[DARARepeater] Thursday Night Group

Tue Apr 30 11:02:44 EDT 2019

YAGI Antenna workshop part 4 - This Thursday!!

DARA Home Brew night - This Friday!!

** License Exam Questions of the week

The Thursday Night Group will meet

Thursday, May 2 at 7:00 pm at the DARA Clubhouse.

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Things this week:  

1.        YAGI Antenna workshop part 4 

This Thursday - May 2 - Selecting Your Build-It Yagi

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

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

.             Antenna Modeling (Mike, W8RKO)
June 6

.             Start Building - Hands On (group)
June 20

.             Tuning & Testing Your Yagi (Tom, N8ZM, & group)
June 24 or

maybe on a Saturday

.             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.

2.        Home Brew Projects DARA Home Brew night - This Friday!!

Bring something to work on.   What you building?

DARA Home Brew night May 3rd. so get busy!!

3.        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.  

Guglielmo Marconi was born on the 25th of April in 1874, Bologna, Italy.
Widely held as the discoverer of radio.  Marconi's Law pertains to the
height of antennas and the maximum transmit distance.  The question pools do
not all have perfectly themed questions so there is some departure from
Marconi's work.

T3C01 Why are direct (not via a repeater) UHF signals rarely heard from
stations outside your local coverage area?

A. They are too weak to go very far

B. FCC regulations prohibit them from going more than 50 miles

C. UHF signals are usually not reflected by the ionosphere

D. UHF signals are absorbed by the ionospheric D layer

G3C11 Which of the following antenna types will be most effective for skip
communications on 40-meters during the day?

A. A vertical antenna

B. A horizontal dipole placed between 1/8 and 1/4 wavelength above the
ground

C. A left-hand circularly polarized antenna

D. A right-hand circularly polarized antenna

E3C06 By how much does the VHF/UHF radio horizon distance exceed the
geometric horizon?

A. By approximately 15 percent of the distance

B. By approximately twice the distance

C. By approximately 50 percent of the distance

D. By approximately four times the distance

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:

T3C01 = C.

G3C11 = B.

E3C06 = A.

Quiz 38

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