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hpr2499 :: Tuning around the HF 40Mtr band

In this episode I give an example of what sort of things you can expect hear on the HF band

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Hosted by MrX on 2018-03-01 is flagged as Explicit and is released under a CC-BY-SA license.
Tags: ham radio, amateur radio, radio, hf.
Listen in ogg, spx, or mp3 format. | Comments (2)

Part of the series: HAM radio, QSK

"I can hear you between my signals." --Definition of QSK This netcast is a personal project. From time to time in my life I've encountered things that I want to share with others. Sharing will be the name of the game here. The topics are sure to be varied, from computers and technology to politics and sociology, from pet peeves to in-depth software how-tos. I'm not sure there's any way to put a classification on what you might hear when you listen, but the hope is that no matter what the subject it will always lead to outrage, thoughtful contemplation, sounds of disgust, a nod of agreement, a fist-shake of righteous indignation. If I can spark some neural activity or inspire a conversation, I have done my job properly. I've already described the netcast to several people who have asked as "80% tech and 20% rant." That might be a good way to sum it up; or it may not. I'm jumping in the car and going along for the ride just like you are. Along the way I hope I put out some interesting information, get tons of feedback from listeners, and overall simply engage the human race (at least the part of it that is listening to me) in a broad dialog. So dip your toes in. The water's fine. You can find the OGG Feed link at the top of the page for downloading the audio episodes to your favorite podcatcher. Let's see where the mood takes us. Intro and Outro music is "Sly Bone" by Larry Seyer.

Tuning around the band

In this episode I tune around a small portion of the HF (High Frequency) band in the 40 Meters section which in the UK covers 7 to 7.2Mhz.

Equipment details

The mode being used was mostly LSB (Lower Side Band)
https://en.wikipedia.org/wiki/Sideband

At the end of the recording I briefly switch mode to to listen to a commercial station on AM (Amplitude modulation).
https://en.wikipedia.org/wiki/Amplitude_modulation

The radio being used is my trusty and much loved Kenwood TS 940S
http://www.universal-radio.com/catalog/hamhf/ts940s.html

The antenna used is a dipole tuned for the 40 Meter band.
https://en.wikipedia.org/wiki/Dipole_antenna

I used my trusty Dictaphone and internal microphone to do the recording
https://www.amazon.co.uk/HccToo-Multifunctional-Rechargeable-Dictaphone-Conversation/dp/B015H9JP6S/ref=sr_1_1?ie=UTF8&qid=1502381150&sr=8-1&keywords=dictation+machines

If you want to hold private conversations with another party over radio then perhaps amateur radio is not for you as this goes against the whole principle of Amateur Radio.

Listening to amateur radio broadcasts is actively encouraged, and in the UK a licence is not required for listening.

A simple receiver capable of listening to sideband broadcasts and odd bit of long wire is all that's required.

In the past it was common to hear an Amateur operator saying goodbye to any short wave listeners at the end of their conversation. If you listen carefully at about 10 minutes in the station DF2BO says goodbye to anybody still listening.

Stations received

  • DF2BO speaking to Peter VK4ZP in Brisbane Queensland, on 7.16209 MHz

  • CW station calling CQ on 7.00994 MHz, I don't know the callsign or details of the station as I can't read Morse code however I did recognise the distinctive rhythm of the letters C and Q.

  • Transmitting the letters CQ on a particular radio frequency is used as an invitation for any operators listening on that frequency to respond. It is widely used in amateur radio.

  • German station unidentified on 7.15794 MHz

  • DF2BO name, Tom, near Stuttgart speaking to Rob VK2XZ who I can't hear on 7.16200 MHz, then speaking briefly with Chris VK2SR who I can't hear

  • Another brief bit of morse code

  • An unknown commercial station broadcasting on 7.35520 on AM


Comments

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Comment #1 posted on 2018-03-06T20:33:46Z by Michael

Great show!

I love the idea of tuning around and simply demonstrating what you can hear. However, I would suggest to add a bit more of commentary to make it more meaningful to those who not already know what they are listening to.

Let me add, that the morse code (CW) signal in both cases was a french station F5IN. Calling CQ DX, a general call for far away stations, in the first bit and just finishing a transmission in a contact in the second one.

When Tom, DF2BO, described his antenna set up, this left me mouth gaping. Yagis 2 elements on 80m (3.5Mhz) and 3 elements on 40m (7Mhz)! These are monsters, way beyond what any "normal" amateur will be able to put up. Just an amazing configuration, that almost makes me drool, when thinking about...
I think this is the kind of background information that makes sense to add, to put the audio in context.

Regards,
Michael

Comment #2 posted on 2018-03-10T16:46:45Z by MrX

re Great show!

Hi Michael, many thanks for the comment, glad you enjoyed the show and your probably correct that a bit of commentary might have been a good idea. There was a couple of reasons that I chose not to add any commentary first it made the podcast easier to make but the real reason was that I was trying to create a bit of mystery for people that had never heard the strange sounds you'd find when tuning around the amateur radio HF band which I thought might be the case for a large portion of the audience.

When I was a young boy I remember listening to old second world war valved receivers that I occasionally had access to and was fascinated by the strange sounds and voices having no idea what I was listening to I thought initially giving no explanation would create more intrigue for those that had never heard HF before and if there interest was gripped then they could have a look for some show notes. I'll probably add some commentary next time if I do a similar show.

PS many thanks for deciphering the Morse code (CW), and yes that was some incredible set-up DF2BO had certainly beats my half wave dipole flung in the loft :)

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