Tuesday, February 9, 2016

What are Amateur radio DIGITAL MODES? with DOWNLOADS


What is an Amateur radio DIGITAL MODE?


Digital Modes are a means of operating Amateur radio from the computer keyboard. The computer acts as modem (modulator - demodulator), as well as allowing you to type, and see what the other person types. It also controls the transmitter, changes modes as required, and provides various convenient features such as easy tuning of signals and prearranged messages.

In this context, we are talking about modes used on the HF (high frequency) bands, specifically chat modes, those used to have a regular conversation in a similar way to voice or Morse, where one operator talks for a minute or two, then another does the same. These chat modes allow multiple operators to take part in a net.

Because of sophisticated digital signal processing which takes place inside the computer, digital modes can offer performance that cannot be achieved using voice (and in some cases even Morse), through reduced bandwidth, improved signal-to-noise performance and reduced transmitter power requirement. Some modes also offer built-in automatic error correction.

Digital Mode operating procedure is not unlike Morse operation, and many of the same abbreviations are used. Software such as Fldigi makes this very simple as most of the procedural business is set up for you using the Function Keys at the top of the keyboard. These are easy to learn.

note: this is taken from http://www.w1hkj.com/

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AMTOR is an FSK mode that is hardly used by radio amateurs in the 21st Century. While a robust mode, it only has 5 bits (as did its predecessor RTTY) and can not transfer extended ASCII or any binary data. With a set operating rate of 100 baud, it does not effectively compete with the speed and error correction of more modern ARQ modes like Pactor. The non-ARQ version of this mode is known as FEC, and known as SITOR-B by the Marine Information services.
To hear what an Amtor signal sounds like, click the sound iconsound_icon

PACTOR is an FSK mode and is a standard on modern Multi-Mode TNCs. It is designed with a combination of packet and Amtor Techniques. Although this mode is also fading in use, it is the most popular ARQ digital mode on amateur HF today and primarily used by amateurs for sending and receiving email over the radio. This mode is a major advancement over AMTOR, with its 200 baud operating rate, Huffman compression technique and true binary data transfer capability.
To hear what a Pactor signal sounds like, click the sound iconsound_icon

G-TOR (Golay -TOR) is an FSK mode that offers a fast transfer rate compared to Pactor. It incorporates a data inter-leaving system that assists in minimizing the effects of atmospheric noise and has the ability to fix garbled data. G-TOR tries to perform all transmissions at 300 baud but drops to 200 baud if difficulties are encountered and finally to 100 baud. (The protocol that brought back those good photos of Saturn and Jupiter from the Voyager space shots was devised by M.Golay and now adapted for ham radio use.) GTOR is a proprietary mode developed by Kantronics. Because it is only available with Kantronics multi-mode TNCs, it has never gained in popularity and is rarely used by radio amateurs.
To hear what a G-TOR signal sounds like, click the sound iconsound_icon

PACTOR II is a robust and powerful PSK mode which operates well under varying conditions. It uses strong logic, automatic frequency tracking; it is DSP based and as much as 8 times faster then Pactor. Both PACTOR and PACTOR-2 use the same protocol handshake, making the modes compatible. As with the original Pactor, it is rarely used by radio amateurs since the development of the new PC based sound card modes. Also, like GTOR, it is a proprietary mode owned by SCS and only available with their line of multi-mode TNC controllers.
To hear what a PactorII signal sounds like, click the sound iconsound_icon

CLOVER is a PSK mode which provides a full duplex simulation. It is well suited for HF operation (especially under good conditions), however, there are differences between CLOVER modems. The original modem was named CLOVER-I, the latest DSP based modem is named CLOVER-II. Clovers key characteristics are band-width efficiency with high error-corrected data rates. Clover adapts to conditions by constantly monitoring the received signal. Based on this monitoring, Clover determines the best modulation scheme to use.
To hear what a Clover signal sounds like, click the sound iconsound_icon

