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High frequency

High frequency

Search complete. 176 mentions across 27 episodes found for "High frequency".

Sep 19, 2026

BillHOST
1:47
So you still got a couple of days.
BillHOST
1:49
He's using CW sideband and FT8 MSHV on HF with verticals and an inverted V plus a five element Yagi on six.
BillHOST
1:58
And you can QSL that direct to his home QTH or use LOTW or Clublog.
BillHOST
2:05
From Bahrain, which is Alpha 9, we have this.
Rich MosesonHOST
3:56
For Mancuso, it has meant getting a special event call sign, K6S, and setting up a public demonstration station on October 17th for scouts from throughout the Silicon Valley Monterey Bay Council.
Rich MosesonHOST
4:11
He says they'll be running HF, VHF, and UHF simultaneously, adding that scouts will be hands-on at the mic and keyboard the whole time.
Rich MosesonHOST
4:20
This is their event, he says, not just something they're watching.
Rich MosesonHOST
4:25
Frequencies and other details are in this week's ARRL letter.

9 MINS LATER

Rich MosesonHOST
13:40
The Australian Space Weather Forecasting Centre reports that there are currently three numbered sunspot regions on the solar disk, and that all three are stable.
Rich MosesonHOST
13:49
No flares are expected over the next several days.
Rich MosesonHOST
13:52
The global HF propagation forecast for middle latitudes is normal to fair today, followed by normal propagation in the days that follow.
Rich MosesonHOST
14:02
Predicted 10.7 cm radio flux from the SWPC... is today and tomorrow 90, 95 on Sunday, then an uptick to 100 on September 21st, followed by 110 on the 22nd, and 105 on September 23rd.
Stephan KinfordHOST
0:16
Gibraltar continues two-year-long ham radio anniversaries.
Stephan KinfordHOST
0:20
And HF Radio comes to a 12,000-year-old site in Turkey.
Stephan KinfordHOST
0:25
All this and more as Amateur Radio Newsline report number 2551 comes your way right now.
speaker_1NARRATOR
0:30
From around the world, this is Newsline, Amateur Radio's first independent on-the-air news and bulletin service.
Herman PoppleberryHOST
1:31
Then underneath that, you have radio networks that don't depend on the host country for anything.
Herman PoppleberryHOST
1:37
And the bottom layer, the one that works when everything else is gone, is HF.
Herman PoppleberryHOST
1:41
Why HF specifically? What does shortwave get you that a satellite phone doesn't? No infrastructure between you and the other end.
Herman PoppleberryHOST
1:50
A satellite phone depends on a satellite constellation that somebody owns and somebody can deny.
Herman PoppleberryHOST
1:55
A cellular call depends on towers that the host government can switch off.
Herman PoppleberryHOST
2:00
VHF and UHF are line of sight, so they're fine for talking to your own security detail in the parking lot, but useless for reaching London.
Herman PoppleberryHOST
2:08
HF bounces off the ionosphere.
Herman PoppleberryHOST
2:10
You need a transceiver, an antenna, and power.
CornHOST
0:29
Please verify facts.
Herman PoppleberryHOST
0:31
Daniel's been turning over this antenna on the British Consulate roof, the HF fallback for when everything else goes dark, and he wants to know whether sovereign communication network was a term of art or just something I reached for.
Herman PoppleberryHOST
0:44
His real question is bigger.
Herman PoppleberryHOST
0:46
What makes a system sovereign? Is it about reducing dependence on other sovereigns or on non-state actors too? And how did the word escape the embassy and end up on cloud brochures and AI data centers?
CornHOST
1:48
And each one is a place where dependence creeps in.
CornHOST
1:51
The physical layer is the antenna, and the radio, and the spectrum.
CornHOST
1:55
HF, high frequency, three to thirty megahertz, bounces off the ionosphere.
CornHOST
2:00
It doesn't need satellites.
CornHOST
9:59
What would that gear have looked like in '65?
Herman PoppleberryHOST
10:03
The Soviet Union had been building HF direction finders since the '50s.
Herman PoppleberryHOST
10:07
They had mobile units, van-mounted, with loop antennas and rotating arrays.
Herman PoppleberryHOST
10:12
By the '70s, they had the Pelican system, which was a two-channel HF direction-finding receiver, quite good for its time.
Herman PoppleberryHOST
10:19
But the Pelican came later.
Herman PoppleberryHOST
10:22
In '65, you're looking at earlier gear, probably a single-channel receiver with a directional antenna that an operator turns by hand while watching a signal strength meter.
Herman PoppleberryHOST
11:43
And that's my problem with how this story gets told.
Herman PoppleberryHOST
11:46
Triangulation is a word that makes it sound like a solved problem, a matter of geometry.
CornHOST
0:45
First, the nomenclature.
CornHOST
0:47
Is HF radio the same as shortwave, or are we talking about two different things? Second, the diplomatic scenario.
CornHOST
0:55
Why does HF matter when the host nation turns hostile and cellular and wired internet go dark? Third, the aviation case.
CornHOST
1:03
Why is HF still used for position reporting over the Atlantic when satellites and Starlink exist? Fourth, the security layer.
Herman PoppleberryHOST
2:58
VHF and UHF, by contrast, are essentially line of sight.
Herman PoppleberryHOST
3:02
They go until the curvature of the Earth gets in the way, and then they need a repeater or a satellite to keep going.
CornHOST
3:08
So if I'm standing on a beach with a VHF radio, I can talk to a boat maybe twenty or thirty kilometers out, and then the horizon just swallows the signal.
Herman PoppleberryHOST
3:17
The radio horizon for VHF is slightly farther than the visual horizon because of atmospheric bending, but the principle holds.
BillHOST
5:39
The Seychelles, Sierra 7, Sierra 79 stroke Delta Lima 2 Sugar Baker Yankee Kazimir is QRV from Mahe until September 21st.
BillHOST
5:51
He is using CW sideband and FT8 MSHV on HF with verticals and an inverted V plus a five element Yagi for six meters.
BillHOST
6:01
QSL direct to his home QTH or use LOTW and club log OQRS.
BillHOST
6:08
From Bahrain in the Middle East, Alpha 9, we have this one.

