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Having Space Constraint At Your QTH To Put Up An Antenna For HF Band?. Then Try Constructing This Magnetic Loop Antenna. D...
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There is calculator for building magnetic loop antenna. Try this calculator, to see hows the performance before making you own magnetic loop...
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Maybe some of us are regretting about their ISP ( Ex: Celcom broadband in Malaysia ) blocking ports for Echolink. This method also applicabl...
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DroidPSK is an app for Android to decode and encode Ham Radio BPSK31 with the build in microphone/speaker or wired to your radio. A waterf...
Thursday, December 24, 2009
Wednesday, December 23, 2009
Thursday, December 17, 2009
Monday, December 14, 2009
Goofs For Die Hard 4 (Live Free Or Die Hard)
- Factual errors: The "police radio" in McClane's NYPD car (and a few other official vehicles in the film) was actually a ham radio. It was an ADI model AR-147 FM transceiver. It was tuned to 144.330 MHz which is an amateur radio frequency in the two meter band. Except for extraordinary emergencies, that band is not used for law enforcement communication.
- Factual errors: The frequency seen programmed into the NYPD unmarked cruiser police radio is 144.33 mhz. That frequency is assigned by the FCC to ham radio operators.
- Factual errors: The CB radio frequency is 66.6 but CB radio is in the 27MHz frequency. 66.6 would be in the broadcast TV portion of the spectrum.
- Factual errors: Downloading 500 Terabyte of data via USB connection would take at least 100 days, but in the film it takes less than 2 days.
Sunday, December 06, 2009
FireFound And Prey - Locate Your Stolen Laptop
FireFound
FireFound is an add-on for Firefox and Fennec (mobile Firefox) that helps your find your computer (or mobile phone, in the case of Fennec) if it is lost or stolen. Every time your computer's location changes, FireFound sends a secure message to a central server with its current location. You can then log into the server and see your computer's current location.All of the location data is encrypted, so no one can find out where your computer is without your password.
If you lose your computer, you can tell FireFound to clear your personal data (saved passwords, browsing history, etc.) if anyone starts your browser before you can retrieve it.
You can even run your own FireFound server; all of the code is open-source.
Note: All geolocation data is approximate, and should only be used as a guideline. If your computer has been stolen, do not try to retrieve it yourself - alert the police.
Download
You can download the FireFound browser add-on from Mozilla Add-ons. The next time you restart your browser, you'll be asked to choose a username and password for your account. You can use that username and password to log in at this website and view the latest locations of your computer.Prey is a lightweight application that will help you track and find your laptop if it ever gets stolen. It works in all operating systems and not only is it Open Source but also completely free.
Recover what is rightfully yours
Prey helps you locate your missing laptop by sending timed reports with a bunch of information of its whereabouts. This includes the general status of the computer, a list of running programs and active connections, fully-detailed network and wifi information, a screenshot of the running desktop and — in case your laptop has an integrated webcam — a picture of the thief.Silent but deadly
Prey uses a remote activation system which means the program sits silently in your computer until you actually want it to run. If so, it gathers all the information and sends it to your Prey web control panel or directly to your mailbox. The thief will never know his movements are being watched.And because there’s always hope
You may be thinking “but what’s the point of this program if the guy will probably just format the thing right away?” and you’re completely right. However, experience shows that thieves tend to look in stolen computers for valuable information, so there’s actually a chance you can catch the guy (and there’s even some successful cases!).Besides, if by using Prey you can keep alive a tiny bit of hope that you’ll recover your computer, isn’t it already worth it?
Wifi autoconnect
Prey checks if there’s an active internet connection to send the information. If not, it will attempt to connect to the nearest open wifi access point available. This gives you a better chance to locate the device.Geo-location aware
Prey uses wifi hotspots to locate devices geographically. This not only includes lat/lng coordinates, but also an altitude indicator — yes, that means you can also know (aprox.) in which floor the computer is.Lightweight
Yes, this is a feature. Prey is written in bash which means it has virtually no dependencies, only what its different modules need to work. This also means Prey is portable and should run in just about any computer.