RTTY or "Radio Teletype" is a FSK mode that has been in use longer than any other digital mode (except for morse code). RTTY is a very simple technique which uses a five-bit code to represent all the letters of the alphabet, the numbers, some punctuation and some control characters. At 45 baud (typically) each bit is 1/45.45 seconds long, or 22 ms and corresponds to a typing speed of 60 WPM. There is no error correction provided in RTTY; noise and interference can have a seriously detrimental effect. Despite its relative disadvantages, RTTY is still popular with many radio amateurs. This mode has now been implemented with commonly available PC sound card software.
To hear what a RTTY signal sounds like, click the sound iconsound_icon

PSK31 is the first new digital mode to find popularity on HF bands in many years. It combines the advantages of a simple variable length text code with a narrow bandwidth phase-shift keying (PSK) signal using DSP techniques. This mode is designed for "real time" keyboard operation and at a 31 baud rate is only fast enough to keep up with the typical amateur typist. PSK31 enjoys great popularity on the HF bands today and is presently the standard for live keyboard communications. Most of the ASCII characters are supported. A second version having four (quad) phase shifts (QPSK) is available that provides Forward Error Correction (FEC) at the cost of reduced Signal to Noise ratio. Since PSK31 was one of the first new digital sound card modes to be developed and introduced, there are numerous programs available that support this mode - most of the programs available as "freeware".
To hear what a PSK31 signal sounds like, click the sound iconsound_icon

HF PACKET (300 baud) radio is a FSK mode that is an adaption of the very popular Packet radio used on VHF (1200 baud) FM amateur radio. Although the HF version of Packet Radio has a much reduced bandwidth due to the noise levels associated with HF operation, it maintains the same protocols and ability to "node" many stations on one frequency. Even with the reduced bandwidth (300 baud rate), this mode is unreliable for general HF ham communications and is mainly used to pass routine traffic and data between areas where VHF repeaters maybe lacking. HF and VHF Packet has recently enjoyed a resurgence in popularity since it is the protocol used by APRS - Automatic Position Reporting System mostly on 2 meter VHF and 30 meter HF.
To hear what a packet signal sounds like, click the sound iconsound_icon

HELLSCHREIBER is a method of sending and receiving text using facsimile technology. This mode has been around along time. It was actually developed by Germany prior to World War II! The recent use of PC sound cards as DSP units has increased the interest in Hellschreiber and many programs now support this new...well I mean, old mode. The single-tone version (Feld-Hell) is the method of choice for HF operation. It is an on-off keyed system with 122.5 dots/second, or about a 35 WPM text rate, with a narrow bandwidth (about 75 Hz). Text characters are "painted" on the screen, as apposed to being decoded and printed. Thus, many different fonts can be used for this mode including some basic graphic characters. A new "designer" flavor of this mode called PSK HELL has some advantage for weak signal conditions. As with other "fuzzy modes" it has the advantage of using the "human processor" for error correction; making it the best overall mode for live HF keyboard communications. Feld-Hell also has the advantage of having a low duty cycle meaning your transmitter will run much cooler with this mode.
To hear what a Hellschreiber signal sounds like, click the sound iconsound_icon

MT63 is a new DSP based mode for sending keyboard text over paths that experience fading and interference from other signals. It is accomplished by a complex scheme to encode text in a matrix of 64 tones over time and frequency. This overkill method provides a "cushion" of error correction at the receiving end while still providing a 100 WPM rate. The wide bandwidth (1Khz for the standard method) makes this mode less desirable on crowded ham bands such as 20 meters. A fast PC (166 Mhz or faster) is needed to use all functions of this mode. MT63 is not commonly used by amateurs because of its large bandwidth requirement and the difficulty in tuning in an MT63 transmission.
To hear what a MT63 signal sounds like, click the sound iconsound_icon

THROB is yet another new DSP sound card mode that attempts to use Fast Fourier Transform technology (as used by waterfall displays). THROB is actually based on tone pairs with several characters represented by single tones. It is defined as a "2 of 8 +1 tone" system, or more simply put, it is based on the decode of tone pairs from a palette of 9 tones. The THROB program is an attempt to push DSP into the area where other methods fail because of sensitivity or propagation difficulties and at the same time work at a reasonable speed. The text speed is slower than other modes but the author (G3PPT) has been improving his MFSK (Multiple Frequency Shift Keying) program. Check his web site for the latest developments.
To hear what a Throb signal sounds like, click the sound iconsound_icon