5 MINS LATER

BillHOST
11:19
Sao Tome and Principe, which is Sugar 9.
BillHOST
11:22
The Sugar 9 radio de-expedition will run from October 17th to the 31st from Tamarindo.
BillHOST
11:28
Planned is HF in various modes.
BillHOST
11:31
The antennas are spider beams, hex beams, 40 meter vertical, 80 through 10 meter, and fed half wave, and a six meter five element Yagi.
G4NJHHOST
2:13
A significant body of work has been done by RSGB volunteers and specialists to prepare for the conference and RSGB has submitted 10 papers, making it the largest contributor of any of the member societies.
G4NJHHOST
2:26
The four key areas where the society have input are spectrum protection and HF strategy, protecting 430 to 440 megs, IARU Region 1 governance and licensing and examinations.
G4NJHHOST
2:38
The Society would like to thank Spectrum Forum Chairman Marie Hyman, G6JYB, who led the RSGB expert team who prepared the Society's papers for the conference.
G4NJHHOST
2:51
Marie will attend the conference in person with RSGB Head of Delegation.
G4NJHHOST
2:56
RSGB President Bob Beebe, GU4YOX, RSGB HF Manager Ian Greenshields, G4FSU, and RSGB Board Director Nathan Nuttall, MM9OCC, who has been contributing to the International Development of Youth Amateur Radio through the IARU Region 1's Youth Committee.
G4NJHHOST
3:17
For further information about the RSGB's input, go to RSGB Notice section on the Society's website.
G4NJHHOST
3:24
You can read all the papers submitted for the conference.
G4NJHHOST
7:23
Contacts will be possible via the QO100 satellite.
John CrookHOST
1:36
Now, I'm not talking about the microphones that come like with...
John CrookHOST
1:39
the mobile radios or that come with standard with the HF radios.
John CrookHOST
1:44
No, normally you're getting what they call a palm mic, right? The palm mic plugs into there and it's designed to be held in your hand.
John CrookHOST
1:52
And for VHF, UHF radios, okay, not a problem, right? Because that's usually we use them in a mobile fashion and that kind of thing.
John CrookHOST
1:59
But with the HF radio, some people are like, I don't really want a palm mic.
John CrookHOST
2:02
I want a desktop mic.
John CrookHOST
2:04
And then some people are using their favorite VHF, UHF, dual band, whatever, mobiles as bass radios, and they want a desktop microphone.
John CrookHOST
2:14
So that's where we're going to talk about desktop microphones for today.

17 more episodes mention High frequency.

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