The Color
Codes of Optical SETI
by Bob Wexelbaum, W2ILP
There isn’t enough room to numerically mark
resistors with their ohmic values, in a way that they could be viewed no matter
how the resistors are mounted. This is
even truer today when we have tiny subminiature resistors that dissipate only
1/25 of a watt. A standard method of
labeling resistors had been designed a long time ago, when ˝ watt units were
the smallest in popular use. The
resistors are marked with a color code that all technicians and experimenters
soon learn. Small capacitors, such as
mica and ceramic types, are also marked with the same numeric color code, but
in the case of capacitors dots rather than bands of colors are used.
The
basic color code is designed to sequence in a manner similar to the colors of a
natural rainbow, except for numerals 0,1,8 and 9, and this is intended to aid
in remembering the code. A component’s
value is usually marked in three bands or dots.
In the case of resistors the third dot indicates the number of zeros
that are involved thereby acting as a multiplier of powers of ten. The code is: -
0=Black,
1=Brown, 2=Red, 3=
There
may be additional bands beyond the first three to mark the tolerance of values. For example; Silver=+/-10%, Gold=+/-5% and no
band =+/-20%
Remembering the color code has always
been a task for technicians that exceed remembering the Morse code in
usefulness, especially in today’s wonderful world of electronics. There was a
famous sentence that many used as a learning aid. It starts out with “Bad Boys…” to designate
Black and Brown…but the rest may be worth forgetting because it is sort of R
rated. I like to use: Big Brooms Rake Over Your Garden Beside Violets Growing
Wildly, which is more conservative.
The Color Codes of Optical SETI
(continued)
I have another hobby.
In addition to being an amateur radio operator, I attempt to be an
amateur poet. I try to limit my attempts
at poetry in this newsletter unless they pertain to ham radio. To prove that I have poetic license I will
now explain my attempt to meet a challenge that has long been avoided by many
professional poets. You must grant me a
little poetic license in regard to my solutions below. I don’t know if my poetic license is that of
a novice or an extra class word wrestler.
I’ll leave that up to you.
A
classical poetry challenge states that it is impossible to find words that
rhyme with:
Orange,
Purple, Month and Silver (Month isn’t a
color but I’ll include it just to illustrate that words other than colors had
been considered impossible to rhyme with anything…That is before W2ILP met the
challenge.) So here goes:
ORANGE: Home in
We usually say are-range…
But Pennsylvanians
cringe,
Because they prefer
ore-ringe.
PURPLE: I gave my cat a purr pill,
And she turned Purple.
MONTH: The last day of a month
Might be its
thirty-oneth
SILVER: [Now this was for me, the only real
challenge. For this one I had to study
works of Ogden Nash, who seemed to have dealt with similar challenges by fits
of fragmentation.]
When you’re panning for
gold, using mere pencil verification isn’t as certain as penning for silver.
White light is a mixture of colored
frequencies. Light of any pure color has a specific frequency just
as radio signals have specific carrier radio frequencies. Such light is known as coherent light, and
may be emitted by a laser that is physically capable of emitting one light,
frequency, in a way that is similar to a quartz crystal that generates only one
fundamental RF frequency. Light waves,
like radio waves, are electromagnetic waves and travels at the same
velocity. The wavelength of light is
extremely small so that light waves are measured in angstroms rather than
meters. Certain phenomena of light can not be explained by wave theory and so
the concept of light being in a form of energy bundles rather than waves is
often used. The light energy units are
known as photons. Color TV depends on resolving all visible colors from three
primary colors. The primary colors used
for all TV and computer monitor screens are Red, Green and Blue and differ from
the primary pigment colors, from which artists can produce almost the entire
color spectrum in paint. Paint is not a
source of light but a media which reflects only light colors that it is meant
to reflect.
Page 2
The Color Codes of Optical SETI
(continued)
Now let me get to a more serious
dissertation about light. It is the fact
that the SETI fans have given up on receiving microwave radio signals from
intelligent E.T.s and now are searching for light signals. Their program is now called O-SETI . I kid you not!
This is not a joke. It comes from a large article entitled “The
New Search for E.T.”, which appears in the November 2006 (not an April Fools
issue) of the prestigious “IEEE Spectrum”.
The article again explains Drake’s equation as a probable reason to
believe that highly intelligent E.T.s are probably trying to contact us. Now we can read about why they believe that
the E.T.s will be signaling with light rather than radio.
The techniques for receiving light
signals by using photo multipliers that convert photons into electrons and
optical telescopes called photon buckets may be advantageous over state of the
art microwave receivers and dish antennas, but the one way radar equation
applies to light in the same way that it applies to microwaves. Our one way
radar equation shows that enormous light power would be required to travel
hundreds of
GRUMMAN
AMATEUR RADIO CLUB
MINUTES OF GENERAL MEETING 10/18/2006
Karen KC2OPX,
secretary.
