Uploaded August 2026 | Updated September 2026, 1 week ago
How can one ham radio station deliver a message to another when no direct radio path exists? This demonstration shows JS8Call using an intermediate station to store a message for later retrieval over HF.
N3JF was operating portable in England and wanted to send me a message in Finland. Because he could not reach my station directly, he stored the message on OH1FEU, another JS8Call station that both of us could reach.
Later, I transmitted a heartbeat on 20 metres. OH1FEU replied with my signal report and notified me that a stored message was waiting. I queried the station and retrieved N3JF’s message directly into my JS8Call inbox.
This is asynchronous store-and-forward messaging over ham radio. It does not require an internet connection or a direct radio path between the original sender and recipient. They also do not need to be on the air simultaneously.
The video briefly shows Winlink as another form of asynchronous data communications over radio.
Related asynchronous communications videos:
Ham Radio & Emergency Communications | JS8Call:
youtu.be/C6IRkG2q3vQ
Off-Grid Ham Radio Micro Blogging with JS8Call & VARAC:
youtu.be/szZlPL2h534
Winlink Email to Gmail | Ham Radio for Preparedness:
youtu.be/0T2c7d-lP3w
Asynchronous Emergency Communications playlist:
youtube.com/playlist?list=PLKMrdrsNkFA6U2dC0LrL8_IKBGC0fDhRq
Voice vs Asynchronous Data:
oh8stn.org/blog/2023/01/17/voice-vs-asynchronous-data-for-survival-radio-and-prepping
JS8Call:
js8call.com
Julian’s emergency communications books:
amazon.com/author/julian-oh8stn
Chapters:
00:00 JS8Call Without a Direct Path
00:11 How the Message Was Stored
00:36 Retrieving the Stored Message
00:55 Portable JS8Call Station
01:19 Why Store and Forward Matters
01:34 Asynchronous Emergency Communications
02:02 Closing Thoughts
#JS8Call #HamRadio #OffGridCommunications
How can one ham radio station deliver a message to another when no direct radio path exists? This demonstration shows JS8Call using an intermediate station to store a message for later retrieval over HF.
N3JF was operating portable in England and wanted to send me a message in Finland. Because he could not reach my station directly, he stored the message on OH1FEU, another JS8Call station that both of us could reach.
Later, I transmitted a heartbeat on 20 metres. OH1FEU replied with my signal report and notified me that a stored message was waiting. I queried the station and retrieved N3JF’s message directly into my JS8Call inbox.
This is asynchronous store-and-forward messaging over ham radio. It does not require an internet connection or a direct radio path between the original sender and recipient. They also do not need to be on the air simultaneously.
The video briefly shows Winlink as another form of asynchronous data communications over radio.
Related asynchronous communications videos:
Ham Radio & Emergency Communications | JS8Call:
youtu.be/C6IRkG2q3vQ
Off-Grid Ham Radio Micro Blogging with JS8Call & VARAC:
youtu.be/szZlPL2h534
Winlink Email to Gmail | Ham Radio for Preparedness:
youtu.be/0T2c7d-lP3w
Asynchronous Emergency Communications playlist:
youtube.com/playlist?list=PLKMrdrsNkFA6U2dC0LrL8_IKBGC0fDhRq
Voice vs Asynchronous Data:
oh8stn.org/blog/2023/01/17/voice-vs-asynchronous-data-for-survival-radio-and-prepping
JS8Call:
js8call.com
Julian’s emergency communications books:
amazon.com/author/julian-oh8stn
Chapters:
00:00 JS8Call Without a Direct Path
00:11 How the Message Was Stored
00:36 Retrieving the Stored Message
00:55 Portable JS8Call Station
01:19 Why Store and Forward Matters
01:34 Asynchronous Emergency Communications
02:02 Closing Thoughts
#JS8Call #HamRadio #OffGridCommunications
