Jon Harder
@ng0e.bsky.social
Creator and maintainer of
• vhf.dxview.org
• hf.dxview.org
• vhf.dxview.org
• hf.dxview.org
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
hf.dxview.org
#hamradio
January 21, 2026 at 1:31 AM
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
hf.dxview.org
#hamradio
Reposted by Jon Harder
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...
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…
steanlab.medium.com
January 20, 2026 at 5:09 PM
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...
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
vhf.dxview.org
#hamradio
December 31, 2025 at 2:41 AM
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
vhf.dxview.org
#hamradio
Reposted by Jon Harder
I've been thinking about this sign for 6 months. a phrase I'll treasure forever. a metaphor with boundless potential
December 26, 2025 at 4:09 PM
I've been thinking about this sign for 6 months. a phrase I'll treasure forever. a metaphor with boundless potential
Reposted by Jon Harder
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...
electrek.co/2025/11/04/a...
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.
electrek.co
November 6, 2025 at 4:58 AM
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...
electrek.co/2025/11/04/a...
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
When the level is below 50% a donation dialog will pop up about once a day for each user.
#hamradio
December 16, 2025 at 9:47 PM
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
When the level is below 50% a donation dialog will pop up about once a day for each user.
#hamradio
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
vhf.dxview.org
#hamradio
November 19, 2025 at 1:16 AM
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
vhf.dxview.org
#hamradio
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
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
November 15, 2025 at 12:03 AM
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
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
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
vhf.dxview.org
#hamradio #newzealand
November 12, 2025 at 12:38 AM
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
vhf.dxview.org
#hamradio #newzealand
Happening now: I think this is legitimate propagation from Wichita to northern Mississippi. Can anyone on the ground confirm?
vhf.dxview.org
#hamradio
vhf.dxview.org
#hamradio
September 25, 2025 at 1:06 PM
Happening now: I think this is legitimate propagation from Wichita to northern Mississippi. Can anyone on the ground confirm?
vhf.dxview.org
#hamradio
vhf.dxview.org
#hamradio
Enhancements for mobile devices have been completed for the HF propagation map.
Most visitors to the HF map are using a phone or tablet. The experience on phones and tablets is much improved now.
The changes will be activated the next time you open or refresh the site.
hf.dxview.org
#hamradio
Most visitors to the HF map are using a phone or tablet. The experience on phones and tablets is much improved now.
The changes will be activated the next time you open or refresh the site.
hf.dxview.org
#hamradio
September 25, 2025 at 12:11 AM
Enhancements for mobile devices have been completed for the HF propagation map.
Most visitors to the HF map are using a phone or tablet. The experience on phones and tablets is much improved now.
The changes will be activated the next time you open or refresh the site.
hf.dxview.org
#hamradio
Most visitors to the HF map are using a phone or tablet. The experience on phones and tablets is much improved now.
The changes will be activated the next time you open or refresh the site.
hf.dxview.org
#hamradio
ANNOUNCEMENT: the process of optimizing the HF+ propagation map for mobile devices has started. The app is working much better on small screens now. The band selection bar appears conveniently at the top of the screen.
hf.dxview.org
#hamradio
hf.dxview.org
#hamradio
September 18, 2025 at 1:03 AM
ANNOUNCEMENT: the process of optimizing the HF+ propagation map for mobile devices has started. The app is working much better on small screens now. The band selection bar appears conveniently at the top of the screen.
hf.dxview.org
#hamradio
hf.dxview.org
#hamradio
The VHF propagation map is working much better for mobile devices now. A significant number of visitors use mobile or tablet devices and this will greatly improve their experience.
Let me know if something should be working better!
vhf.dxview.org
#HamRadio
Let me know if something should be working better!
vhf.dxview.org
#HamRadio
September 12, 2025 at 1:27 AM
The VHF propagation map is working much better for mobile devices now. A significant number of visitors use mobile or tablet devices and this will greatly improve their experience.
Let me know if something should be working better!
vhf.dxview.org
#HamRadio
Let me know if something should be working better!
vhf.dxview.org
#HamRadio
Reposted by Jon Harder
The Latest Ham On A Bike Blogpost is out. There's One Line I Don't Mind Waiting In. "THE GRAY-LINE or GREY-LINE". #AmateurRadio #HamRadio #grayline #greyline #DX #HFpropagation #GraylinePropagation
Jon @ng0e.bsky.social you were referenced in this blog.
hamonabike.blogspot.com/2025/09/ther...