The
meeting was called to order by Pat at 5:40 PM.
TREASURERS REPORT – Ed, WB2EAV REPEATERS Gordon, KB2UB
Finances continue to be in good shape. Renewed membership in
METRO-CORE.
VE REPORT –
Bob, W2ILP
NET REPORT- Zack, WB2PUE
There were 4 applicants, 3 Technicians and Thursday night .330 had a good turn
out;.
1 General,. VEs
present were: AB2NT, .745
was fair. Sunday morning net has not
been good.
KA2GVD, WJ2R
and W2ILP.
Poor propagation on 40 Meters has cause some stations to not be
heard.
NEW BUSINESS
Bill
Savage, N2SFT, performed as Election Chairman, (taking over for Marty
NN2C). The election slate for 2007 was read, including all
incumbents. Any others desiring to run
for office should contact Bill. Bill presided over a moment of
silence for NN2C.
A
new location for GARC meetings, starting in January 2007, was negotiated by
Jack Cottrell, WA2PYK. The new location will be at Alan Park in
Farmingdale. The December 2005 meeting/ Holiday Party will be held at the Old
Country Buffet, 3023 Hempstead Turnpike,
PROGRAM
The
future of the Grumman Amateur Radio Club was discussed. Anyone with suggestions for future meeting presentations should contact Pat or
a board member.
The meeting
was adjoined at
GARC NETS:
40 Meters: 7.289 MHz at 7:30 AM EST
Sundays.
2 Meters (via repeaters): 146.745
MHz (-.600)at
145.330 MHz (- .600) at
[Tone for
both repeaters is 136.5 Hz]
(ARES/RACES) Mondays
MEETINGS
General Meetings of the GARC
are held on the third Wednesday of each month, starting at
Page
5
GARC WEB SITE
The web site of the GARC can
be found at http://www.qsl.net/wa2lqo/ Webmaster is Pat Masterson, KE2LJ. Pictures of GARC activities, archives of newsletters,
roster of members, and other information about the GARC may be found
there.
INTERNET LINK OF THE MONTH FOR INTERNERDS
In keeping with the motif of
this month’s cover story, the internet link of this month is a COLOR TEST. You can take the test yourself by going to:-
http://www.fireworkspop.com/colortest.htm
This test can prove more
about you than seeing if you are color blind.
It has nothing to do with your IQ so don’t worry about that. This ingenious test can show if you are able
to get the half of your brain that recognizes colors to take control over the
other half of your brain that recognizes printed words. Some people find that it is easy to do
so. For others it is nearly impossible. The fact is that different tasks make many of
us half witted. Some people are able to
control which of their half wits can do a special job. Some people can
not. It is sort of like the fact that
some people can’t rub their bellies and pat their heads at the same time…I
think. Converting sounds to letters and
words in order to copy Morse code may require functions of both halves of our
craniums but with one half dominating…because we don’t want to just copy the
sounds of dits a dahs; we want to do that plus convert the dits and dahs to
characters. This takes both brain
halves and some coordination between both halves and that is probably why
mastering CW is more of a difficult task for some people, especially the people
who lack good cross cranium coordination and communication skills.
PUZZLE
Here is another
cryptogram: UBHMMHP TZH
YGH NLXCD,
ILZ YGHN MGTBB
OCGHZOY
YGH CTYOLCTB
PHUY. ---GHZUHZY GLLSHV---
Solution to October’s
Cryptogram: THE ART OF LIVING LIES LESS
IN ELIMINATING OUR TROUBLES THAN IN GROWING WITH THEM. –BERNARD M. BARUCH--
REMINDER
Our November general meeting will be at the
Underwriters Lab in Melville on November 15th. This is expected to be our last meeting at
U.L. Our December meeting / Holiday
Party will be at the Old Country Buffet in
.
Page 6
GARC VE EXAMS We
are continuing to proctor exams for all classes of ham licenses on the second
Tuesday of each month, starting at The
present exams are:- Element
1: 5 WPM CW Element
2: Technician Element
3: General Element
4: Amateur Extra Class The
fee for 2006 is $14.00 for all exams taken in one sitting. Applicants
for upgrades should bring their present license and a photocopy of it and
know their FRN number. New,
first time applicants should be aware that their Social Security number will be
required on their application form, unless they register with the FCC for an
FRN. All
applicants should bring picture ID such as driver’s licenses. Until
further notice exams will be given at:- Room:
Briarcliffe
in It
is recommended that all applicants contact W2ILP to confirm the location,
which is subject to change. For
any information e-mail:- or phone- (631) 499-2214 Study material is available at the
web sites of the ARRL or W5YI All VECs use the same Q &A pools. Since
the beginning of the VE program the GARC has provided opportunities to take
the ham exams monthly, during all 12 months of every year. Bob
Wexelbaum, W2ILP and the GARC VE team. |
CQ de WA2LQO November 2006 VOL.
