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VK2IO Australia flag Australia

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VK2IO is an amateur radio station 25km NW of the city of Sydney, NSW, Australia. Locator is QF56LG.
First licenced in 1976 as a Novice (now called Standard licence), I progressed to the Advanced licence in the following year and held the callsign VK2DAA. During a stint in England I held the callsign G0ODA and ran the GB7DAA packet BBS from 1990 for 2 years. In 1999, to reflect my interest in digital modes, I switched to the current callsign, IO being a common abbreviation for Input/Output in connection with digital data streams. In 2014, my G0ODA callsign was reacquired.

For the latest information on my recent activities check out my blog.
​My home station logbook is online here. Portable station log here.

VK2IO currently runs the following services:

  • EchoLink node 2509 (offline)
  • HF APRS IGate
  • HF packet BBS/node/digipeater
  • VHF packet BBS/node/digipeater

EchoLink node (currently offline)

Node 2509 is a duplex node connected to a scanner running on 2m FM. It scans all the repeaters and some simplex channels. The scanner halts while there is a signal on the channel and continues after a 5 second break. The node transmits whenever audio is present. To prevent lockups, only home stations can connect to the node, not repeaters. You can transmit to the node if you want, but the audio wont go anywhere. There is no transmitter connected. Please feel free to connect to the node as long as you want - some hams stay connected for hours "reading the mail". Note that QRM can occasionally be experienced from co-located systems - especially 2m packet. The coverage includes all 2m repeaters in Sydney, Gosford, Wyong, Blue Mountains and Wollongong.


The APRS IGate operates on 40m (formerly also 30m and 20m) using the BPQ software under the VK2IO-4 callsign. The 300 baud FSK AX.25 packets are demodulated using the excellent UZ7HO soundmodem software. Multiple close-spaced modems are used on both 40m ports to provide frequency agility of +/- 60 Hz. The dial frequencies for standard 1600/1800 Hz tones are:

HF packet BBS/node/digipeater

An AX.25 packet system running under MS Windows is available on the HF frequencies above. Preferred frequency to avoid APRS traffic is: 7047.17. The applications and callsigns used are:

  • VK2IO-0: BPQ packet mailbox
  • VK2IO-1: BPQ NET/ROM node and digipeater. The NET/ROM alias is SYDNEY.
  • VK2IO-11 BPQ chat node.
  • Telnet access to the BBS is available through telnet://gerard.id.au:6300
  • Web access to the node is available through http://gerard.id.au:6302
  • AX/IP access to the node is available on udp://gerard.id.au:10093

VHF packet BBS/node/digipeater

An AX.25 packet system is available at 1200 bps AFSK on the following frequencies:

  • 147.575 MHz FM
  • 145.175 MHz FM (RX only IGate)

The applications available are:

  • VK2IO-0: BPQ packet BBS carrying all bulletins and linked to the BBS network
  • VK2IO-1: BPQ NET/ROM node and digipeater. The NET/ROM alias is SYDNEY and BBS alias is IOBBS.
  • VK2IO-11: BPQ chat node
  • Message headers are broadcast on 147.575 MHz via the VK2AMW-7 digipeater
  • BBS hierarchical address is VK2IO.#SYD.NSW.AUS.OC

Please feel free to utilise these facilities and keep packet radio alive!


In Nov 2013 I got started in Summits On The Air. I'm now addicted to chasing and also do some activating. In 2014 I started a blog mainly to document my SOTA activities, but also for the projects I'm working on. Check out the blog here.


In 2014 I got interested in the World Wide Flora and Fauna program and now activate parks as often as I can. In October 2017 I became the WWFF VK2 Coordinator handling logs and awards for my home state of NSW. Details here.


I have made some amateur radio-related videos and they can be seen on my GerardVK2IO YouTube channel.
Society memberships include: Wireless Institute of Australia, Amateur Radio NSW, RSGB and ARRL.
Main interests: packet radio, APRS, digital modes, HF operation, SOTA, WWFF, mobiling, antennas, foxhunting and local contests.
Main modes: SSB, CW, FSK300 packet, FSK1200 packet, SSTV, PSK31, FM.

See you on the air (or on the screen).


8491539 Last modified: 2017-12-04 06:02:14, 7760 bytes

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