Thursday, October 25, 2012

Tropical Storm SANDY

Tropical Storm SANDY
Thursday, October 25, 2012 17:30:00 UTC

Government Forecasters Warn of 'Frankenstorm'...
http://www.hpc.ncep.noaa.gov/discussions/hpcdiscussions.php?disc=pmdepd

TROP STORM WARNINGS: FLORIDA..
.http://www.nhc.noaa.gov/storm_graphics/AT18/refresh/AL1812W5_NL+gif/204249W5_NL_sm.gif

Computer Models...
http://icons.wunderground.com/data/images/at201218_ensmodel.gif

Threat for mid-Atlantic, Northeast from hurricane Sandy...
http://www.washingtonpost.com/blogs/capital-weather-gang/post/mega-storm-threat-growing-for-mid-atlantic-and-northeast-early-next-week-from-sandy/2012/10/24/0b7f1148-1e06-11e2-9cd5-b55c38388962_blog.html

BIG WINDS, BIG RAINS FOR NYC?


Extraordinary Circumstances Needed for Historic Storm...
http://www.accuweather.com/en/weather-news/extradinary-circumstances-need/618156
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Friday, October 12, 2012

Ultimate QRSS Transmitter Kit

The ultimate QRSS Transmitter Kit is produced by Steve G0XAR and Hans G0UPL in 30, 40 and 80m versions. The kit contains the PCB, LCD, programmed micro controller and all board-mounted components. Download the instruction manual using the link above. The PCB is quite compact and moderate care is required in the construction. A rich array of functionality is provided by the design; please read the instruction manual to understand the facilities provided. Builder modifications will be shown on this page as they are developed!

Note for WSPR users: the 30m kit has a 10.140MHz crystal which is suitable for either the QRSS sub-band or the WSPR frequency. Therefore on 30m the kit can be used as a standalone WSPR transmitter. On other bands you may need to supply a suitable crystal for the WSPR frequency on that band. Alternatively you could use this kit in the AF output mode, fed into a conventional SSB transmitter set to the frequency of your choice.

The kit supports the following modes:
  • QRSS mode (plain on/off keyed slow CW)
  • FSK/CW mode (frequency shift keyed slow CW)
  • DFCW mode (dual frequency CW)
  • WSPR mode (Weak Signal Propagation Reporter)
  • Slow-Hellschreiber (frequency shifted slow-Hell)
  • Full-speed Hellshreiber
  • Half-speed (“DX”) Hellshreiber
  • CW (plain CW)
  • Customisable FSK patterns
Other features:
  • 24-character LCD + two-button user interface
  • User-programmable (callsign, message, speed, FSK, mode, etc.), settings stored in EEPROM
  • GPS interface, for locking the frequency in slow-speed modes
  • On-chip generation of WSPR encoded message (no PC required)
  • WSPR maidenhead locator can be generated from GPS-derived latitude/longitude
  • Selectable “frame” size, for stacked QRSS reception
  • Plain CW callsign identifier at selectable interval
  • Produces 150mW RF output, or AF output for driving an SSB transceiver
  • Higher output power by additional PA transistor and/or higher PA supply voltage
 For more info; Click Here
http://www.hanssummers.com/qrsskitmm.html
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Friday, October 5, 2012

The MST (Minimalist Sideband Transceiver)

The MST (Minimalist Sideband Transceiver) is an easy to build and fun to use single sideband QRP transceiver for the 40M or 80M amateur bands. The MST transceiver follows a minimalist design making it inexpensive and simple to build yet still delivering excellent performance and being a pleasure to operate.

The MST PCB contains a complete transceiver except for a VFO. You can add a VFO of your own, as long as it has the correct frequency range and drive level, but to obtain best results it should be used with the companion DDS VFO. The DDS VFO offers drift free performance and features a clear backlit LCD display, selectable frequency steps and programmable IF offset.
MST Features:
1.Complete SSB transceiver on a single PCB (just add a VFO).
2. Superhet receiver using a 4 pole 10MHz crystal filter.
3. 5W PEP minimum power output using a rugged power MOSFET output stage.
4. Unwanted sideband suppression is typically 40dB.
5. All spurious transmit outputs below -45dBc.
6. AF and microphone gain controls.
7. Easy to adjust and set up.
8. Front panel LED transmit power and modulation indicator.
9. Plenty of audio output to drive a loudspeaker.
10. High quality double sided PCB with ground-plane, solder mask and silk screen.
11. Simple and easy to build using all through hole components.
12. No complicated coil winding required. Uses inexpensive commercial coil assemblies for tuned circuits.