Jon @ng0e.bsky.social you were referenced in this blog.
hamonabike.blogspot.com/2025/09/ther...
There's One Line I Don't Mind Waiting In. "THE GRAY-LINE or GREY-LINE"
hamonabike.blogspot.com
September 6, 2025 at 5:57 PM
The Latest Ham On A Bike Blogpost is out. There's One Line I Don't Mind Waiting In. "THE GRAY-LINE or GREY-LINE". #AmateurRadio #HamRadio #grayline #greyline #DX #HFpropagation #GraylinePropagation
Jon @ng0e.bsky.social you were referenced in this blog.
hamonabike.blogspot.com/2025/09/ther...
Jon @ng0e.bsky.social you were referenced in this blog.
hamonabike.blogspot.com/2025/09/ther...
ANNOUNCEMENT: the VHF propagation map is being optimized for tablets and mobile devices. It is working much better for the smaller screens.
There are a few differences between mouse- and touch-based interaction:
vhf.dxview.org
#hamradio
There are a few differences between mouse- and touch-based interaction:
vhf.dxview.org
#hamradio
September 4, 2025 at 11:38 PM
ANNOUNCEMENT: the VHF propagation map is being optimized for tablets and mobile devices. It is working much better for the smaller screens.
There are a few differences between mouse- and touch-based interaction:
vhf.dxview.org
#hamradio
There are a few differences between mouse- and touch-based interaction:
vhf.dxview.org
#hamradio
The VHF propagation map will start showing more activity. A coding error when translating from Rails to Rust caused some activity to be filtered inappropriately.
vhf.dxview.org
#hamradio
vhf.dxview.org
#hamradio
September 4, 2025 at 10:58 PM
The VHF propagation map will start showing more activity. A coding error when translating from Rails to Rust caused some activity to be filtered inappropriately.
vhf.dxview.org
#hamradio
vhf.dxview.org
#hamradio
Reposted by Jon Harder
A website that lets you select a country or state and move it around a Mercator projection map to yield better size comparisons.
thetruesize.com, created by James Talmage and Damon Maneice
thetruesize.com, created by James Talmage and Damon Maneice
August 30, 2025 at 11:34 PM
A website that lets you select a country or state and move it around a Mercator projection map to yield better size comparisons.
thetruesize.com, created by James Talmage and Damon Maneice
thetruesize.com, created by James Talmage and Damon Maneice
Today some corrections and enhancements were applied to the VHF propagation map.
The changes improve the interaction as the pointer is moved over active stations. A white outline adds contrast to the footprint and when selected the paths are clearly revealed.
vhf.dxview.org
#hamradio
The changes improve the interaction as the pointer is moved over active stations. A white outline adds contrast to the footprint and when selected the paths are clearly revealed.
vhf.dxview.org
#hamradio
August 30, 2025 at 11:15 PM
Today some corrections and enhancements were applied to the VHF propagation map.
The changes improve the interaction as the pointer is moved over active stations. A white outline adds contrast to the footprint and when selected the paths are clearly revealed.
vhf.dxview.org
#hamradio
The changes improve the interaction as the pointer is moved over active stations. A white outline adds contrast to the footprint and when selected the paths are clearly revealed.
vhf.dxview.org
#hamradio
ANNOUNCEMENT: The HF propagation map now has an option to display the gray line. This feature is activated with a checkbox in the main menu.
hf.dxview.org
#HamRadio
hf.dxview.org
#HamRadio
August 28, 2025 at 11:09 PM
ANNOUNCEMENT: The HF propagation map now has an option to display the gray line. This feature is activated with a checkbox in the main menu.
hf.dxview.org
#HamRadio
hf.dxview.org
#HamRadio
Of all the the lighthouses on the air this past weekend, 7S0SFJ in Sweden is one of the unique ones. The station is on the "Finngrundet," a lightship that was in service from 1903 to 1969.
www.sjohistoriska.se/en/visit/the...
#hamradio #lighthouse
www.sjohistoriska.se/en/visit/the...
#hamradio #lighthouse
August 19, 2025 at 1:33 AM
Of all the the lighthouses on the air this past weekend, 7S0SFJ in Sweden is one of the unique ones. The station is on the "Finngrundet," a lightship that was in service from 1903 to 1969.
www.sjohistoriska.se/en/visit/the...
#hamradio #lighthouse
www.sjohistoriska.se/en/visit/the...