Modular architecture
You can add, remove and configure the different parts of Prey as you wish. Prey is composed by modules, each one performing a specific task, so you can have it as you like.Powerful report system
Get the list of current running programs, the recently modified files, active connections, running uptime, take a screenshot of the running desktop or even a picture of the guy who’s using the computer.Messaging/alert system
You can alert the user he’s being chased at by sending messages which’ll appear on screen. You can also trigger alarms to make the message clear not only to him but also to whomever is nearby. Be careful with this one!Module auto-installer
You don’t have to reinstall Prey to keep up with the latest and greatest modules. We keep a repository from where Prey will fetch what it needs to get the job done.In plain English
Prey wakes up at a specified interval and checks a URL to see if it should gather the traces and send the report. If the URL exists, Prey will simply go to sleep again. Basically, that’s it.However, there’s two ways to run Prey: synchronized with the web control panel or in a standalone fashion.
1. Prey + Control Panel
In this case, you manage your computer state and Prey’s configuration through a web page, which also keeps track of all reports sent by Prey from your device. This is the method we recommend for most users, since you don’t have to worry about the URL thingy and you can actually “talk” to Prey by triggering different behaviours.2. Prey Standalone
In standalone mode, the report goes directly to your inbox but it’s up to you to generate the URL to activate Prey. In this case you don’t need to sign up in Prey but you’ll have to set up the different modules by hand if you want to tune things up. This is actually the way Prey worked before version 0.3 was released.Of course, Prey needs to have an active Internet connection to send the information. If the computer isn’t connected, Prey will attempt to connect to the nearest open wifi access point available.
In Linux/Mac, Prey can (and should) be run as root so it doesn’t depend on an active user session to run, but only on a successful boot.
Download
You can download prey hereSaturday, December 05, 2009
Basic Electronics For The New Ham Slide
Becoming ham radio operator or amateur radio operator ?
First of all, we need to know a lil bit about electrics and electronics.
Get a slide from ARRL
Between Amateur Radio Of Malaysia And United States
Technician Class License. You can get an entry level Amateur Radio Technician license by passing a 35-question multiple-choice examination. No Morse code test is required. The exam covers basic regulations, operating practices, and electronics theory, with a focus on VHF and UHF applications.
Technician Class operators are authorized to use all amateur VHF and UHF frequencies (all frequencies above 50 MHz). Technicians also may operate on the 80, 40, and 15 meter HF bands using Morse code, and on the 10 meter band using Morse code, voice, and digital modes. No Morse code test is required.
General Class License. The General Class license offers a giant step up in operating privileges. The high-power HF privileges granted to General licensees allow for cross-country and worldwide communication.
Technicians may upgrade to General by passing a 35-question multiple-choice examination. The written exam covers intermediate regulations, operating practices, and electronics theory, with a focus on HF applications. You must successfully pass the Technician exam to be eligible to sit for the General class exam. No Morse code test is required.
In addition to the Technician privileges, General Class operators are authorized to operate on any frequency in the 160, 30, 17, 12, and 10 meter bands. They may also use significant segments of the 80, 40, 20, and 15 meter bands.
Amateur Extra Class License. The HF bands can be awfully crowded, particularly at the top of the solar cycle. Once you earn HF privileges, you may quickly yearn for more room. The Extra Class license is the answer. Extra Class licensees are authorized to operate on all frequencies allocated to the Amateur Service.
General licensees may upgrade to Extra Class by passing a 50-question multiple-choice examination. No Morse code test is required. In addition to some of the more obscure regulations, the test covers specialized operating practices, advanced electronics theory, and radio equipment design.