MFSK16 is an advancement to the THROB mode and encodes 16 tones. The PC sound card for DSP uses Fast Fourier Transform technology to decode the ASCII characters, and Constant Phase Frequency Shift Keying to send the coded signal. Continuous Forward Error Correction (FEC) sends all data twice with an interleaving technique to reduce errors from impulse noise and static crashes. A new improved Varicode is used to increase the efficiency of sending extended ASCII characters, making it possible to transfer short data files between stations under fair to good conditions. The relatively wide bandwidth (316 Hz) for this mode allows faster baud rates (typing is about 42 WPM) and greater immunity to multi path phase shift. A second version called MFSK8 is available with a lower baud rate (8) but greater reliability for DXing when polar phase shift is a major problem. Both versions are available in a nice freeware Windows program created by IZ8BLY.
To hear what an MFSK16 signal sounds like, click the sound iconsound_icon

JT65
is intended for extremely weak but slowly-varying signals, such as those found on troposcatter or Earth-Moon-Earth (EME, or "moonbounce") paths. It can decode signals many decibels below the noise floor, and often allows amateurs to successfully exchange contact information without signals being audible to the human ear. Like the other digital modes, multiple-frequency shift keying is employed. However unlike the other digitalmodes, messages are transmitted as atomic units after being compressed and then encoded with a process known as forward error correction (or "FEC"). The FEC adds redundancy to the data, such that all of a message may be successfully recovered even if some bits are not received by the receiver. (The particular code used for JT65 is Reed-Solomon.) Because of this FEC process, messages are either decoded correctly or not decoded at all, with very high probability. After messages are encoded, they are transmitted using MFSK with 65 tones. Operators have also begun using the JT65 mode for contacts on the HF bands, often using QRP (very low transmit power usually less than 5 watts). While the mode was not originally intended for HF use, its popularity has resulted in several new programs being developed and enhancements to the original WSJT in order to facilitate HF operation.
To hear what a JT65 signal sounds like, click the sound iconsound_icon

Olivia was developed by Pawel Jalocha and is a ham radio digital mode designed to work in difficult (low s/n ratios plus multipath propagation) conditions on HF bands. The signal can be decoded even when it is 10-14 db below the noise floor (i.e. when the amplitude of the noise is slightly over 3 times that of the signal). It can also decode well under other noise, QSB, QRM, flutter caused by polar path propagation and even auroral conditions. Currently the only other digital modes that match or exceed Olivia in sensitivity are some of the WSJT program modes that include JT65A and JT65-HF which are certainly limited in usage and definitely not true conversation capable.

The standard Olivia formats (bandwidth/tones) are 125/4, 250/8, 500/16, 1000/32, and 2000/64. However the most commonly used formats in order of use are 500/16, 500/8, 1000/32, 250/8, and 1000/16. This can cause some confusion and problems with so many formats and so many other digital modes. After getting used to the sound and look of Olivia in the waterfall, though, it becomes easier to identify the format when you encounter it. About 90% of all current Olivia activity on the air is one of the 2 formats : 500/16 and 1000/32.
To hear what an Olivia 500/16 signal sounds like, click the sound iconsound_icon
To hear what an Olivia 1000/32 signal sounds like, click the sound iconsound_icon

DominoEX is a digital mode using MFSK (Multi-Frequency Shift Keying), used to send data (for example, hand-typed text) by radio. MFSK sends data using many different tones, sent one at a time. Each tone element ('symbol') can carry several bits of data. Most other digital modes uses each tone to represent only one bit. Thus the symbol rate is much lower for the same data rate when MFSK is used. This is beneficial, since it leads to high sensitivity with good data rate and modest bandwidth. More importantly, low symbol rates are less effected by multi-path reception timing effects.

