ARLA/CLUSTER: 60ª Aniversário da Radio-baliza OZ7IGY em 40,071 MHz e a sua nova vida na plataforma "Next Generation Beacons"

[João Costa > CT1FBF]

[image: oz7igy]
On 30 March 2017 the OZ7IGY beacons turn 60 years old.

The 60th anniversary is being marked by running the NACs of March from the
OZ7IGY QTH: Slettebjerg, JO55WM, with the call sign OZ7IGY. Would you like
to be one of our operators? Or to join us at our open house party? Click
here to read much more. <http://www.oz7igy.dk/event-log/>

OZ7IGY – 60th anniversary and 40 MHz beacon now on Next Generation Beacons
platform

On 25 March 2017, the 40 MHz OZ7IGY beacon was migrated to the Next
Generation Beacons platform http://www.rudius.net/oz2m/ngnb

The beacon was switched on at the 60th anniversary event for OZ7IGY – the
actual birthday is 30 March 2017 making it the oldest ham radio beacon
still alive.

The 40 MHz beacon is now frequency and time locked to GPS.

The sequence is timed to start at 00 second sending PI4 followed by a short
pause then CW ID sending call sign and locator, then pause and carrier
until next cycle. The nominal frequency remains the same, i.e. 40,071 MHz.

To decode PI4 tune your receiver to 800 Hz below the nominal frequency,
just like you do when you want to decode a normal CW signal at 800 Hz. On
most radios this is a USB dial of 40.070.200. The output power is 20W into
an omni-directional halo antenna.

This completes the upgrading of the 12 beacons at OZ7IGY transmitting from
28 MHz to 24 GHz.

PI4 is a digital modulation (MGM) specifically designed with beacons and
propagation studies in mind.

PI4 decoder download: http://www.rudius.net/oz2m/software/pi-rx

PI4 encoding examples in Arduino C, Atmel C, Delphi Pascal, Microsoft
Visual Basic and Microsoft C++: http://www.rudius.net/oz2m/ngnb/software.htm

PI4 online encoding and frequency calculation:
http://www.rudius.net/oz2m/ngnb/pi4encoding.php

PI4 specification: http://www.rudius.net/oz2m/ngnb/pi4.htm
PI4 is a cousin of JT4, JT9 and WSPR.

OZ7IGY homepage: http://www.oz7igy.dk

73

Bo, OZ2M
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