[DARARepeater] Thursday Night Group

Wed Jul 3 03:15:32 EDT 2019

Happy 4h of July - NO MEETING

YAGI Antenna workshop part 6 - JULY 11th!!

Upcoming Hamfest

Projects

** License Exam Questions of the week

The Thursday Night Group will NOT meet

Happy 4h of July - NO MEETING

Next meeting Thursday, July 11 at 7:00 pm at the DARA Clubhouse.

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Things this week:  

1. Happy 4h of July - NO MEETING

NO MEETING this week.  Our next meeting will be July 11th

Also a heads up - NO MEETING July 18 (ARRL Teachers Institute)  

2. YAGI Antenna workshop part 6  

Please come even if you have not attended the other sessions.  Lots of stuff
to learn. Just observing is fine; attendees do not have to build a Yagi.

This week you will start designing your antenna using Yagi design software
and figuring out what supplies you need to build it.

Join us for a Build-It: Yagi Antenna Workshop. This multi-session series
will focus on yagi antennas the vhf/uhf frequency bands, including designs
for ATV and EME. But HFers will also gain by attending.

This series will start with a good overview on antennas. The next session
will look at the function of a balun, the different types, and actually do
some testing of baluns. We'll look at how to select your build-it yagi, and
present some easy-to-assemble options for the driven element. For the
hands-on building, you can build your own, build with a group, or be an
observer.

The final sessions will include tuning and testing the yagi antennas, and if
there is interest, could include an antenna gain measurement event to verify
how well the antennas perform.

This 7 session course is planned to run every other week and will run for 7
sessions.  

Here is the proposed schedule:

Build-It: Yagi Workshop Series

.             Antenna Overview (Joe, WA8OGS)
March 21 - completed

.             Balun Overview, and testing baluns (Mike, W8RKO)
April 4 - completed

.             Driven Element Options (Joe, WA8OGS)
April 18 - completed

.             Selecting Your Build-It Yagi (Joe, WA8OGS)
May 2 - completed

.             Antenna Modeling (Mike, W8RKO)
June 6

.             Start your Yagi design using software - Hands On
July 11

.             Start Building - Hands On (group)
TBA

.             Tuning & Testing Your Yagi (Tom, N8ZM, & group)
TBA

.             Antenna Gain Measurements [maybe on a Saturday, 10am-2pm;
include

lunch?] (Tom, N8ZM, & group) 

Many thanks to Joe Burke, WA8OGS, and Mike Suhar, W8RKO, who have put this
together.

3. Upcoming Hamfest 

            07/21/19                      http://w8fy.org <http://w8fy.org/>

Van Wert Hamfest

08/03/19                      http://www.columbushamfest.com
<http://www.columbushamfest.com/>  

Columbus, Ohio Hamfest

08/17/19

Germantown Amateur Radio Society Hamfest

4. Projects

Bring something to work on.   What you building?

5. License Exam Questions of the week

One question is drawn from each of the three question pools. Steve, AE8AT,
is providing these questions.  Thanks Steve

Answers are at the end of this email.

We received a question regarding the strange mix of letters and numbers that
begin each question.  Every exam question has a unique combination of
letter-number-letter-number.  The first letter is a T, G, or E to identify
the question pool: Technician, General, or Extra.  Next is a single number
representing the category, for example, category zero is safety in all three
exam pools.  The first letter-number pair is called the "sub-element".   The
second letter is a "group" containing related questions.  Example,
sub-element G8 is Signals and Emissions, with group C of that sub-element
being Digital Emission Modes.  The questions are numbered sequentially:
G8C01, G8C02, and so forth always with a 2-digit number at the end.  The
question identity is included in case of a typo or some "help" from
autocorrect obscures either the question or the answer.  

As last week marked the end of the previous General question pool, this week
we mark the beginning of the new General question pool by selecting a
question never before seen! 

T6D08 Which of the following is combined with an inductor to make a tuned
circuit?

A. Resistor

B. Zener diode

C. Potentiometer

D. Capacitor

G6A11 What happens when an inductor is operated above its self-resonant
frequency?

A. Its reactance increases

B. Harmonics are generated

C. It becomes capacitive

D. Catastrophic failure is likely

E6D07 What is the usable frequency range of inductors that use toroidal
cores, assuming a correct selection of core material for the frequency being
used?

A. From a few kHz to no more than 30 MHz

B. From less than 20 Hz to approximately 300 MHz

C. From approximately 10 Hz to no more than 3000 kHz

D. From about 100 kHz to at least 1000 GHz

   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 evening's.

Everyone is invited!!! 

Answers:

T6D08 = D.

G6A11 = C.

E6D07 = B.  (Always refer to the data sheet for the specific components you
are using.)

Quiz 47

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