Video:YouTube/Roberts Shed

As most of you will know I have spent a lot of time mucking about with PMR446 radios over the years, indeed I remember buying my first pair of Goodman’s Trackers back in 1999!!!!

PMR446 can be fun, trying to get the most out of the small amount of power and tiny antennas, and as my world record contact in 2003 into Holland from the North East of England shows (LINK) you really can get some amazing distances on standard equipment. However some people do like to mod their radios and one of the simplest mods is to attach an external dipole antenna. This is what you will see in this interesting video. 

One thing that puzzles me about this video… take a note of the frequency on the guys receiver when he is testing his PMR446 radio on CHANNEL 4…….?????????
If you would like more information on PMR446 see my archived website HERE which has lots of information about long distance contacts and mods to PMR446 radios. 
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The 10th SpaceX International Space Station cargo resupply mission delivered investigations to study human health, Earth science, and weather patterns last Thursday. It also carried a new Ericsson 2-meter handheld radio to replace one that failed a few months ago, disrupting the Amateur Radio on the International Space Station (ARISS) program. The VHF radio in the Columbus module was used for school group contacts and for Amateur Radio packet, temporarily relocated to UHF after the VHF radio failure. ARISS International Chair Frank Bauer, KA3HDO, said the just-arrived Ericsson radio will, at some point, be installed in Columbus, replacing the Ericsson UHF radio now supporting APRS packet and some school contacts. Bauer made it clear that the new Ericsson transceiver is an interim measure for ARISS.

“ARISS is making great progress on the development of the new interoperable radio system that we hope to use to replace our aging radio infrastructure in the Columbus module and the Service module,” he said. “The hard — and expensive — part of this effort is just beginning, with testing and human [spaceflight] certification on the horizon.” ARISS was able to shift school contacts from NA1SS to the Kenwood TM-D710 transceiver in the Russian Service Module. Cosmonauts use that radio to carry out their ARISS school contacts from RS0ISS.

Bauer thanked all of ARISS’s partners, which include ARRL and AMSAT, as well as individuals and entities that have donated to the program. In December, ARISS announced a “notable contribution” from the Quarter Century Wireless Association (QCWA) to help support development and certification of new ISS radio hardware.

The Ericsson MP-A VHF handheld that ISS crew members had used to speak via Amateur Radio with students and educational groups around the world for more than 16 years began displaying an error message last fall, rendering it unusable. ARISS has said ARISS’s new JVC Kenwood TM-D710GA-based radio system, once on station and installed, will improve communication capability for students scheduled to participate in educational contacts and related activities. The new system also will allow greater interoperability between the Columbus module and the Russian Service Module.

In 2015, ARISS kicked off its first fundraising program, after having relied on support from NASA, ARRL, AMSAT, and individual donors and volunteers to cover the costs of day-to-day operations and spaceflight equipment certification. NASA budget cutbacks made it less certain that ARISS would be able to cover its operational expenses going forward. ARISS leadership initiated the fundraising effort with the goal of securing greater financial stability. TheARISS website has more information on how to support the program. — Thanks to AMSAT News Service, ARISS

Source:ARRL

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Equipment

EXPERIMENTAL SWRX

EXPERIMENTAL SWRX

January 26, 2017
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The Stampfl receiver is still in its experimental stadium and is not, comparable to a KWZ-30, Reuter or Perseus receiver. But an Assembly kit for the… Read more

 

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Showing how the OM-Power Automatic amplifiers like the OM-2500A, OM-4000A, can control the selection of up to ten antennas driving an antenna switch and up to ten filters. A Vector Network Analyzer, Array Solutions’ VNA UHF is plotting the S21 (Filters Insertion Loss) continually.

 

The OM2500A linear amplifier is designed for all short wave amateur bands from 1.8 to 29.7 MHz (including WARC – bands ) and all modes. It is equipped with the ceramic tetrode FU-728F.

 

The advantages of OM2500A:

  • Automatic switching between bands
  • Automatic tuning with the band according to segments
  • Automatic switching of band pass filter
  • Automatic switching of the antenna switch
  • The possibility to use 2 different antennas within one band or segment
  • Full compatibility with
    • – ICOM
    • – YEASU
    • – ELECRAFT
    • – Ten-Tec Orion
    • – Kenwood
    • – Icom transceiver protocol using by microHAM devices, CI-V output (MK II, MK2R, MK2R+, etc)

 Specifications of the OM-2500A:

Frequency coverage:                     Amateur bands 1.8 – 29.7 MHz including WARC

Power output:                                     2500 W in SSB and CW

                                                            2000 W in RTTY, AM and FM

Driver Power:                                     60 to 80 W for full Output Power