DDS VFO Features:
1. Stable frequency no more drift!
2. Simple to operate using a single rotary encoder control with press button switch.
3. Bright 16 character by 2 line LCD display. Can be used with non-backlight display to reduce current consumption.
4. Output frequency range of 1MHz to 10MHz.
5. Selectable 1KHz, 100Hz or 10Hz frequency steps.
6. Tuning lock control.
7. Displays power supply voltage.
8. Programmable IF frequency. Ensures the displayed frequency is the same as the transmitted frequency.
9. Programmable IF offsets: Minus, Plus, None.
10. Draws only 80mA at 13.8V DC (with LCD backlight).
11. Spurious outputs at least -45dB.
12. Typically 300mV pk-pk sine wave output.
13. High quality double sided PCB with ground plane, plated through holes, solder mask and silk screen.
14. Simple and easy to build using through hole components apart from one SMD chip. To assist constructors the PCB comes shipped with the SMD chip already installed.




Reviewing and testing the ozQRP.com MST400 40m SSB QRP transceiver kit. Link http://www.ozqrp.com/index.html
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Tuesday, October 2, 2012

Airlink Express Digital Mode Software

Airlink Express is a user friendly digital mode software package for the Amateur Radio Operator. The software is compatible with Microsoft Windows XP, Microsoft Windows Vista, and Microsoft Windows 7. It offers PSK, MFSK and RTTY digital modes with logging and macro capabilities. If you have ever used the Digipan software you will be immediately familiar with Airlink Express.
With the release of Windows Vista and Windows 7, Microsoft introduced a new sound architecture. Airlink Express is developed to support this new sound architecture, yet it maintains complete backward compatibility with Windows XP. Airlink Express brings back the familiar volume slider interface you’ve become used to from older Windows versions.
The DSP engine used in Airlink Express is MMVari by Makoto Mori, JE3HHT. This engine is very flexible and decodes as well, if not better, than any other soundcard mode engine currently available. It is used by many other software products like Logger32 and the N1MM contest logger.
FEATURES
These are just some of the features available in Airlink Express:
Automatic Multi Channel Display with PSKReporter capability
Country, Continent, Distance and Bearing Information
PSK, QPSK, MFSK and RTTY
Radio Control (CAT)
Center Bandpass Tuning
True FSK Keying
Macros
Bandpass Filters
Logging with ADIF Import and Export
Replay Last 60, 30, or 15 Seconds
Error free sending and receiving text and binary files (using ARQ)

Airlink Home Page; Click here
http://www.airlinkexpress.org/index.html

Download version 2.5.2.732
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My Stamp Collecting Blog

My Stamp Collecting Blog

Counter Added January 1, 2011

free counters

HOW TO READ PROPAGATION NUMBERS

The A index [ LOW is GOOD ]

  • 1 to 6 is BEST
  • 7 to 9 is OK
  • 11 or more is BAD

Represents the overall geomagnetic condition of the ionosphere ("Ap" if averaged from the Kp-Index) (an average of the eight 3-hour K-Indices) ('A' referring to amplitude) over a given 24 hour period, ranging (linearly) typically from 1-100 but theoretically up to 400.

A lower A-Index generally suggests better propagation on the 10, 12, 15, 17, & 20 Meter Bands; a low & steady Ap-Index generally suggest good propagation on the 30, 40, 60, 80, & 160 Meter Bands.

SFI index [ HIGH is GOOD ]

  • 70 NOT GOOD
  • 80 GOOD
  • 90 BETTER
  • 100+ BEST

The measure of total radio emissions from the sun at 10.7cm (2800 MHz), on a scale of 60 (no sunspots) to 300, generally corresponding to the sunspot level, but being too low in energy to cause ionization, not related to the ionization level of the Ionosphere.

Higher Solar Flux generally suggests better propagation on the 10, 12, 15, 17, & 20 Meter Bands; Solar Flux rarely affects the 30, 40, 60, 80, & 160 Meter Bands.

K index [ LOW is GOOD ]

  • 0 or 1 is BEST
  • 2 is OK
  • 3 or more is BAD
  • 5 is VERY VERY BAD

The overall geomagnetic condition of the ionosphere ("Kp" if averaged over the planet) over the past 3 hours, measured by 13 magnetometers between 46 & 63 degrees of latitude, and ranging quasi-logarithmically from 0-9. Designed to detect solar particle radiation by its magnetic effect. A higher K-index generally means worse HF conditions.

A lower K-Index generally suggests better propagation on the 10, 12, 15, 17, & 20 Meter Bands; a low & steady Kp-Index generally suggest good propagation on the 30, 40, 60, 80, & 160 Meter Bands.

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