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An aggregate of Ham Radio related news.
  • QSO Transcriber for iPhone — Visual Support for Live Voice QSOs

    The following is a message from the creator of QSO Transcriber:

    My name is Poul Laustsen, callsign OV9PL, and I’m a radio amateur from Denmark.

    I’ve just released an iPhone app called QSO Transcriber, which I originally started building because of a problem I experienced myself as a relatively new radio amateur.

    During voice QSOs, I found it surprisingly difficult to listen carefully, remember a callsign and signal report, think about what to say next, and operate the radio at the same time. I also experienced some of the microphone anxiety that many newer operators will probably recognize.

    QSO Transcriber is intended as a visual support and confidence tool during real radio QSOs.

    It can:

    • Provide live transcription of voice QSOs
    • Detect and highlight possible callsigns and signal reports
    • Record QSOs for later review
    • Let the operator listen back and correct information before saving it
    • Export QSO information in ADIF format
    • Process transcription locally on the iPhone rather than sending QSO audio to a cloud transcription service

    And a lot more, but it would be quite extensive to have it all here:-).

    The goal is not to replace listening, learning or normal operating skills. It is meant to reduce some of the information pressure while operators gain experience and confidence on the air.

    I have deliberately tested the app using real radio audio rather than clean studio speech, including weak signals, noise, accents and normal conversational QSOs.

    QSO Transcriber is now available in the Apple App Store.

    App Store:
    https://apps.apple.com/us/app/qso-transcriber/id6811510439

    Website:
    https://qsotranscriber.com/

    Source: OV9PL

  • Nexus 1.22.0 Shows Solar Flare Absorption the way NOAA Sees it

    The following is a press release from hamradiotools.io:

    HAMRADIOTOOLS.IO, Nov. 8, 2026. Nexus, the free, open-source (GPL-3.0) amateur radio station program by Seth McCallister, KD9TAW, has released version 1.22.0. During M- and X-class solar flares, Nexus now draws NOAA's D-RAP (D-Region Absorption Prediction) map on its flat map, globe and 3-D globe. Rings around the point under the sun show, band by band, where HF is weakened and where it is out. A flare chip gives NOAA's start and peak times, which bands are out under the sun and at the operator's QTH, and how long until HF recovers. Below M class the map stays quiet.

    When NOAA issues a geomagnetic storm watch, Nexus counts it down and reports the arrival only once the solar-wind monitor at L1 measures it.

    The release also tells operators which way round the world a path goes. Using the ITU-R P.533 propagation engine, the Path card suggests short path or long path, with a beam heading. The release notes say this is advice from a monthly-median model. The long path is modelled and is never called more than "possible."

    Nexus 1.22.0 also adds a Russian translation by volunteer translator loloka.

    Existing users: in-app updating did not work on the stable channel before this release. Install 1.22.0 once from the download page, and later updates will come through Nexus.

    Nexus is free for Windows, macOS, Linux and Raspberry Pi.

    Release notes: https://github.com/kd9taw/Nexus/releases/tag/v1.22.0
    Download: https://hamradiotools.io

    Source: hamradiotools.io

  • Cadenza Brings Morse Listening and Sending Practice to iOS and Android

    The following is a press release from Cadenza:

    Cadenza is a Morse code training app from independent developer Ivan Terekhin of Trifoil Trailblazer. Available for iPhone, iPad and Android, it combines introductory character practice with exercises for people preparing to use CW on the air.

    The trainer uses the Koch method with Farnsworth spacing. Learners begin with two characters, hear them at speed with wider gaps, and add more as their accuracy improves. Practice works offline and does not require an account.

    The free version includes alphabet, number and punctuation training, a reference covering prosigns and Q-codes, a two-way Morse translator, and a microphone decoder for clean Morse tones. Daily challenges and progress tracking are also included.

    Optional Cadenza Pro adds callsign practice, simulated QSOs, pileups, head copy and sending practice. Users can create custom practice lists for callsigns and contest exchanges. Sending exercises support an on-screen key or a straight key or paddle connected through a compatible USB or Bluetooth keyboard adapter, such as VBand or Vail.

