Olivia is the digital communications mode on shortwave (high frequency sub band, or, HF) for amateur radio operators who want more than the “Check Propagation” FT8 mode. This video is an introduction that was presented to the Raleigh Amateur Radio Society ( https://www.rars.org/ ) on December 12, 2023, presented by Tomas Hood, NW7US

Olivia information can be found, here:
https://OliviaDigitalMode.org

Olivia, a Multi-Frequency Shift Keying (MFSK) radioteletype digital mode, is an amateur radioteletype protocol designed to work in difficult (low signal-to-noise ratio plus multipath) propagation conditions on shortwave radio (i.e., high-frequency, or HF) bands. The typical Olivia signal is decoded when the amplitude of the noise is over ten times that of the digital signal! It is commonly used by amateur radio operators to reliably transmit ASCII characters over noisy channels (slices of high-frequency spectrum — i.e., frequencies from 3 MHz to 30 MHz; HF) exhibiting significant fading and propagation phasing.

The Olivia digital modes are commonly referred to by the number of tones and the bandwidth used (in Hz). Therefore, it is common to express the Olivia digital mode as Olivia X/Y (or, alternatively, Olivia Y/X ), where X refers to the number of different audio tones transmitted, and Y refers to the bandwidth in Hertz over which these signals are spread. Examples of common Olivia modes are, 8/250 (meaning, 8 tones/250-Hertz bandwidth), 16/500, and, 32/1000.

The protocol was developed at the end of 2003 by Pawel Jalocha. The first on-the-air tests were performed by two radio amateurs, Fred OH/DK4ZC and Les VK2DSG, on the Europe-Australia propagation path in the 20-meter shortwave radio amateur band. The tests proved that the Olivia protocol (or, digital mode) works well and can allow regular intercontinental radio contacts with as little as one-watt RF power (when propagation is highly-favorable). Since 2005, Olivia has become a standard for digital data transfer under white noise, fading and multipath, flutter (polar path) and auroral conditions.

Olivia can perform nearly as good as the very popular WSJT mode, FT8, and better than FT4.

See you on the waterfall!

73 de NW7US

SOME INFORMAL THOUGHTS ON WORKING CW DX

Recently, I came across some questions another amateur radio operator posed to a group of CW enthusiasts. Since I have an interest in Morse code, I thought I would explore these questions:

— begin quote —

1. When chasing some particular CW DX station needed for my DXCC punch-list, what are some things(s) that one can do to improve one’s chances of snagging that DX contact amidst a congested pileup? Is it truly the luck of the draw or roll of the dice? Or are there some time tested methods, less than obvious, that the experienced CW DX chasers have used that seem to improve one’s chances of snagging the DX contact? Yes, I’m aware that there are many variables to consider. I’m just looking for some general suggestions to improve my odds of success based on the experience of others.

2. If, let’s say, a DX station appends “UP 1” or “QSX 2” to his CQ call or just “UP” appears in a DX cluster spot listing, what is considered an acceptable amount of “UP”? I’m amazed sometimes at the amount of “UP” that I hear. LOL. Does a hefty amount of “UP” actually improve one’s chances? What does the DX op expect?

3. After a DX station sends their callsign how long should one wait to reply with one’s callsign? I hear stations respond immediately. But sometimes I hear others wait just a “bit”, and then respond to DX. And sometimes when the DX station is responding to a chosen station, other callers are STILL calling the DX op. What do most DX operators expect with regard to the response of a reply? Immediate? One-Mississippi …?

4. I hear stations reply to DX with their callsign once. Others sometimes twice. If I send my callsign twice I run the risk that the DX station has already begun his reply back to me with my sig-report while I’m still in the midst of sending my 2nd callsign reply. So … I should send my call just once?

— end quote–

Great questions!  And, the answers translate over to working DX pileups on voice, too.

Here are some of my off-the-cuff remarks, based on my limited experience DXing since 1990:
(I am an avid DXer, with 8BDXCC, etc.)

1. Listen, Listen, Listen: The DX station typically does work split – the DX station on, say, 14.023 MHz, and the DX station is listening anywhere from 14.028 to 14.033 (up 5 to 10). You first, of course, need to listen to the DX station, but, also to hear the stations that are calling the DX station! The trick is to be able to hear some of the stations that are piling up on the DX, and to determine if the DX is working a station, then tunes up a little, or down a little, from the frequency on which the last caller was chosen.