From http://www.arrl.org/FandES/ead/classes.html
Here in Malaysia, we need to pass 100 questions to get B license ( UHF, VHF and only 10 meter on HF ) and need to sit for CW test to get A class ( Can working on any amateur bands ).
Technician Class operators are authorized to use all amateur VHF and UHF frequencies (all frequencies above 50 MHz). Technicians also may operate on the 80, 40, and 15 meter HF bands using Morse code, and on the 10 meter band using Morse code, voice, and digital modes. No Morse code test is required.
General Class License. The General Class license offers a giant step up in operating privileges. The high-power HF privileges granted to General licensees allow for cross-country and worldwide communication.
Technicians may upgrade to General by passing a 35-question multiple-choice examination. The written exam covers intermediate regulations, operating practices, and electronics theory, with a focus on HF applications. You must successfully pass the Technician exam to be eligible to sit for the General class exam. No Morse code test is required.
In addition to the Technician privileges, General Class operators are authorized to operate on any frequency in the 160, 30, 17, 12, and 10 meter bands. They may also use significant segments of the 80, 40, 20, and 15 meter bands.
Amateur Extra Class License. The HF bands can be awfully crowded, particularly at the top of the solar cycle. Once you earn HF privileges, you may quickly yearn for more room. The Extra Class license is the answer. Extra Class licensees are authorized to operate on all frequencies allocated to the Amateur Service.
General licensees may upgrade to Extra Class by passing a 50-question multiple-choice examination. No Morse code test is required. In addition to some of the more obscure regulations, the test covers specialized operating practices, advanced electronics theory, and radio equipment design.
From http://www.arrl.org/FandES/ead/classes.html
Here in Malaysia, we need to pass 100 questions to get B license ( UHF, VHF and only 10 meter on HF ) and need to sit for CW test to get A class ( Can working on any amateur bands ).
Malaysia Boleh!
p/s: im not hating morse code, im loving it. i have my own training keyer, but sometimes we need to see on other side too. just keep moving forward.
p/s: im not hating morse code, im loving it. i have my own training keyer, but sometimes we need to see on other side too. just keep moving forward.
Doppler effect
The sudden change in pitch of a car horn as a car passes by (source motion) or in the pitch of a boom box on the sidewalk as you drive by in your car (observer motion) was first explained in 1842 by Christian Doppler. His Doppler Effect is the shift in frequency and wavelength of waves which results from a source moving with respect to the medium, a receiver moving with respect to the medium, or even a moving medium.
The perceived frequency (f ´) is related to the actual frequency (f0) and the relative speeds of the source (vs), observer (vo), and the speed (v) of waves in the medium by
The choice of using the plus (+) or minus (-) sign is made according to the convention that if the source and observer are moving towards each other the perceived frequency (f ´) is higher than the actual frequency (f0). Likewise, if the source and observer are moving away from each other the perceived frequency (f ´) is lower than the actual frequency (f0). Although first discovered for sound waves, the Doppler effect holds true for all types of waves including light (and other electromagnetic waves). The Doppler effect for light waves is usually described in terms of colors rather than frequency. A red shift occurs when the source and observer are moving away from eachother, and a blue shift occurs when the source and observer are moving towards eachother. The red shift of light from remote galaxies is proof that the universe is expanding.
The animations below will illustrate this phenomena for a moving source and stationary observer.