#hamradio #lighthouse
Here is an unexpected mid-ocean HF propagation data point. KQ6RS reports this WSPR equipped buoy drifting in the North Atlantic is a high school project. During your station's off time, set up WSPR on 20m to see if it picks up the 0.01W signal!
www.qrz.com/db/KQ6RS
hf.dxview.org
#hamradio
www.qrz.com/db/KQ6RS
hf.dxview.org
#hamradio
July 26, 2025 at 11:05 PM
Here is an unexpected mid-ocean HF propagation data point. KQ6RS reports this WSPR equipped buoy drifting in the North Atlantic is a high school project. During your station's off time, set up WSPR on 20m to see if it picks up the 0.01W signal!
www.qrz.com/db/KQ6RS
hf.dxview.org
#hamradio
www.qrz.com/db/KQ6RS
hf.dxview.org
#hamradio
VY0ERC is another far-north amateur operation on the HF propagation map. The club station is at the Eureka Weather Station on Ellesmere Island in Nunavut (Canada). Listen for them on FT8.
FT8 activity: rbn.telegraphy.de/activity/VY0...
Ellesmere propagation: hf.dxview.org/perspective/...
#hamradio
FT8 activity: rbn.telegraphy.de/activity/VY0...
Ellesmere propagation: hf.dxview.org/perspective/...
#hamradio
July 25, 2025 at 1:44 AM
VY0ERC is another far-north amateur operation on the HF propagation map. The club station is at the Eureka Weather Station on Ellesmere Island in Nunavut (Canada). Listen for them on FT8.
FT8 activity: rbn.telegraphy.de/activity/VY0...
Ellesmere propagation: hf.dxview.org/perspective/...
#hamradio
FT8 activity: rbn.telegraphy.de/activity/VY0...
Ellesmere propagation: hf.dxview.org/perspective/...
#hamradio
Have you ever wondered why the HF map has propagation from the far north? Polarstern is a German polar research vessel. It is active as DP0POL using WSPR on 7, 10, 14, and 18 MHz. Today it is above 84º N latitude.
Follow DP0POL on WSPR: www.wsprnet.org/olddb?mode=h...
hf.dxview.org
#hamradio
Follow DP0POL on WSPR: www.wsprnet.org/olddb?mode=h...
hf.dxview.org
#hamradio
July 24, 2025 at 1:06 AM
Have you ever wondered why the HF map has propagation from the far north? Polarstern is a German polar research vessel. It is active as DP0POL using WSPR on 7, 10, 14, and 18 MHz. Today it is above 84º N latitude.
Follow DP0POL on WSPR: www.wsprnet.org/olddb?mode=h...
hf.dxview.org
#hamradio
Follow DP0POL on WSPR: www.wsprnet.org/olddb?mode=h...
hf.dxview.org
#hamradio
The HF propagation predictions charts are working better after correcting errors introduced in the conversion to Rust.
The chart shows hours of the day going from left to right, starting at 0000Z (UTC). The red vertical bar is the current time.
Color coding shows SSB, CW, FT8 or WSPR.
#HamRadio
The chart shows hours of the day going from left to right, starting at 0000Z (UTC). The red vertical bar is the current time.
Color coding shows SSB, CW, FT8 or WSPR.
#HamRadio
July 18, 2025 at 12:58 AM
The HF propagation predictions charts are working better after correcting errors introduced in the conversion to Rust.
The chart shows hours of the day going from left to right, starting at 0000Z (UTC). The red vertical bar is the current time.
Color coding shows SSB, CW, FT8 or WSPR.
#HamRadio
The chart shows hours of the day going from left to right, starting at 0000Z (UTC). The red vertical bar is the current time.
Color coding shows SSB, CW, FT8 or WSPR.
#HamRadio
Drawing areas of propagation that cross the 180th meridian (International Date Line) on the HF map have always been a mathematical challenge. A bit ago an update was uploaded that finally gets it right (I think). Errors had been showing up particularly on 20 meters.
hf.dxview.org
#hamradio
hf.dxview.org
#hamradio
July 13, 2025 at 1:45 AM
Drawing areas of propagation that cross the 180th meridian (International Date Line) on the HF map have always been a mathematical challenge. A bit ago an update was uploaded that finally gets it right (I think). Errors had been showing up particularly on 20 meters.
hf.dxview.org
#hamradio
hf.dxview.org
#hamradio