Once you know this, you want to position your signal so that the DX operator tunes to or very near where you are transmitting your signal. If the DX station does not call you but continues in the same tuning direction, you reposition your transmit frequency (always in the pileup window) and try again. If you do not know where the DX station is listening next, and especially if you cannot HEAR the DX station, you are calling blind and are in for a long effort.

If you have a way to see the waterfall at and around the DX frequency, you can often see the general spread of “UP” where the callers congregate. When listening (and, let me tell you, listening is key) to the DX station, watch the waterfall for the responding caller (the station in the pile-up calling the DX), as sometimes it is very obvious who is answering the DX. Watch this exchange for a number of new callers – and get a sense of HOW the DX operator is moving through the pile-up. Anticipate where the DX might listen next. Choose that “next frequency in the pattern of movement” and use that as your calling frequency.

2. Timing your call: this takes a bit of effort. I typically listen to my chosen transmit frequency, trying to call never at the exact same time as others, on or near my calling frequency.

3. I always send my callsign TWICE… something like this:

DX: DX1ABC UP
ME: NW7US NW7US
DX: NW7US 5NN
ME: R R NW7US 5NN TU
DX: NW7US TU, DX1ABC UP

There are some fine CW-oriented DXing books, PDFs, and websites that talk about this. For instance:

http://sota-dl.bplaced.net/articles/cw_chasing_tips_for_newcomers.pdf

https://www.cadxa.org/getting-started-in-dxing.html

I hope this personal observation of mine about working a Morse code pileup is helpful in some way.

73 de NW7US
https://NW7US.us

..

 Hide it in your holiday lights!

For all their supposed benefits, homeowner’s associations (HOAs) have a reputation of quickly turning otherwise quaint neighborhoods into a sort of Stanford prison experiment, as those who get even the slightest amount of power often abuse it. Arbitrary rules and enforcement abound about house color, landscaping, parking, and if you’ve ever operated a radio, antennas. While the FCC (at least as far as the US is concerned) does say that HOAs aren’t permitted to restrict the use of antennas, if you don’t want to get on anyone’s bad side you’ll want to put up an antenna like this one which is disguised as a set of HOA-friendly holiday lights.

For this build, a long wire is hidden along with a strand of otherwise plain-looking lights. While this might seem straightforward at first, there are a few things that need to be changed on the lighting string in order to make both the antenna and the disguise work. First, the leads on each bulb were removed to to prevent any coupling from the antenna into the lighting string. Clipping the leads turns what is essentially a long wire that might resonate with the antenna’s frequency into many short sections of wire which won’t have this problem. This also solves the problem of accidentally illuminating any bulbs when transmitting, as the RF energy from the antenna could otherwise transfer into the lighting string and draw attention from the aforementioned HOA.

Tests of this antenna seemed to show surprising promise while it was on the ground, but when the string and antenna was attached to the roof fascia the performance dropped slightly, presumably because of either the metal drip edge or the gutters. Still, the antenna’s creator [Bob] aka [HOA Ham] had excellent success with this, making clear contacts with other ham radio operators hundreds of miles away. We’ve shared another of [Bob]’s HOA-friendly builds below as well which hides the HF antenna in the roof’s ridge vent, and if you’re looking for other interesting antenna builds take a look at this one which uses a unique transformer to get wide-band performance out of an otherwise short HF antenna.

https://www.youtube.com/watch?v=4uG_D0bDGuI

Antenna Hidden In Holiday Lights Skirts HOA Rules | Hackaday

~ Hackaday

Wrapping up another year!

The November - December 2023 Communicator, digital periodical of Surrey Amateur Radio Communications is now available for viewing or download.

Read in over 145 countries, we bring you 134 pages of Amateur Radio content from the Southwest corner of Canada and elsewhere. With less fluff and ads than other Amateur Radio publications, you will find Amateur Radio related articles, projects, profiles, news, tips and how-to's for all levels of the hobby.

You can view or download it as a .PDF file:  

Previous Communicator issues are at:

https://ve7sar.blogspot.com/search/label/The%20Communicator

and a full index is HERE.  

As always, thank you to our contributors, and your feedback is always welcome. 

The deadline for the next edition is December 15th.