Stationary Sound Source
The movie at left shows a stationary sound source. Sound waves are produced at a constant frequency f0, and the wavefronts propagate symmetrically away from the source at a constant speed v, which is the speed of sound in the medium. The distance between wavefronts is the wavelength. All observers will hear the same frequency, which will be equal to the actual frequency of the source. For a movie showing how circular waves can be created (in terms of particle motion and wave motion) go here. |
Source moving with vsource < vsound ( Mach 0.7 )
In the movie at left the same sound source is radiating sound waves at a constant frequency in the same medium. However, now the sound source is moving to the right with a speed vs = 0.7 v (Mach 0.7). The wavefronts are produced with the same frequency as before. However, since the source is moving, the center of each new wavefront is now slightly displaced to the right. As a result, the wavefronts begin to bunch up on the right side (in front of) and spread further apart on the left side (behind) of the source. An observer in front of the source will hear a higher frequency f ´ > f0, and an observer behind the source will hear a lower frequency f ´ < f0. |
Source moving with vsource = vsound ( Mach 1 - breaking the sound barrier )
Now the source is moving at the speed of sound in the medium (vs = v, or Mach 1). The speed of sound in air at sea level is about 340 m/s or about 750 mph. The wave fronts in front of the source are now all bunched up at the same point. As a result, an observer in front of the source will detect nothing until the source arrives. The pressure front will be quite intense (a shock wave), due to all the wave fronts adding together, and will not be perceived as a pitch but as a "thump" of sound as the pressure wall passes by. The figure at right shows a bullet traveling at Mach 1.01. You can see the shock wave front just ahead of the bullet. Jet pilots flying at Mach 1 report that there is a noticeable "wall" or "barrier" which must be penetrated before achieving supersonic speeds. This "wall" is due to the intense pressure front, and flying within this pressure front produces a very turbulent and bouncy ride. Chuck Yeager was the first person to break the sound barrier when he flew faster than the speed of sound in the X-1 rocket-powered aircraft on October 14, 1947. Check out the movie The Right Stuff for more about this significant milestone, and the beginnings of the US space project. The figure at right shows a n F-18 at the exact instant it goes supersonic. Click on the figure to see more information and a MPEG movie of this event. |
Source moving with vsource > vsound (Mach 1.4 - supersonic)
The sound source has now broken through the sound speed barrier, and is traveling at 1.4 times the speed of sound (Mach 1.4). Since the source is moving faster than the sound waves it creates, it actually leads the advancing wavefront. The sound source will pass by a stationary observer before the observer actually hears the sound it creates. As you watch the animation, notice the clear formation of the Mach cone, the angle of which depends on the ratio of source speed to sound speed. It is this intense pressure front on the Mach cone that causes the shock wave known as a sonic boom as a supersonic aircraft passes overhead. The shock wave advances at the speed of sound v, and since it is built up from all of the combined wave fronts, the sound heard by an observer will be quite intense. A supersonic aircraft usually produces two sonic booms, one from the aircraft's nose and the other from its tail, resulting in a double thump. The figure at right shows a bullet travelling at Mach 2.45. The mach cone and shock wavefronts are very noticeable. |
Thursday, December 03, 2009
Thursday, November 26, 2009
Numb3rs Description About IRC ( Internet Relay Chat )
WTF ?
Internet Relay Chat (IRC) is a form of real-time Internet text messaging (chat) or synchronous conferencing.[1] It is mainly designed for group communication in discussion forums, called channels,[2] but also allows one-to-one communication via private message[3] as well as chat and data transfers via Direct Client-to-Client.[4]
As of May 2009, the top 100 IRC networks served more than half a million users at a time, with hundreds of thousands of channels (the vast majority of which stand mostly vacant), operating on a total of roughly 1,500 servers worldwide.[5]
IRC was created by Jarkko Oikarinen in August 1988 to replace a program called MUT (MultiUser Talk) on a BBS called OuluBox in Finland. Oikarinen found inspiration in a chat system known as Bitnet Relay, which operated on the BITNET.[6]
IRC was used to report on the 1991 Soviet coup d'état attempt throughout a media blackout.[7] It was previously used in a similar fashion during the Gulf War.[8] Logs of these and other events are kept in the ibiblio archive.[9]
IRC client software is available for virtually every computer operating system that supports TCP/IP networking.