Therefore MFSK is ideal for HF operation since it has good noise rejection and good immunity to most propagation distortion effects which adversely affect reception of other modes. MFSK is already used on HF by modes such as MFSK16, ALE, THROB and Olivia, but DominoEX improves on the MFSK types of modes by employing an Incremental Frequency Keying strategy. DominoEX is also a reasonably narrow-band mode along the lines of MFSK16 or RTTY.

A narrow-band application of MFSK presents some challenges. The main problem is that radio transceivers with high stability and tuning accuracy are usually required, since very small frequency steps are used for example when ompared with RTTY. MFSK is also prone to interference from data arriving from different ionospheric paths, and like many modes, it is prone to interference from fixed carriers within the data passband. Forward Error Correction (FEC) can be deployed to reduce errors, but such modes can become slow and difficult to operate or the modes consume an excessive an excessive amount of bandwidth. With DominoEX, a different approach was taken, concentrating on perfecting the design for best Near Vertical Incidence Signal or NVIS reception without requiring FEC. All the inherent MFSK problems are also avoided or much reduced.

DominoEX uses a series of new techniques to counter the general limitations of MFSK. To avoid tuning problems, IFK (Incremental Frequency Keying) is used, where the data is represented not by the frequency of each tone, but by the frequency difference between one tone and the next, an equivalent idea to differential PSK. An additional technique, called Offset Incremental Keying (IFK+) is used to manage the tone sequence in order to counter inter-symbol interference caused by multi-path reception. This gives the mode a great improvement in robustness.

Like Olivia above, there are several variations of the DominoEX mode: DominoEX4, DominoEX5, DominoEX8, DominoEX11, DominoEX16 and finally DominoEX22. The higher the number the faster the speed of transmission so difficult conditions it may be wise to use the slower speed, while good conditions might allow for faster speeds.
To hear what a DominoEX8 signal sounds like, click the sound iconsound_icon
To hear what a DominoEX16 signal sounds like, click the sound iconsound_icon

Contestia is a digital mode directly derived from Olivia but not quite as robust. It is more of a compromise between speed and performance. It was developed by Nick Fedoseev, UT2UZ who is also one of the key developers of the MixW Mult-digital mode software application used by many hams. Contestia sounds almost identical to Olivia, can be configured in as many ways, but has essentially twice the speed.

Contestia has 40 formats just like Olivia. The formats vary in bandwidth (125,250,500,1000, and 2000hz) and number of tones used (2,4,8,16,32,64,128, or 256). The most commonly used formats right now seem to be 250/8, 500/16, and 1000/32.

So just how well does Contestia perform under very weak signal conditions. Surprisingly well as it handles QRM, QRN, and QSB very easily. It decodes below the noise level but experience has shown that Olivia still outperforms Contestia depending on which variation of the modes are used. However, Contestia is twice as fast as Olivia on a given variation of each respective mode. It is an excellent weak signal, conversational, QRP, and long distance digital mode. When using it for keyboard to keyboard conversation under fair to good conditions, it can be more preferable to many hams than Olivia because of the faster speed.

Contestia get it's increased speed by using a smaller symbol block size (32) than Olivia (64) and by a using 6-bit decimal character set rather than 7-bit ASCII set that Olivia does. Because it has a reduced character set and does not print out in both upper and lower case. Some traffic nets might not want to use this mode because it does not support upper and lower case characters and extended characters found in many documents and messages. For normal digital chats that does not pose any problem, but also because of these limitations, Contestia has not seen much use and is more of a novelty mode.
To hear what a Contestia signal sounds like, click the sound iconsound_icon

"WB8NUT helps write article on Digital Modes for World Radio Magazine
In early 2013 I assisted in writing an article on digital modes for World Radio Magazine titled Diving into the Alphabet Soup. A copy of the article in pdf format can be downloaded by clicking this link. It was published in the April 2013 edition of the on-line magazine."