If you have news or events from your club or photos, stories, projects or other items of interest from BC or elsewhere, please contact us at [email protected]

73,

John VE7TI
'The Communicator' Editor

 SARCBUZZ

Monthly News and Announcements
Celebrating 50 years of service - 1975-2023

September 30, 2023

• CQ WW DX Contest (SSB)
  October 28/29 Don’t miss out on your chance to compete in the largest Amateur Radio contest in the world. Over 35,000 participants take to the airwaves on the last weekend of October with the goal of  making as many contacts with as many DXCC entities and CQ Zones as possible. Both seasoned SARC DXers and GOTA newbies are invited to participate as a VE7SAR team. Coaching will be available to those who request it. Whether we operate two radios as Multi-Two (Low Power) or one radio as Multi-One (High Power) will depend on the number of operators signed up. Both Larry ([email protected]) and John ([email protected]) will collect names of those who wish to participate, and prepare a schedule. The team already has the September CQ WW RTTY contest under its belt and is looking forward to this next challenge.

• Soldering Workshop
  October 21 8:30 am - Noon. FULL This workshop is for those new to soldering or wishing to refresh their skills. As presented by Dino (VE7XDT) and John (VE7TI) the workshop includes an introduction to soldering, types of soldering irons and stations, and  the construction of an xmas tree circuit board (agenda attached). This workshop is FULL but if you wish to be put on a waiting list or have interest in the next workshop you may contact John VE7TI or Larry VE7LXB .

• Delta ARS Comfest

Sunday October 15 10am - 1pm The long tradition of the ComFest Amateur Radio Swap Meet continues. It is a great venue to meet fellow hams, buy and sell gear and or simply discover what the world of amateur radio has to offer. 1720 56th Street Tsawwassen. General admission $5. Major door prizes.

• SARC Monthly Meeting
  Wednesday October 11th 7pm - 9pm. Location: Surrey Fire Hall Training Centre. The guest speaker for the next meeting is Halden Field VE7UTS. Halden is a member of the North Shore ARC and a past contributor to their newsletter and to The Communicator. Halden has presented at several west coast Ham Fests including at Seaside Oregon. He will be speaking on some of his favourite amateur radio construction projects.

• Saturday Morning Breakfast and OTC
  SARC Meets informally for breakfast at Denny’s Restaurant 6850 King George Boulevard in Surrey, between 7:30 and 9:00am each Saturday morning. We’d love for you to join us. Following breakfast, the OTC will be open from 9:30 until noon. You are invited to come down to the OTC with your equipment and any ham-related issues and our Elmers will try to assist you. You can also reach Elmers by email at [email protected].

Thank you for being a SARCBuzz reader.

[email protected]

Calendar of Events

SARC in the park!

We had an interesting workshop on Saturday, September 16, 2023.  'SARC in the Park' was a presentation by Dmitry VA7DVO for our members interested in POTA activations. You will find more about getting started in POTA at their website, and in our free digital magazine 'The Communicator'.

With an easy to build and inexpensive segmented 5-band wire dipole antenna, we made several of the 17m SSB POTA contacts shown in this video, including Switzerland, Italy and with a mobile station in Northern England.

The antenna plan is at: https://bit.ly/SARC23Sep-Oct on page 45.

Dmitry VA7DVO presenting POTA at the OTC

The on-site demonstration took place at Serpentine Fen Wildlife Refuge. 

Alex VA7PVC, Dmitry VA7DVO , and Leandro VE7LSI at Serpentine Fen

Here is the presentation on video and a look at the activation

https://youtu.be/RTAKs40DHjQ

Here's another great issue!

'The September-October 2023 Communicator' digital periodical of Surrey Amateur Radio Communications is now available for viewing or download.

Our biggest issue to date, read in over 145 countries, we bring you 132 pages of Amateur Radio news from the South West corner of Canada and elsewhere. With less fluff and ads than other Amateur Radio publications, you will find Amateur Radio related articles, projects, profiles, news, tips and how-to's for all levels of the hobby.

You can view or download it as a .PDF file:  

Previous Communicator issues are at:

https://ve7sar.blogspot.com/search/label/The%20Communicator

and a full index is HERE.  

As always, thank you to our contributors, and your feedback is always welcome. 

The deadline for the next edition is October 15th.

If you have news or events from your club or photos, stories, projects or other items of interest from BC or elsewhere, please contact us at [email protected]

73,

John VE7TI

'The Communicator' Editor