79, NO. 11 EDITOR Bob Wexelbaum W2ILP (631) 499-2214 CONTRIBUTING WRITERS PAT MASTERSON, KE2LJ BOB WEXELBAUM, W2ILP And all the members of GARC (we hope!) CQ de WA2LQO is published monthly by the
Grumman Amateur Radio Club for its members and friends. Send articles and
amateur equipment advertisements to: KE2LJ or W2ILP ELECTRONIC SUBMISSIONS If you want to
submit articles or amateur equipment ads via e-mail do the following: 1. For submission
direct to editor call him at above number to set up a transfer. 2. For e-mail
transfer: Internet Address We have been considering the possibility of
distributing this newsletter by e-mail or continuing to post it on our web
site rather than sending it by postal mail. This is because we may not be able to
reproduce the newsletter at Northrop Grumman in the future and also
because we might like to reduce postal costs. In order to do so we must know if
members have e-mail with attachment access, and/or Internet access. We realize that some members may not be
computer savvy, and do not want to lose them. Please send Pat your e-mail address, if you have one. Also send you telephone number. It would also help if you could tell if
you have Internet access (an ISP) and can read newsletters from the GARC
web site. You might tell if you
have MS Word, Adobe Acrobat or other text formatting software, as
well. Anyway sending the
newsletter digitally could make it more colorful. I
know that some of us OTs still remember B&W TV, but most of the
youngsters of today, like highly intelligent E.T.s, expect everything to
be in living color. On behalf of the GARC, I want to wish all of our
members and their families a *HAPPY THANKSGIVING*. 73, w2ilp (Incurring Less Postage?) GRUMMAN
AMATEUR RADIO CLUB OFFICERS FOR 2006 President
Pat Masterson KE2LJ
V01-01 516-346-7125 Vice President Gordon
Sammis KB2UB Retiree 631-666-7463 Secretary
Karen Cefalo
KC2OPX 1Yr Board Member
Zack Zilavy WB2PUE Retiree 631-667-4628 1Yr Board Member
Bob Christen W2FPF
2 Yr Board Member
Bob Wexelbaum W2ILP Retiree 631-499-2214 2 Yr Board Member
Jack Cottrell
WA2PYK Retiree 516-249-0979 Trustee
WA2LQO Ray Schubnel W2DKM Retiree STANDING
COMMITTEE CHAIRMEN Meeting
Programs Contact a Board Member FCC
Exam Coord. Bob Wexelbaum W2ILP Retiree 631-499-2214
EDITORIAL
Treasurer Ed Gellender
WB2EAV X02-14 516-575-0013
1YrBoard Member Dave Ledo AB2EF
|
TECHNICAL
BITS
The digital computer operates
using only two levels of signals. There
is “0” which is usually near zero voltage and “1” which is a voltage of around
2 to 5 volts, depending on the choice of hardware chips involved. The modern personal computer (PC) was made
possible by the development of the microprocessor chip (uP). To appreciate what a microprocessor does I
like to compare it to the human brain.
The organization of the digital computer was explained by John Von
Neumann. Every PC contains both analog to digital and digital inputs whose data
can be temporarily stored on random access memory (RAM) chips. A keyboard is an example of a digital
input. A microphone is an example of an
analog input. The computer also contains
permanently stored operating software that is stored on a hard drive, where it
may be accessed by commands from the uP.
The software for operating the computer program is called its Operating
System (OS).
Data can also be
stored on the hard drive, as well as specialized program files. The OS causes the uP to follow a series of
commands, which enable the computer to fetch information from RAM or from the
hard drive and perform logical comparisons, arithmetic logic, and other
operations. The resulting digital output
is sent out to driver hardware circuits. These video and audio drivers contain
digital to analog converters, and drive the monitor display, the audio speakers
and the printer. The operating commands
of the uP are all enabled by the computer’s clock. Each OS command requires one or more clock cycles. The speed of PC clocks has increased greatly
since the first PCs became practical, enabling the PC to do more real time work
such as displaying DVD video at a speed similar to TV video or better. The Von Neumann computer block diagram, has
given us some insight as to how the human brain must also work. It must contain memory to store information
and it must also contain a processor to operate on the information. In order to be highly intelligent the brain
must be able to handle problems that may be very abstract. Some people have a very good memory. They can learn by rote and do very well on
most tests…but they may not have the ability to process abstract information and
to develop thought based on inner direction.
They may not do well on IQ tests. High IQ geniuses often have poor
memories. They are not interested in
remembering stuff that is of no use to them.
What they do have is a talent for processing some types of information
from concepts or viewpoints that most people can’t develop. This is why Einstein did not get good grades
during his early school years and why he forgot what he ate for breakfast in
his later years.