Internet Relay Chat (IRC) is a form of real-time Internet text messaging (chat) or synchronous conferencing.[1] It is mainly designed for group communication in discussion forums, called channels,[2] but also allows one-to-one communication via private message[3] as well as chat and data transfers via Direct Client-to-Client.[4]
As of May 2009, the top 100 IRC networks served more than half a million users at a time, with hundreds of thousands of channels (the vast majority of which stand mostly vacant), operating on a total of roughly 1,500 servers worldwide.[5]
IRC was created by Jarkko Oikarinen in August 1988 to replace a program called MUT (MultiUser Talk) on a BBS called OuluBox in Finland. Oikarinen found inspiration in a chat system known as Bitnet Relay, which operated on the BITNET.[6]
IRC was used to report on the 1991 Soviet coup d'état attempt throughout a media blackout.[7] It was previously used in a similar fashion during the Gulf War.[8] Logs of these and other events are kept in the ibiblio archive.[9]
IRC client software is available for virtually every computer operating system that supports TCP/IP networking.
Friday, November 20, 2009
What You Need To Do When You Bought A Nokia Phone
Check This
1. *#92702689# = Make sure the lifetimer is 000000:00 value.
2. *#06# - Make sure the phone's IMEI number is same with the box
3. *#0000# - Make sure it's firmware is up to date
4. Check the screen for dead pixel by changing the screen to 1 colour.
5. Check for any physical or tempted damage on the phone body
Wednesday, November 18, 2009
Aurora - What Makes Them Happen ?
Before we can understand auroras, we need a few facts about the space around our Earth. There are many things in this space that we can't see.
One thing is the air we breathe, our atmosphere. It is really a mixture of several gases, mostly nitrogen and oxygen, with traces of hydrogen, helium and various compounds.
A Field of Earth
Another thing we can't see is a magnetic field that surrounds the Earth. If you've ever played with a bar magnet and iron filings you've seen the curved patterns the filings form in the magnetic field. The next picture shows how the magnetic field around the earth's core is like the field of a bar magnet.
Another thing we can't see is a magnetic field that surrounds the Earth. If you've ever played with a bar magnet and iron filings you've seen the curved patterns the filings form in the magnetic field. The next picture shows how the magnetic field around the earth's core is like the field of a bar magnet.
The Earth's "magnet" is deep in the core. Since we can't see the magnetic field, we draw lines to represent it. The field lines go into and out of the Earth around the Earth's magnetic poles.
Where the lines are closest together the field is strongest. Where they are furthest apart it is weakest. Can you tell where the magnetic field is the strongest? Where is it weakest?
Charged Particles
A third invisible thing in the space around the Earth is a plasma, made of lots of charged particles. There are always electrons and positive ions in the surrounding magnetic field. Charged particles in a magnetic field move in a special way: they are guided by the field. The particles travel along magnetic field lines as if they were wires, circling around the lines in a long spiral as they go. Charged particles are the "ammunition" of an aurora.
A third invisible thing in the space around the Earth is a plasma, made of lots of charged particles. There are always electrons and positive ions in the surrounding magnetic field. Charged particles in a magnetic field move in a special way: they are guided by the field. The particles travel along magnetic field lines as if they were wires, circling around the lines in a long spiral as they go. Charged particles are the "ammunition" of an aurora.
Solar Powered Display
The short answer to how the aurora happens is that energetic electrically charged particles (mostly electrons) accelerate along the magnetic field lines into the upper atmosphere, where they collide with gas atoms, causing the atoms to give off light. But why does that happen? To find the answer, we must look further away, to the Sun. The spectacular, "great" auroras in "What do they look like?" are powered by what is called the solar wind.
The short answer to how the aurora happens is that energetic electrically charged particles (mostly electrons) accelerate along the magnetic field lines into the upper atmosphere, where they collide with gas atoms, causing the atoms to give off light. But why does that happen? To find the answer, we must look further away, to the Sun. The spectacular, "great" auroras in "What do they look like?" are powered by what is called the solar wind.