Input impedance:                             50 Ohm VSWR < 1.5 : 1

Output amplification:                     15 dB

Output impedance:                             50 Ohm unbalanced

Maximum output SWR:                     2:1

SWR protection:                             Automatic switching to STBY , when reflected power is 350 W or higher

 

Intermodulation distortion:             32 dB below nominal output

Suppression of harmonics:             < -50 dBc

Tube:                                             FU-728F Ceramic tetrode

Cooler:                                             Centrifugal blower + axial blower

Power supply:                                      2 x configurable for 220, 230 or 240 V AC – 60 Hz one or two phases

Transformers:                                     Two  toroidal transformers 2.0 kVA each

Protection circuits:                             – SWR too high

                                                      – Anode current too high

                                                      – Screen current too high

                                                      – Grid current too high

                                                      – Mistuning of the power amplifier

                                                      – Soft start for protecting your fuses

                                                      – “Switch –on blocking“ at top cover removal

Bar graph indications:                     – Power output – bargraph 50 LED

                                                      – Reflected power – bargraph 20 LED

                                                      – Current at screen ( Ig2 – bar graph 10 LED )

                                                      – Anode voltage, anode current, tuning – bargraph 30 LED

LED indicators:                             – Control grid current ( Ig1 – 2 LED )

                                                      – WAIT – Preheating of tube (180 sec )

                                                      – STBY– Standby

                                                      – OPR – Operating condition

                                                      – FAULT – failure, switching off for about 4 seconds

                                                      – Inhibit – operating condition

                                                      – ANT 1 – which antenna is in use

                                                      – ANT 2 – which antenna is in use

                                                      – UP – DWN – Listing in menu

                                                       – MAN – Manual operating

                                                       – AUTO – Automatic operating

                                                       – TUNE – Tuning

                                                       – ANT – Antenna selection

Parameters:                                      485 mm (19.1″) W x 200 mm (7.9″) H x 455 mm (17.9″) D

Weight:                                              40 kg (88 lb)





News


Equipment

EXPERIMENTAL SWRX

EXPERIMENTAL SWRX

January 26, 2017
No comments

The Stampfl receiver is still in its experimental stadium and is not, comparable to a KWZ-30, Reuter or Perseus receiver. But an Assembly kit for the… Read more


 

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Check out this video on the Windom 40 Antenna from Chameleon Antenna. This antenna is an off center dipole that was specifically designed for 40, 20 and 10 meters. In the right condition, an antenna tuner is not needed for these three bands. It is an extremely lightweight antenna and extremely quick to deploy.

Antenna

E-Z-O Antenna

E-Z-O Antenna

June 09, 2016
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A Successful Alternative to the Cubical Quad he revolutionary antenna you see pictured, the E-Z-O, was created by N8PPQ as the result of his efforts t… Read more

VHF

Yaesu FT 550L

Yaesu FT 550L

March 15, 2015
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  Version 2.00 NEW FEATURES Updated the Memory Book to include eight customizable Memory Groups Updated Scan Band selection “ALL BAND” scans both… Read more

Wouxun KG-UVD1P

Wouxun KG-UVD1P

August 29, 2015
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Wouxun KG-UVD1P Description of Features 1. 1750 Hz Burst Tone 2. DTMF Encoding Function 3. Working Mode :vhf tx-uhf rx or uhf tx-vhf rx can be set fre… Read more

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Contesting

KL7RA in hospital

KL7RA in hospital

November 13, 2015
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Photo: K3LR and KL7RA “Rich, KL7RA, is under care for suffering a heart attack.  This unfolded before the Sweepstakes CW contest – but he… Read more

 

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The main features of JT65-HF HB9HQX-Edition 4.7

Clearly arranged mainwindow with 6 additional windows:

Use menu Windows to open.

  • QSO Exchange: Shows a separate list of all own QSO exchange messages with timestamps.
  • Information: About the selected station, Grid and DXCC, extracted from the log database. Menu “Lookup” to open the internet browser for consulting the database of “QRZ.COM” (and/or others). The topmost row contains 3 edit fields for inserting CQ and ITZ zones as well as the State in the logging window.
  • Statistic: Information about QSOs, stations, worked grids and dxcc countries.
  • Grids on map: Shows worked grids on “Google Static Maps” with 5 zoomed windows: Europe, Asia, USA, Australia and China.
  • Raw decoder: Shows all decodes with or without messages (only for test purposes).
  • Background: Hide desktop icons to improve screenshots.

Two windows are used to configure the program or change settings. – The window Configurationinterrupts the program (e.g. the display of time and date is stopped). – The window Settings is the replacement of the menus “Settings” and “Decoder”. You can let it open.

