CW Calling Frequency: 7050kHz

Main HF Calling Frequency for CW adopted by several VKCW Operators since July 31, 2015 is 7050kHz.

Code of Conduct

  • Keep calls short, whether for CQ or calling a specific station, no longer than 3 x 3 e.g. CQ CQ CQ DE VK9AB VK9AB VK9AB K
  • QSY immediately after establishing contact
  • No more than 3 calls to be made during any 5 minute period so as not to hog the calling frequency

Usage Scenarios

  • Listen on 7050 while doing other things such as home-brewing, Emails, or not otherwise engaged
  • Especially around H+15 to H+18 and H+45 to H+48 (quarter to and/or quarter past the hour) see "SP" below
  • Use as a meeting place for skeds, you need only arrange the time, then QSY to a clear frequency
  • If the band is empty and you get no results from a CQ call in the CW-exclusive band (7000-7030) try 7050
  • Announce a SOTA activity or any other short piece of news, e.g. a DX station and its frequency
  • Announce your start or end of activity, GM, GN, QSW Down (I'm going to send/CQ somewhere down band)
  • Listen to this recording to see how wonderful a CW calling frequency can be! It'll give you many ideas!

SP: (QRP) Sending Period / (QRP) Silence Period

  • Born also out of the experience since after the Titanic on how 500kHz was used, the "Silence Periods"
  • Every half hour for 3 minutes at quarter past and quarter to each hour is "SP"
  • During "SP" listen intently for QRP, portable, mobile stations or urgent messages
  • Higher power stations if hearing nothing may send "SP" once each to indicate their presence,
  • And at the end of the SP (18 or 48 minutes past the hour) then send callsign and/or CQ

Why 7050?

  • CW Exclusive Band (7000-7030) no calling frequency possible as always random activity, skeds, SSB Indonesia QRM
  • Extensive monitoring found this frequency generally clear (see SSB QRM below)
  • Under the new band plan since July 2015, 7040-7060 is shared narrow-band data/CW, SSB is 7060-7300
  • Historic prescedence with 50kHz up from some band edges having been used as CW calling frequencies

40m Band Plan

  • 7000-7040 CW Exclusive
  • 7040-7060 CW and Data Shared
  • 7060-7300 CW and SSB Shared
  • All SSB operation should now occur at 7060 and above
  • See WIA band plan here (.PDF file)

SSB QRM

  • See above notes on the band plans, LSB-LSB QSOs should now be taking place between 7063 and 7299 kHz
  • 7050.0 CW should be completely free of any SSB QRM. Any SSB QRM affecting 7050 would be outside the SSB band
  • SSB has entire range 7060-7300, with most Region 3 countries having only 70kHz for SSB, in VK we have 240kHz allocation

Note that some people are still unaware of the new band plan. When informing SSB operators who are making QRM on 7050, politely inform them of the following:

  • Already 60+ stations are using 7050 as CW calling frequency
  • 7050 falls inside the non-SSB part of the band
  • The new band plan for SSB is 7060-7300 and is available for download on the WIA website
  • Amateurs have an obligation not to cause interference to others
  • Several CW ECOMMS QTC operators are also using 7050 as monitoring and calling frequency
  • There is plenty of room further up the band, the SSB allocation is 240kHz wide and in recent years SSB gained much spectrum

Secondary Calling Frequency

7051.2 may be used as a SECONDARY CALLING FREQUENCY to 7050 in the event of QRM (RTTY, SSB etc) on 7050 as often happens in the late evenings. Therefore if you wish to avoid QRM you may listen to one or the other in narrow filter, but if you are maintaining watch, you can listen on a wide filter depending on your receiver: if your CW position is "LSB" (you hear stations DOWN from the frequency) then listen on 7051 in wide mode, if your CW position is "USB" (you hear stations UP from the frequency) listen on 7050 —- that way you will hear calls on either frequency.

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