Jon Harder

A screenshot the new HF+ propagation map home page showing sections labeled "View map", "About", "News", "Donations", "Amateur Radio", and "Sources".

A new starting page has been created for the HF+ propagation map. Like the VHF page released earlier, it explains the purpose of the site and explains what it does. A new features allows users to set the perspective by providing a callsign.

hf.dxview.org
#hamradio

MAYDAY from the airwaves: Belarus begins a death penalty purge of radio amateurs Behind the absurdity of charging Baofeng users with ‘High Treason‘ lies a terrifying intellectual genocide and an urgent call for…

The authoritarian government of Belarus is purging the country’s ham operators, charging them with treason and seizing their radio equipment. steanlab.medium.com/mayday-389f5...

Two cluster servers are checked simultaneously, rotating through dozens located in North America, one of which is usually

WC2L-1, dxc.wc2l.com:7373 or
N5UXT, dxc.n5uxt.org:7373

This may change in the future.

Jon, NG0E

A starting page layout divided into multiple sections titled "View map", "About", "News", "Donations", "Amateur Radio", and "Technologies".

The VHF propagation map now has a descriptive starting page. It offers several ways to enter the map and more details about the site.

vhf.dxview.org
#hamradio

BEST HAM in the airport sign @ BCN

I've been thinking about this sign for 6 months. a phrase I'll treasure forever. a metaphor with boundless potential

Australia has so much solar that it's offering everyone free electricity Australia's extensive solar power penetration makes so much energy that the government wants to offer free electricity at peak hours.

Australia has so much electricity from solar power that it is going to start offering free electricity to everyone for at least three hours during the day as the wholesale price of power goes negative

electrek.co/2025/11/04/a...

A donations popup that includes a yellow bar graph indicating the current funding level.

Donations cover the server, network bandwidth and other incidental expenses for providing the VHF and HF maps. Thanks to all who have donated!

Direct donation link: www.paypal.com/donate/?host...

HF map: hf.dxview.org
VHF map: vhf.dxview.org
#hamradio

Map icons that include a red heart for access a donations menu

The propagation maps recently added a heart icon for donations that appears when the funding level falls below 100%. The heart becomes more red as the funding level falls.

When the level is below 50% a donation dialog will pop up about once a day for each user.

#hamradio

A VHF propagation map showing the interconnecting hops of many stations arching over a region in Europe.

When the "connected" option is used, all the connections in a region are exposed and station labels are suppressed. The keyboard shortcut c-click is equivalent. 3/3

vhf.dxview.org
#hamradio

A VHF propagation map showing two different stations selected simultaneously.

Selecting the "multiple" option allows station selections to accumulate. The keyboard shortcut alt- or option-click is equivalent. 2/3

vhf.dxview.org
#hamradio

A VHF propagation map showing a new popup menu for selecting station details.

ANNOUNCING: The VHF propagation map has more options for showing hop details. Upon selecting a station's footprint a "details" menu pops up offering "single", "multiple", or "connected" views. 1/3

vhf.dxview.org
#hamradio

You should let me know anyway. I try to test everything before uploading, and this time it was such a trivial change I didn't bother. That was a mistake!

This feature has been changed from the 'r' key to 'c' to correspond with the menu that pops up and offers a "connected" option.

Sorry about that -- Javascript error I didn't catch. The patch is uploading right now and should be live in a few minutes. Just refresh your browser. Thanks for the head up.

That trips me up too sometimes. The underlying map relies on OpenLayers interface and the OpenSteetMap. They are both open source and free to use. OpenLayers would support other maps if one can be found that is stable and well supported. I haven't found one.

Browser address bar showing link to a particular perspective.

There are now two ways to bookmark the HF+ propagation map:

By band: hf.dxview.org/band/14 — set the band to the given MHz. Valid band numbers are 1, 3, 5, 7, 10, 14, 18, 21, 24, 28, and 50.

By location (grid square):
hf.dxview.org/perspective/...

#hamradio

VHF propagation map show activity between Aukland and Wellington, New Zealand.

An update to the VHF propagation map has been uploaded. It has a number of fixes including better representation of activity that is adjacent to the international dateline, particularly for New Zealand.

vhf.dxview.org
#hamradio #newzealand

I'm thinking about how to make this work on touch screens. Any ideas?

Is it still useful to have the alt/option-click method, or does this replace it completely?

Another iteration of the path feature was uploaded today:
• The "r" key clears all labels; tapping "r" any time has the same effect.
• No new labels appear as long as the "r" key is held down.
• Shorter hops are not displayed, to reduce clutter.
• The search for connected paths has been expanded.

APRS paths spanning from the Great Lakes to the Atlantic

Another followup to this — if you hold down the "r" (for recursive) key and select a footprint, it will expand to all the connected paths. To reduce clutter station callsigns are omitted.

You may need to refresh your browser to pick up the change.

The update has been uploaded. The map will self-correct over time or clicking on footprints with incorrect paths will load the corrected data. Thanks for helping to troubleshoot this.

The Es filtering needs more work. Right now it is triggered when there are at least three intersecting paths of 1750+ km from 6 distinct stations. Once that is met, any path of 500+ km in the vicinity is accepted. Something in there needs to be tightened up.

I think I found the problem. I'll do some testing and upload it soon if everything looks normal again. I thought I saw an optimization opportunity, but that just broke things in a mirror image way. I've documented that area better!

Hmm, I'm seeing that this morning too. It must have to do with with a recent update. I'll work on it. The update has to do with restoring e-skip detection and display. It is mostly working except for eliminating false positives. Something about that change must be causing what you see.

Do most people know the corn grown the corn belt is not edible directly? It mostly goes into ethanol, cattle feed, and such. The same for soybeans: biodiesel, oils, etc. The terms here in MN are "field corn" which is everywhere and "sweet corn" which is edible but I haven't any of that this season.

It seems OK to me. Could it be a local problem?

VHF propagation map showing activity from Wichita to northern Mississippi.

Happening now: I think this is legitimate propagation from Wichita to northern Mississippi. Can anyone on the ground confirm?

vhf.dxview.org
#hamradio

On small screens, the prediction will fill the view and on larger devices it will appear as an inset at the bottom left.

On large screen the prediction will change as the target destination is moved to a new location. The inset will move to get out of the way of the target as needed.

hf.dxview.org

A propagation prediction chart for 14 MHz between the grid squares PM35 and PI58.

There is a new button on all devices to reveals a propagation prediction between two points on the HF map.

To show the prediction, first select an initial location. Next select a distant point of interest. Finally, at the top of the window, select "show prediction …".

hf.dxview.org
#hamradio