussion by the DARA President, Jack Gerbs. You will want to be present but if you are unable to attend, we will also be on Zoom. See below for Zoom instructions.

This month’s presentation is “Antenna’s and Antenna Analyzers” by Jack Gerbs, WB8SCT

Jack has been licensed since 1974 and mostly enjoys operating CW.
Jack’s presentation will cover the basics of resonant and non-resonant antennas. This includes a discussion of a simple halfwave dipole, end fed halfwave antennas, random length antennas and vertical antennas. He will demonstrate how to use different antenna analyzers to measure key antenna parameters. He will then wrap up with a demonstration of how to design and build simple matching networks based on the data gathered from an analyzer. There will be an actual demonstration of the tools used to measure an antenna and the design and implementation of a matching network.”  
Jack Gerbs

Zoom Information

Topic: DARA Membership Meeting March 3, 2023
Time: Mar 3, 2023 07:00 PM Eastern Time (US and Canada)

Join Zoom Meeting
https://us02web.zoom.us/j/85333863894?pwd=aFhodlBiOUE4LzNwYUVRUzlna0V6Zz09

Meeting ID: 853 3386 3894
Passcode: 511069
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Meeting ID: 853 3386 3894
Passcode: 511069
Find your local number: https://us02web.zoom.us/u/kbMelviuax <https://w8bi.us4.list-manage.com/track/click?u=36fca23aadf19ac2c8ca2ed6e&id=44588f7c50&e=636abda0f7> 

See everyone at the meeting,
Ron Cramer, KD8ENJ  

Projects 

Keep working on your projects at home OR bring them with you to TNG and do them there.   

The DARA Homebrew night will be held at the May 5 general meeting.  Start getting your stuff ready.

** License Exam Questions – 228

International Women’s Day is March 8th, so it seems important to focus on a famous woman in science (hopefully radio related). I believe Hedy Lamar and Edith Clarke were inspirations for earlier quizzes, and after an extended search apparently the only women who worked directly with radio. So, we turn to Shirley Ann Jackson who earned her PhD in 1973 from MIT, becoming the second African American woman to earn a PhD in the U.S. and the first from MIT. Skipping ahead to 1976 and her time with AT&T Bell Labs, she studied the behavior of electrons on the surface of liquid helium films (a quantum physics thing too deep for a Repeater quiz). She would serve on many company boards, universities, and government roles including heading the Nuclear Regulatory Commission and several Presidential advisory roles. She has received numerous awards for scientific achievement, both U.S. and internationally. All far too much to list here. For her work tickling electrons on the surface of helium, the quiz topic is the sun and its effects on amateur radio. (The sun being roughly 25% helium.)

References:

https://president.rpi.edu/leadership/honorable-shirley-ann-jackson-phd-dl-hon-dsc-hon-nae

https://www.aps.org/programs/honors/prizes/prizerecipient.cfm?last_nm=Jackson <https://www.aps.org/programs/honors/prizes/prizerecipient.cfm?last_nm=Jackson&first_nm=Shirley&year=2019> &first_nm=Shirley&year=2019

https://www.blackhistory.mit.edu/archive/shirley-jackson-mit-1973

https://www.womenofthehall.org/inductee/shirley-ann-jackson/

T3C09 What is generally the best time for long-distance 10 meter band propagation via the F region?

A. From dawn to shortly after sunset during periods of high sunspot activity

B. From shortly after sunset to dawn during periods of high sunspot activity

C. From dawn to shortly after sunset during periods of low sunspot activity

D. From shortly after sunset to dawn during periods of low sunspot activity

G3A02 What effect does a Sudden Ionospheric Disturbance have on the daytime ionospheric propagation of HF radio waves?

A. It enhances propagation on all HF frequencies

B. It disrupts signals on lower frequencies more than those on higher frequencies

C. It disrupts communications via satellite more than direct communications

D. None, because only areas on the night side of the Earth are affected

E3A12 What is the cause of auroral activity?

A. The interaction in the F2 layer between the solar wind and the Van Allen belt

B. An extreme low-pressure area in the polar regions

C. The interaction in the E layer of charged particles from the Sun with the Earth’s magnetic field

D. Meteor showers concentrated in the extreme northern and southern latitudes

For more information about B-Road Thursday Evening Group Projects…

Go to W8BI homepage ( <http://www.w8bi.org> http://www.w8bi.org) under Education, Thursday Group.

Or

Go to ( <https://sites.google.com/site/darathursdaynite/> https://sites.google.com/site/darathursdaynite)

There is a lot of information on this web site with additional content.

Hope to see you on Thursday evenings.

Everyone is invited!!! 

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Answers:

T3C09 = A.

G3A02 = B.

E3A12 = C.

Quiz 228

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