Tag Archives: Digital Modes

DigiFest this weekend!

DigiFest this weekend!

This is a farily straightforward and fun contest each June.

You can work one or more time periods (there are special awards for those who only work one time period):

I Period 04:00 UTC – 12:00 Saturday 2 June 2012
II Period 20:00 UTC – 04:00 Saturday 2 June / Sunday 3 June 2012
III Period 12:00 UTC – 20:00 Sunday 3 June 2012

In CDT (Local) Time

I Period 23:00 CDT – 07:00 Friday June 1st / Saturday June 2nd
II Period 15:00 CDT – 23:00 Saturday June 2nd
III Period 07:00 CDT – 15:00 Sunday June 3rd

MODES Allowed are (NOTE NO PSK31)

RY = RTTY (75 baud)
OL = OLIVIA (250 Hz, 4 tones)
MK = MFSK16 (or MF)

80/40/20/15/10 meters bands BUT NOT the 20m PSK31 Area 14.070-14.071 which is a Disqualification!

Dupes Contacts allowed on ONLY if on different bands or by different modes on the same band (5 QSO’s in different modes will be counted per each band).

Exchange: Signal report + four-digit Grid Square (Example: 599 EN64)

Full rules: http://www.mixw.net/misc/DigiFest/rulese2012.html

GL & 73


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K9ZW Joins the JT65 160m Affray

Decided I should give the JT65 mode a whirl after hearing how much success Scott W9JSB was having.

As I had earlier been on the 160m SSB Every Night Net, I thought I would see if there was any JT65 on 160m.

What a surprise as at 1.838 there is a raft of stations – at least that is what it sounded like “by ear.”

Downloading the JT65 software was easy – setting up things to work with PowerSDR and the Flex-5000A was a bit roundabout but doable.

The result was QSOs from the start!

Here is a screen shot of the software running (you can click to see a larger version):

K9ZW in a JT65 160m QSO with N4UPX

K9ZW in a JT65 160m QSO with N4UPX

All told I only made Eight JT65 160m QSOs – they take several minutes each – here is the calls and reports:

WA3WZR -17
N4UPX -08
K4JJQ -08
VE9DX -03
N6KMR -10
K0IDT -04
W5GW -12

Went right back and added another ten QSOs:


JT65 is a rather unusual mode in that it is about making the contact, and just about anything else is “chatter” and generally technically a difficultly.

Here is a descriptive and history of the mode: http://en.wikipedia.org/wiki/WSJT_(Amateur_radio_software)

The Project’s Homepage is at: http://sourceforge.net/projects/jt65-hf/

Flex had an article on configuration that was based on an older versions, but helped: http://kc.flex-radio.com/KnowledgebaseArticle50362.aspx

Definitely an interesting mode and I am sure I will play around with it a bit.

Hope to meet you on 160m JT65 sometime soon!



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Hellschreiber – that Fuzzy Mode

K9ZW as received at KX5JT

K9ZW as received at KX5JT

Hellschreiber remains on my favorite mode list.

Simple, ticker-tape style, retro, steampunk… all are said to apply to the Hellschreiber mode.

The Flex-5000A does Hellschreiber well – https://k9zw.wordpress.com/2008/12/02/flex-5000a-does-hellschreiber/ – though this time I was using fldigi for the digital program.

Several years ago I put together a longer piece on exactly what Hellschreiber is: https://k9zw.wordpress.com/2008/08/04/repost-hellschreiber-about-the-mode/

Thank you to KX5JT  for sending me the screen shot  of his end of our QSO.

Hope to catch you on Hellschreiber!



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Neat YouTube – Alex OZ9AEC Demonstrates how to decode digital hamradio traffic without a radio

Very interesting demonstration on now to use the Web to listen to Ham Radio Digital Traffic (WebSDR Receivers) and locally decoding it on your PC/Mac/Linux-Box !

The Direct YouTube Video (you can also click above) at:


Decoding digital hamradio traffic without a radio by Alex OZ9AEC

Websites featured in the Demonstration:




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Flex-5000A on Digital – First PSK on the New Flex-Radio at K9ZW

Took a few minutes (would be quicker if I read the directions) to set up the Flex-5000A to use MixW and a neat internal interface called “VAC” (Virtual Audio cables) to set up the Flex-5000A for Digital Mode.

Here is a screen shot:


First Flex Digital at K9ZW

First Flex Digital at K9ZW

I’ve a ways to go to make this all work as I would like it to.

BTW with the speed of the new machine it looks like all my logs could be merged.  I had avoided this on the old XP Box as it was easily overwhelmed whenever my logfile got big.

For details on the setup using MixW and VAC see the Knowledge Base and Manuals at Flex-Radio.



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Just Listen to Me – What do Digital Modes Sound Like?

Our friend John NZ9Z emailed remarking how neat the BARTG resource listed the ARRL Contest Rate Sheet was (BTW Highly recomend you subscibe to the Contest Rate Sheet – it always has something for everyone).

Often new hams and amateurs first starting in Digital Modes ask what does a mode sound like and here is the BARTG Link John NZ9Z mentioned and several others:

The British Amateur Radio Teledata Group (BARTG) wibsite on what the different digital modes sound like:
http://www.bartg.org.uk/Sound%20Files/soundlibrary.htm http://www.bartg.org.uk/modesamples.asp (Updated URL 08 OCT 09)  (MP3 or WAV Samples of: ALE, ASCII, CHIP, DominoEX, FELD HELL, FSK-W, JT65A, MFSK16, Olivia, Pactor, PAX, PAX2, PSK125, PSK31, Throb, SSTV, AMTOR-FEC, AMTOR-ARQ, DRM, MT63, sitora, sitorb, packet 300 baud, packet 1200 baud, and RTTY (170 shift 45.45 baud))

An overview of the range of amateur digital modes together with audio samples by WB8NUT
(WAV Samples of: Amtor, Pactor, G-TOR, PactorII, Clover, RTTY, PSK31, Packet, Hellschreiber, MT63, Throb, and MFSK16)

KB9UKD’s exceptional collections of large number of audio samples of different digital modes, including many non-amateur modes (Nextel, TETRA, Pagers… dozens & dozens):

Sean G4UCJ’s webpage of data modes and WAV audio samples:
http://myweb.tiscali.co.uk/g4ucj/html/digital_modes.html http://www.hfradio.org.uk/html/digital_modes.html (Updated URL 08 OCT 09)

The Amateur Radio link compendiums list more sites or of course you let google be your friend to find for more sites with samples.

Good listening!



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