The Sun also has an atmosphere and a magnetic field that extend into space. The Sun's atmosphere is made of hydrogen, which is itself made of subatomic particles: protons and electrons. These particles are constantly boiling off the Sun and streaming outward at very high speeds. Together, the Sun's magnetic field and particles are called the "solar wind."
This wind is always pushing on the Earth's magnetic field, changing its shape. You change the shape of a soap bubble in a similar way when you blow on its surface. We call this compressed field around the earth the magnetosphere. The Earth's field is compressed on the day side, where the solar wind flows over it. It is also stretched into a long tail like the wake of a ship, which is called the magnetotail, and points away from the Sun.
Squeezing the Earth's magnetic field takes energy, just the way it takes energy to compress a balloon with air in it. The whole process is still not fully understood, but energy from the solar wind is constantly building up in the magnetosphere, and this energy is what powers auroras.
The Big Push
So we have the Earth's magnetosphere, with the solar wind squeezing the magnetosphere and charged particles everywhere in the field. Solar particles are always entering the tail of the magnetosphere from the solar wind and moving toward the Sun. Now and then, when conditions are right, the build-up of pressure from the solar wind creates an electric voltage between the magnetotail and the poles, like the voltage between the two terminals of a battery. It can reach about 10,000 volts!
So we have the Earth's magnetosphere, with the solar wind squeezing the magnetosphere and charged particles everywhere in the field. Solar particles are always entering the tail of the magnetosphere from the solar wind and moving toward the Sun. Now and then, when conditions are right, the build-up of pressure from the solar wind creates an electric voltage between the magnetotail and the poles, like the voltage between the two terminals of a battery. It can reach about 10,000 volts!
The voltage pushes electrons (which are very light) toward the magnetic poles, accelerating them to high speeds, much like the electrons in a TV picture tube that accelerate to hit the screen. They zoom along the field lines towards the ground to the north and south, until huge numbers of electrons are pushed down into the upper layer of the atmosphere, called the ionosphere.
In the ionosphere, the speeding electrons collide violently with gas atoms. This gives the gas atoms energy, which causes them to release both light and more electrons. In this way, the gases of the ionosphere glow and conduct flowing electric currents into and out of the polar region. The electrons flowing back out don't have as much energy as the speedy incoming ones had - that energy went into creating the aurora!
The way the aurora works is a lot like a neon sign, except that in the aurora, the conducting gas is in the ionosphere, instead of a glass tube, and the current travels along magnetic field lines instead of copper wires.
Aurora can affect propagation conditions over the polar routes and is often used to enhance VHF propagation, especially at 50 MHz and sometimes the 144 MHz Amateur bands. At times of auroral displays, HF radio signals traveling over the polar route will develop a distinctive warbling sound. You can often hear these effects on 14 MHz SSB signals that have followed the great circle route over the polar region. During intense auroral activity, HF propagation down to the 3.5 MHz band can be affected. And if you are lucky enough to be in the right place, you can watch the spectacular visible auroral displays in the night-time sky.
p/s: sadly, there is no aurora phenomena here in Malaysia
The way the aurora works is a lot like a neon sign, except that in the aurora, the conducting gas is in the ionosphere, instead of a glass tube, and the current travels along magnetic field lines instead of copper wires.
Aurora can affect propagation conditions over the polar routes and is often used to enhance VHF propagation, especially at 50 MHz and sometimes the 144 MHz Amateur bands. At times of auroral displays, HF radio signals traveling over the polar route will develop a distinctive warbling sound. You can often hear these effects on 14 MHz SSB signals that have followed the great circle route over the polar region. During intense auroral activity, HF propagation down to the 3.5 MHz band can be affected. And if you are lucky enough to be in the right place, you can watch the spectacular visible auroral displays in the night-time sky.