    Cadenza is free to download, with optional monthly, annual or lifetime Pro purchases.

    Website: https://trifoiltrailblazer.com/en/cadenza
    App Store: https://apps.apple.com/app/id6785429210
    Google Play: https://play.google.com/store/apps/details?id=com.trifoiltrailblazer.cadenza

    Source: Cadenza

N4UN Amateur Radio
BASE 40 Flight October 8, 2009 PDF Print E-mail
Written by Administrator   
Friday, 09 October 2009 09:19

BASE 40 was successfully completed today.

Launch was about 8 minutes late in a light rain. 

Launch at 1218 UTC from southwest corner of track around football field.  Had good visual of the ascent for nearly ten minutes.

Burst at 88000 feet at 1319 UTC (average ascent speed of 1440 ft/min).  Occurred over the southwest corner of Greenfield, IN. 

At 62000 feet at 1323 UTC a catastrophic event occurred during post-burst chaos.  The APRS unit remained attached to the parachute, but one of the swivel connectors opened and the remaining string was cut by the carbon fiber tube released the 900 MHZ command pod, DominoEX, geiger counters, video cameras, and photometers.  With no chute, these boxes landed in a field southwest of Knightstown and northwest of Carthage, IN.  Impact occurred at 1334 UTC and the flight data recorder indicated a speed of about 48 miles/hour 200 feet above the ground.  Maximum descent speeds in the free fall reached 120 miles/hour.

With the reduced load, the parachute and APRS unit landed east of Richmond, IN at 1410 UTC in a soybean field about 2.5 miles east of the Indiana-Ohio state line between US 35 and I-70.

I will examine the video for additional details on the separation event.  This initial analysis comes from flight data and analysis of the payload strings.

Thanks again for your support,
Howard

P.S. - I know that Bill Brown would appreciate any feedback from those that attempted to receive the Domino EX signal.

 

 
BASE 34 Flight March 12, 2009 PDF Print E-mail
Written by Administrator   
Monday, 16 March 2009 11:53

BASE 34 was successfully completed today.

Launch: 13:52 UTC from DePauw
Burst: 15:20 UTC at 103,800 feet
Landing: 16:12 UTC between Potsdam and Laura, Ohio (39deg 58.78 min North, 84 deg 24.77 min West)

We had a visual sighting on the descent for the last two minutes. Smooth landing in the top of four trees about 60 feet above the ground. Retrieval was accomplished with the EZ Hang slingshot system using the tennis ball as the projectile. (Only took 4 attempts, with the first two being miserable failures due to operator error by me.)

The StratoStar system sent all the flight data to the mobile tracking station in real time.

Landing support from Ron, N9QGS, and Justin,W1IX.

Additional details will follow on www.depauw.edu/acad/physics/base

Howard
Last Updated on Monday, 16 March 2009 11:57
 
BASE 32 Flight January 13, 2009 PDF Print E-mail
Written by Administrator   
Thursday, 15 January 2009 17:01

The BASE 32 flight was a success. Launch at 16:20 UTC from DePauw campus (39.64
North, 86.86 West) by a rookie crew in 20 mph winds. Average ascent rate of 1470
feet/min. Burst at 17:18 UTC 85,000 feet. Landing at 18:02 UTC at 39.774
degrees North and 85.055 degrees West longitude. Flight heading 84 degrees from
launch to landing. Great circle distance 97 miles.

Recovery made by Justin Munger, W1IX.

Excellent realtime flight data from student experiments.

Details to follow on the website: www.depauw.edu/acad/physics/base

BASE 33 is still on schedule for Saturday 17 January.

Howard
 
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ARRL News

American Radio Relay League | Ham Radio Association and Resources
The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U.S. with news, information and resources.
  • A Century-Plus of Radio Innovation: The 102nd ARRL Handbook is Now Available

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