Download Digital Mode Soundcard Software

Digipan - Great PSK31 Software (Freeware)
FLDigi - Great Multi Mode Application and it runs on Windows, MAC OSX, and Linux. Plenty of add-ons and a messaging package (NBEMS) which is very useful for emergency communication (Freeware)
Hamscope - PSK31, RTTY, ASCII, MFSK, Packet and CW (Freeware)
IZ8BLY Hellschreiber - All popular Hell modes (Freeware)
MixW - The soundcard based software that does all the modes! (Shareware - Reasonable)
Stream by IZ8BLY for MFSK (Freeware)


Need an Interface between your Transceiver and the Computer?
WB8NUT recommends the Donner Digital Interface - Simple, Affordable, Easy to connect!
Works First Time - Every Time
Visit Donner Digital Interfaces by Clicking anywhere on this text!

The Predominate USA HF Digital Frequencies

160 Meters
1.838.150 PSK31,
1.890 SSTV

80 Meters
3.580 to 3.620 Data (RTTY, PSK31, Hellschreiber, MFSK16)
3.620 to 3.635 Packet
3.845 SSTV

40 Meters
7.035.150 PSK31
7.037 Hellschreiber, MFSK16
7.076 JT65
7.080 RTTY
7.171 SSTV

30 Meters

10.130 PSK31
10.130 to 10.140 RTTY
10.137 Hellschreiber
10.140 to 10.150 Packet, APRS

20 Meters
14.063.5 Hellschreiber
14.070.150 PSK31
14.070 to 14.095 RTTY
14.076 JT65
14.080 MFSK16
14.100.5 to 14.112 Packet
14.230 SSTV
14.233 SSTV

17 Meters
18.100 to 18.105 RTTY
18.103 Hellschreiber
18.105 MFSK16
18.105 to 18.110 Packet

15 Meters
21.063 Hellschreiber
21.070 to 21.100 RTTY
21.070.150 PSK31
21.076 JF65
21.080 MFSK16
21.100 to 21.110 Packet
21.340 SSTV

12 Meters
24.920 to 24.925 RTTY
24.925 to 24.930 Packet
24.929 MFSK16

10 Meters
28.070 to 28.150 RTTY
28.076 JT65
28.080 MFSK16
28.120.150 PSK31, Hellschreiber
28.680 SSTV
28.690 SSTV - some SSTV repeaters on this Frequency
28.700 SSTV

6 Meters
50.276 JT65
50.680 SSTV

2 Meters

145.500 SSTV - National SSTV Simplex Frequency for FM
145.550 PSK31, Hellschreiber, MFSK16


this was taken from http://wb8nut.com/digital/


for all digital mode software please use : http://ac4m.us/digital_mode_software.html
thanx to Craig AC4M

Thursday, January 28, 2016

ARRL January VHF Contest is here

This coming weekend is the January VHF contest.  Unlike HF contests that fill the bands with stations upon stations, to those who do not participate in the VHF contests these contests go virtually unnoticed as they take place mostly out of site from FM repeater operation that most think of when it comes to VHF.


For those who do weak signal work on VHF, these are weekends the VHF bands, from 6m thru light come alive!!


Many folks don't think they even have the right equipment to get involved or even help out their local VHF operators, but access to the VHF contest may be easier than you think.


Many (if not most) HF rigs these days include 6m.  The 6m band is the lowest of the VHF bands and on 6m you can join in with the VHF excitement!


You can also find some FM operation so your 2m or 70cm mobile rig or HT is sufficient to make contest contacts.   There is actually a FM only class of operation which is trying to encourage more participation.


My favorite class is operating as a rover where I move from grid square to grid square and every time I change a grid I can work stations over again from the new grid.


January VHF contest information can be found here:  http://www.arrl.org/january-vhf


You can read about where I will be during the upcoming contest here http://www.qrz.com/db/K2EZ
If I will be passing someplace near you I would love to work you.  You can track my location here http://aprs.fi/static/?call=K2EZ&z=6 during the contest to find when I am in your area.  Be aware that is a static page so you need to manually refresh to see my position update.


I hope to catch you on the VHF airwaves this weekend!

