[pskmail] The 30m Band Utilization Chart -- 2 June 2011

  • From: Ian Wade G3NRW <g3nrw@xxxxxxxxxxx>
  • To: pskmail@xxxxxxxxxxxxx
  • Date: Thu, 2 Jun 2011 09:19:22 +0100

Just in time for the 30m Multi Mode weekend -- 4/5 June 2011.

A few weeks ago Don Hobson, KB9UMT, founder of the 30m Digital Group, published the updated "unofficial 30m bandplan" on the 30MDG reflector. I responded, saying that the listing was a little misleading, because some frequencies were dial frequencies, others were emitted frequencies, and it wasn't clear which was which.

Don challenged me to do better. At first I tried to improve the listing format, to draw the distinction between dial and emitted frequencies, but quickly realized this was not an easy task! I finally capitulated and decided on a graphical format instead:


I have called it a "Band Utilization" chart. It is exactly that. It is not a "bandplan", nor even an "unofficial bandplan". Rather, it is an attempt to graphically portray the many modes that are actually in use on 30m today. On the chart there is a clear distinction between dial frequencies and emitted frequencies, helping you to accurately set the correct frequency and to identify signals as they appear on the waterfall.

Prior to posting the chart on my website, I sent a couple of draft versions to a number of the world's "movers and shakers" in digital communication and HF. Several of them responded with very helpful comments, suggestions and corrections, for which I am very grateful.

It's been an "interesting" exercise to fit everything in, but I hope you will find the finished chart useful. I think you will be intrigued to see just how much is squeezed into the band, especially above 10.140. In particular, the graphical approach highlights several overlaps between modes, which (to me at least) weren't at all obvious from the tabular frequency listing. I was also unaware of just how many Winlink RMS stations are active: no less than 48 stations on 32 frequencies, mostly above 10.140.

The chart is a living document. If you see any errors or omissions, or want to suggest improvements, please email me at g3nrw@xxxxxxxxxxx

Enjoy the Multi Mode weekend!

Ian, G3NRW

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