Easy to use, (semiautomatic) one click on Rx-List and/or buttons (Hit Enter key, to activate a button which has the focus) with following features:

  • Quick Multidecoder from 170 Hz … 2430 Hz (-1100 Hz … +1160 Hz).
  • Use audio frequencies as absolut values or as DF values (delta frequency from 1270 Hz), e.g. on the ruler above the waterfall display and in the Rx-List.
  • A single click with the right mouse button in the waterfall display sets the rx frequency (in singledecoder mode).
  • A single click with the left mouse button sets the tx frequency.
  • Rx-List with Tx-messages and additional informations (new station, grid or dxcc)
  • Button Copy to save the whole Rx-List in the windows clipboard, e.g. for inserting in a MS-Word document or in a text editor.
  • Descending or ascending order of frequencies in the Rx-List.
  • Descending or ascendig order of time (UTC) in the Rx-List. New entries on top or bottom of the list.
  • Menu: Edit (Edit Dial QRG and Edit Free Text)
  • A single click with the right mouse button on a row in the Rx-List prepares a QSO.
  • A single click with the left mouse button prepares and starts a QSO.
  • Automatically checks for duplicate new DXCC and new grid (different colors in RX-List).
  • Display of azimuth and distance (calculated form grid squares in km or mile).
  • Display of name of operator (if available) for use in “Free Text” messages.

Optional:

  • For corrupted signals: KVASD Koetter Vardy Algebraic Soft-decision Decoder. KVASD need a separate installation. To do that, open the window Configuration, tab KVASD and read the EULA.
  • Call labels of calling stations in waterfall display.
  • Band- and timestamp labels in waterfall display.
  • Acoustic alert (in morse code) after decoding. Note: This feature uses a separate sound device!
  • Checkbox “Fix Tx DF” for split mode in JT65.
  • Checkbox “Automatic Adjust DT” (same time as partner station, not recommended).
  • Important feature: Synchronizes in short time intervals the program time with an internet timeserver (SNTP).
    If you synchronize the system time with a SNTP service, like Meinberg or Dimension 4, disable this addidional synchronizing process.
  • Spots heard calls and grids to pskreporter.info.
  • Save all sent and received messages (decodes) in one text file per day.
  • Real time upload to eQSL.cc just before logging a QSO.
  • Real time upload to HRDLOG.net.
  • Real time upload to ClubLog.org.
  • Generates the file JT65hf-log.csv to cooperate with the JT65-HF Image Controller from JQ1HDR.
  • Save the last 50 rows of the Rx-List in a textfile. This option is useful, if program crashes or freezes, you can quickly restart the program, without loss of the last entries in the Rx-List
  • All settings are saved in a database (config.sqlite), but all default values are saved direct in the program code. The installer don’t delete or overwrite this database, so you can install a new version without any lost of individual settings.
  • Import text files, ADIF logfiles or MixW logfiles containing calls and names.
  • PTT via COM port: RTS or DTR line. But you can use VOX instead of PTT, e.g. if RS232 device is absent.

All imported and logged QSOs are saved by default in the JT65-Log (jt65-Log.sqlite database).

  • Edit logged QSOs (use Filter(s) and/or ordering to edit your logged QSOs).
  • ADIF: Import/Export log files (also used for eQSL.cc and LotW).
  • MixW2: Import/Export log files.

Selection of one of 10 different logdatabases or logfiles:

  • JT65-Log (jt65-Log.sqlite) with edit, import and export functions (default)
  • HRDLogbook (HRD5 and HRD6) logdatabases (MSACCESS and MySQL)
  • Mycall.mdb (DXKeeper logdatabase)
  • Mycall.sqlite (Log4om logdatabase)
  • MixW2 logfile (*.log)
  • Logger32 (Logger32.exe) + JT65-Log (for statistics)
  • WSJT-X (wsjtx.log and wsjtx_log.adi)
  • Swisslog for Windows version 5.95 (and higher). Run Swisslog and choose menu “Options” > “Digital Modes-Interface” and mark “JT54-HF HB9HQX Edition” to activate the communication between both programs. Note: You should register Swisslog with menu “Help” > “about…”, tab “Register”. Every time, start Swisslog first.
  • TRX-Manager (has his own CAT control)
  • ADIF logfile Direct use without import in the JT65-Log.

Optional CAT control:

  • OmniRig. (OmniRig must be installed and configured prior to using this feature).
  • Hamlib 3. (Hamlib 3 is on board. No need to install it on your notebook pc)
  • Ham Radio Deluxe (HRD5 and HRD6).
  • CI-V Commander (DXLab).
  • TRX-Manager (has his own logging program). Use the file “bandplan_jt65.csv” instead of the default file “bandplan.csv” in the directory “…AppDatalocalTRX-ManangerMisc”.
  • If CAT control: PTT via CAT command or COM port (RTS or DTR).
    The program calculates the appropriate transverter QRG.

 

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