Thursday, January 14, 2016

Amateur Radio RST System



Readability - Strength - Tone: RST Signal Reports


R-S-T
Numeric Value Readability - R Strength - S Tone - T (cw only)

1 Unreadable Faint signals, barely perceptible Sixty cycle a.c or less, very rough and broad
2 Barely readable, occasional words distinguishable Very weak signals Very rough a.c., very harsh and broad
3 Readable with considerable difficulty Weak signals Rough a.c. tone, rectified but not filtered
4 Readable with practically no difficulty Fair signals Rough note, some trace of filtering
5 Perfectly readable Fairly good signals Filtered rectified a.c. but strongly ripple-modulated
6 Not used Good signals Filtered tone, definite trace of ripple modulation
7 Not used Moderately strong signals Near pure tone, trace of ripple modulation
8 Not used Strong signals Near perfect tone, slight trace of modulation
9 Not used Extremely strong signals Perfect tone, no trace of ripple or modulation of any kind



Notes

Select the signal's most consistent characteristic from each of the R, S, and T columns in the chart. Select the number from the R-S-T Numeric Value (left) column which corresponds to each characteristic chosen. This R-S-T sequence of numbers becomes the RST signal report.

If the signal has the characteristic stability of crystal control, the letter X may be added to the end of the RST report.

Use the letter C to indicate a chirp on the signal.

Use the letter K for key clicks.

"RST is 599" - means that the morse code cw signal being assessed is Readability 5 (perfectly readable), Strength 9 (extremely strong signal), Tone 9 (perfect tone). This is the ultimate (or "perfect") cw signal.

This reporting system may also be used for phone operation by leaving out the Tone (T) portion of the report. For example, a signal of "5 9" means that the phone signal is Readability 5, and Strength 9; a perfectly readable and extremely strong signal. The term "S-9" is also used to report a Strength 9 for an extremely strong signal. If an S-Meter is being used as a basis of the signal report, an S-9 is the notation for 9 (S-Units) on the meter.


thanx for Maxwell at buffalo edu for some information


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RSQ system for Digital QSO's





Tuesday, January 5, 2016

If you build it they will come


That is the radio signals and contacts will come.

For the new ham getting on HF, putting up an antenna can become an obstacle that stands in their way.  HF antennas take space and some bands taking lots of space. There are all sorts of opinions of what is best.  There are all sorts of technical detail such as insulators, wire type, baluns, feedline, etc.  And then there is the problem of where to put it and how to support it.


Often this can cause a sort of paralysis.


So where to start?


A good place to start is to recognize that there is no perfect antenna and that any antenna is better than none.  Also recognize that it can be fun to try something and change it for something else.  The basic construction materials for antennas (wire, feedline, rope) can always be re-purposed from one under performing antenna experiment into another hopefully better antenna.


Also recognize that for basic HF operation with 100 watts, there isn't a need to go overboard with insulators, baluns, etc.  A piece of wood or a PVC plumbing fitting with a couple holes will suffice for a center insulator.  A nylon rope will provide enough insulation at the ends. 


When looking at where to put the antenna keep in mind that dipoles are very tolerant of bends.  When running 100 watts, if you use insulated wire, the wire can be looped over tree branches.  There is no need to make it sit out in completely open space between supports and strait runs don't make much difference.  You will be amazed at what antennas will tolerate.


Don't worry about getting it in the best position getting it highest.  Get something, try it, and improve on it next time.  Inverted V antennas are a great alternative to dipoles as they only require one support.


Don't worry about making an antenna work for all bands.  Focus on one and like 40m which is a good band for some day operation and some night operation.  20m or 15m for more distance although more daytime oriented.  20m or 15m also can be easier because of their smaller size.


The ARRL Antenna book can be a great source of ideas as well as technical reference.


Commercial antennas, while perhaps not as much fun as building your own, can let you get started and some models are multi-band.


