Signabroam Shortwave Wiki

ICW/CW. Auto sent MCW has been used in the past. E07, XP
5f, 3 or 4F DK, ends "000 000" Uses short zero
Very active. Always appears on 10 min slots (i.e. H00, H+10, H+30 etc.), with the
two most used time slots being H00 & H+30.
Always uses frequencies in the ITU Fixed Allocation segments using the full short
wave spectrum.
Where msg length exceeds the time, the 2nd & 3rd transmissions will be sent
approx 2 mins after the previous msg has completed transmission. Where no msg is
sent there is no third transmission.
Transmissions up to 1200z the freqs go from low to high, after 1200z they go from
high to low, although there are a small number of exceptions to this rule.
The call ID is sent fairly slowly at about 15 WPM for 2 minutes, but DK, GC & msgs
are usually sent around 30 WPM. (Variable)
Null format: (3 fig ID sent 3 times followed by 000), repeated for 2 mins
Msg format: (3 fig ID sent 3 times followed by 1), repeated for 2mins.
DK GC DK GC, msg 5 fig single grps. Ends 000 000
ID is always 3 fig. DK can be 2 or 3 fig.
Uses regular scheds, but these change over time with new scheds appearing & old ones
ceasing. Scheds appear with one transmission or more per week, though a repeat may
be sent on another day, usually - but not always on the same freq / time. Scheds also
often reappear yearly at the same Month / Day / Time slots.
Most of the early transmissions (0340 - 0600z) have ceased with only a few remaining.
Current comprehensive activity Charts and Predictions published in Newsletters. 
                

Active:

• E07
• V07
• XPA
• XPA2
• XPB
• F07
• P07

Inactive:

• G07
• S07
• V07F
• XP