p/s: sadly, there is no aurora phenomena here in Malaysia
Saturday, November 14, 2009
Extending ICOM IC-E91 HT Frequency Range
Description: Type: Amateur VHF/UHF transceiver
Frequency range: TX: 144-146 / 430-440 MHz
RX: 0.495-999.990 MHz
5/6.25/8.33/9/10/12.5/15/20/25/30/50/100/200 KHz steps
Mode: TX: FM (DV option (Digital voice) UT-121)
RX: AM/FM/WFM (DV option (Digital voice) UT-121)
RF Power output: Hi: 5/5
Lo: 0.5/0.5 W
Sensitivity: N/A
Selectivity: N/A
Image rejection: N/A
Voltage: ? VDC battery or 10-16 VDC external
Current drain: RX: 17-370 mA
TX: Max 2.2 A
Impedance: 50 ohms, SMA
Dimensions (W*H*D): 58*103*34 mm
Weight: 300 gr (with battery and antenna)
Manufactured: Japan, 2006-200x
Other: 1304 memories. DTMF and CTCSS. Spectrum scope
PC-programmable. Alpha tags. Twin RX. D-Star option
Frequency range: TX: 144-146 / 430-440 MHz
RX: 0.495-999.990 MHz
5/6.25/8.33/9/10/12.5/15/20/25/30/50/100/200 KHz steps
Mode: TX: FM (DV option (Digital voice) UT-121)
RX: AM/FM/WFM (DV option (Digital voice) UT-121)
RF Power output: Hi: 5/5
Lo: 0.5/0.5 W
Sensitivity: N/A
Selectivity: N/A
Image rejection: N/A
Voltage: ? VDC battery or 10-16 VDC external
Current drain: RX: 17-370 mA
TX: Max 2.2 A
Impedance: 50 ohms, SMA
Dimensions (W*H*D): 58*103*34 mm
Weight: 300 gr (with battery and antenna)
Manufactured: Japan, 2006-200x
Other: 1304 memories. DTMF and CTCSS. Spectrum scope
PC-programmable. Alpha tags. Twin RX. D-Star option
------------------------------------------------------------------------------------------------
Gentleman,
as u can see here, the default tx frequency range for icom ic-91 is only between 144-146 and 430-440 MHz
for those who want to extend their tx frequency range Allows TX from 137.000 – 174.000 and 400.000 – 470.000, just follow these simple steps.
----------------------------------------------------------------------------------
Begin
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Begin
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1. Remove battery, and four screws inside the battery compartment.
2. Remove the two screws at the top (outside) back of the radio.
3. Pull front and back of radio apart gently. There will be a white flat ribbon cable connecting the two.
2. Remove the two screws at the top (outside) back of the radio.
3. Pull front and back of radio apart gently. There will be a white flat ribbon cable connecting the two.
4. (Optional) Pull the brown part of the ribbon cable connector upwards using your fingernail or small screwdriver. This will release the ribbon cable, and give your fingers some room to move the soldering iron.
5. Locate the diode D13. It is in the upper right hand corner. This diode needs to be removed for expanded TX operation. With a small tipped soldering iron, gently pull up on the diode as you melt the solder. You should be able to lift one side of the diode, then when you move the soldering iron to the other side, it should lift off (or fly across the table, never to be seen again).
6. Put the radio back together in the reverse order it was taken apart.
7. DONE! now u can test your handy talkie.
This modification does allow the DV mode to be used on any TX band.
Tuesday, November 10, 2009
iDitDah - Morse Code Keyboard/Trainer For iPhone and iPod Touch
iDitDahText is a keyboard alternative for the iPhone and iPod touch invented by KB1OOO that allows you to enter characters by tapping their Morse code. The interface is a dual lever touch paddle (which also can be used as single lever paddle), coupled to an iambic keyer and decoder. Please watch the video above for details along with a demonstration of text being entered at 50 WPM. iDitDahText also provides a plugin for a game called Typing Sebastian: a simple, fun way to learn how to use Morse code with iDitDahText.
Monday, November 09, 2009
Tuesday, November 03, 2009
My Scout Memory Items - 9W2PJU
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