Those magic boxes called antenna tuners can also be helpful, but a word of caution here.  While they can match an antenna and make your rig happy, as well as being used in many circumstances without significant degradation, they can also be mis-used.  If used the wrong way such as correcting very high mismatch when using coax can result in most of your power ending dissipated in the tuner and feedline rather than radiated.  For the beginner it is best to use a tuner with commercial antennas designed to work with a tuner such as the (G5RV) or only use the tuner match to antennas that are mismatched no more than 5:1.


In the end though, you can't work them if you don't put up an antenna.  So don't angst over what is best, just put something up to start with, use it, and improve upon it.

Friday, December 4, 2015

Street Lamp QRM?



After many months with severe buzzing on the HF bands in the evenings it looks like there is a promising lead finally. 


The buzzing has been S6 to S9 with the worst being 40m.  It has been especially maddening as sometimes it would randomly stop and the clarity would be amazing.


But what was causing this?  Power lines someplace seemed like a culprit, but where?  Driving around trying to find noise peaks from the mobile wasn't to help as the antenna on the car just wasn't as sensitive as the big antennas at the house and the ignition noise was just as strong as the noise being hunted.


A friend then mentioned how he was having bad noise and found it to be the street lamps on his road.  That after getting the power company to service the lights the bands were once again quiet for him.


So what is up with the lights?  Apparently it is normal during turn on of those popular yellow/orange street lamps for them to make RF noise that lasts a short bit (20 or 40 seconds).


When these lights start to go bad they can sit in a perpetual turning-on state.  They can turn on and as soon as fully on  immediately turn off and then start turning on again.  Or they can sit in a half turned on state.  When neither fully off nor on fully on they make RF noise.


A few days later while listening to 20M in the afternoon with the band sounding clear, the buzzing suddenly started.  A quick look out the window shows it was starting to get dark out.  The street lamp in front of the house was still out but it was that time of day street lights would be turning on.  After 20 seconds or so the buzzing stopped.  Was that a street lamp turning on?  Not sure, none within view of the house are on.  The buzzing starts again, a quick look out the front window and the street lamp in front of the house is just starting to turn on.  Shortly thereafter the buzzing stops, another look at the street lamp and it looks fully on.


Back to the radio, more buzzing starts but is fainter, perhaps a lamp further away?  More listening and the pattern keeps repeating, sometimes stronger, sometime weaker, sometimes overlapping.  But it is a buzzing that occurs for a 10s of seconds and then goes away.  Yes it makes sense, it is the different street lamps coming on in the area. 


Eventually a buzz picks up and doesn't go away expect for the occasional few seconds.  Perhaps this is a faulty light?  It is now dark out, all lights should be on.  The street lamps that can see from the house are all fully on, but are there any in the area not working right?  Its time for a drive.


During a drive around the neighborhood reveals three street lamps stuck in a half on condition, one turning off every time it turns on and two completely off.  A total of 6 faulty lights within a mile.  One of the ones completely off is behind the house and if that is making noise that could be the biggest culprit.


With the pole number recorded for the problem lights and reported to the electric company now we just need to see how long it takes for them to get fixed and see if this resolves the nighttime buzz. 


Keeping our fingers crossed on this one. 
K2EZ

Thursday, September 3, 2015

What is in your GO KIT?


http://www.arrl.org/files/file/A​RESFieldResourcesManual.pdf

http://www.qsl.net/kc0nrk/go-bag​s.html


University of Pittsburgh has an online disaster preparedness https://www.coursera.org/learn/d​isaster-preparedness


candles, medicine, flashlight, paper , pen

what else do you have?


Wednesday, July 22, 2015

QST - YL on front cover KM4HFY


This is wonderful that a YL is on the front cover of QST.

KM4HFY = Megan Brown via W4MSA - Martha Muir

send W4MSA email congratulating Megan and Martha

Let's get more YL's on the front cover of QST.

QRV - we are ready

Friday, June 26, 2015

EME net


for those of you just getting interested in EME - Moonbounce operation,
there is a net operation every weekend where you can obtain additional
information or make schedules. The net starts aprox 1500 GMT on 14.345 Mhz
with 432 and above EME. It is followed by the 2 mtr EME net at aprox 1600/1700 GMT.
EME scheduling from the nets is done with the SKD program. SKD is freeware
developed by W9HLY, N1BUG and AF9Y. Here's the latest version: skd87a.zip (181K Bytes)

The data files for SKD87a are updated every Monday Evening by Brian Manns, W3EME.
You can contact him at w3eme@mtwirefree.net for automatic emailing each week or
you can download it here: vhfsched.skd (aprox 90K Bytes)

taken from af9y.com

Thursday, June 11, 2015

YL - M0HZT net 7.175 BYLARA net


Wednesday, Jenni M0HZT is starting new nets on 40m on 7.175 +/- QRM

from 07.00 – 0900, 11.00 – 13.00 and 20.00 – 2200, using callsign M0BYL

Saturday, June 6, 2015

Raspberry Pi and Amateur Radio (Apps and more)


have a raspberry Pi or want a raspberry PI?

this is the best thing going for now. it is a full blown computer on a 2x2 board
HD audio
HD Video

1GB of memory and FAST

and very little $$$ compared to what you are used to!

here is a link to check it out:rasp pi

software list for ham radio is XXXXXXX

then i will point you to what you can do with it with Ham radio




here are some I found on dxzone
Hamnet on a Raspberry Pi - Initial set up of Broadband Hamnet on a Raspberry Pi....
GNU Radio on Raspberry Pi 2 - Taking the Raspberry Pi 2 for a Test Drive with GNU Radio. Installing ...
ADS-B flight tracker with Raspberry Pi - Build and run your own ADS-B receiver for 100 USD with a Raspberry Pi...
Raspberry Pi SDR Receiver - Get started with SDR using a Raspberry Pi and inexpensive RTL-SDR tune...
D-Star radio access point with Raspberry Pi - Getting your Raspberry PI up and running your D-Star radio kit. This w...
FM broadcast transmitter Raspberry Pi - This simple hack turns your Raspberry Pi into a powerful FM transmitte...
Raspberry Pi WSPR beacon - How to build a simple WSPR beacon using the Raspberry Pi for the trans...
RemoteQTH with Raspberry - Software running on the Raspberry PI, Control up to 8 arduino rotators...
SDR Server with Raspberry Pi - Setting up a Raspberry Pi as a SDR Server with RTL-2832U USB dongle ...
WSPR beacon on Raspberry Pi - Settng up a 40 meter WSPR beacon based on Raspberry Pi by VA3PAW.


ham radio/raspberrey pi>hamradioscience


to get a raspberry pi to work with linux (raspbian) the drivers were already there for many ham radio apps

to get the audio working for raspberry pi and linux:

install alsa a mp3 tool and wav to mp3 conversion:

> sudo apt-get install alsa-utils
> sudo apt-get install mpg321
> sudo apt-get install lame

enable sound module, then reboot
> lsmod snd-bcm2835
> sudo modprobe snd-bcm2835

then just use
>aplay xxxx.wav


there are a few Ham Radio Linux distributions for Raspberry pi:

1. KB1OIQ Andy ham radio for linux>KB1OIQ
2. raspberryconnect>RASPBERRYCONNECT
3. raspberrypi.org>RASPBERRYPI
4. ubuntumate> ubuntumate
5. linux.org.au>australian linux group



for digital modes ham radio and linux you need a new radio or some type of tnc or analog to digital converter.

so there are a few: Rigblaster - by west mountain radio or signlalink by www.tigertronics.com/slusbmain.htm

Ham radio deluxe is only for windows you CAN run wine but good luck people say it works ok
but I prefer not to run wine ( I might as well run windows)
so programs i would suggest:
FLDIGI for most digital modes CW, rtty, psk
ECHOLINK echolink
VOACAP
ALARMEJT>alarmjt
FREEDV>that allows any SSB radio to be used for low bit rate digital voice.
MMTTY > rtty
MMSSTV> slow scan tv
WSTOOLS>Linux version of the JT44 and FSK441 communications protocols, usually described together as WSJT.
HAMLIB>HAMLIB LINK
ICOM> This program controls ICOM radio transceivers and receivers with the CI-V option.








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