VALE VK6DXI – Co- Founder of VKCC

Posted by Trent, VK4TS

VALE VK6DXI (SK) – Co- Founder of VKCC





“It is with great sadness that we inform you that Mirek Rozbicki has passed away today from a heart attack and brain aneurysm. He will be greatly missed by all his family and friends. We thank you for the messages we have already started to receive and will receive at this difficult time.

Rozbicki Family”


RIP Mirek you will be sadly missed



3W6DXI MIREK ROZBICKI Ho Chi Minh City- Saigon
7X0DX Mirek Rozbicki Bechar, Naama, Algiers
9M8DX Mirek Rozbicki VK6DXI 9M8DX Kuching East Malaysia
9M8DX/2 Mirek Rozbicki VK6DXI
FK/VK6DXI Mirek Rozbicki Oceania
VK6DXI Mirek Rozbicki Mindarie WA
VK9XU Mirek Rozbicki op VK6DXI
Z21DXI Mirek Rozbicki SP5IXI VK6DXI Bulawayo






CQWPX SSB 28th 29th March 2015

Posted by Trent, VK4TS


The CQWPX Contest fires up this weekend – band conditions are looking OK with a bit of volatility around.

Perhaps to fire up a few of you need to listen to a contester working a pileup at 430 QSOs per hour :-)

This is K9PG @ ZF2MM

The longer you listen to the techniques the more you pick up – learn from one of the best.



Russian Dx Contest 21st 22nd March

Posted by Trent, VK4TS

Again the Russian DX Contest clashes with the John Moyle – So if you are on HF there are plenty of active international stations to work.

With great pleasure The Russian DX Contest Team invites you to take part in RDXC-2015.

The event is 24 hours long and takes place March 21-22, 2015 from 1200z -1159z.

We promise you great activity from almost all Russian regions.

For those who care the RDXC-2105 is a qualifying event for WRTC-2018.

Keep in mind the regular log deadline is 14 days following the end of the contest. However, if you are hoping for a spot in the Top 3, you must submit your log within 36 hours of the closing bell and logs of the leaders must show the frequency of every QSO with a minimum resolution of 1 Khz.

The e-mail address for log submission is Our robot will check your log and you will receive a confirmation e-mail. You can confirm we’ve received your log at

John Moyle Field Day weekend 21st 22nd March

Posted by Trent, VK4TS

This weekend sees the return of the John Moyle Field Day weekend:

Aim Of The Contest

The aim is to encourage and provide familiarisation with portable and field operation, and provide training for emergency situations. The rules are therefore specifically designed and focussed to encourage field operations.

Read more…

VHF UHF Contesting- how can we give it a shot in the arm ?

Posted by Trent, VK4TS

VHF UHF Contesting- how can we give it a shot in the arm ?

Is it ham radio that needs the shot in the arm ? Inactive repeaters , few stations on most bands, stations with no antennae….

Is it too late to reverse the trend ?

Does VHF UHF contesting need to categorise Microwave and the rest ?

Has the Microwave focus disenfranchised too many ?

Why don’t F Calls partake ?

Is the Dx based scoring fundamentally flawed – Should it score only after 100 km ? And no more after 1000km ? Something like base score is ten points and then going up after 100 km and no points for under 25km ?

Should the field days be renamed Activity Days and all stations compete in the same categories ? Hilltoppers would be not unlike expeditions in HF contests… and have that advantage of location location location

Discussion is open on Yahoo Group, Facebook Group and VK Logger


CQ WW Online Database extended to 1953

Posted by Trent, VK4TS

N2NC and team have now extended the CQ WW online database back to 1953. Hard to believe there were only 167 phone entries and 187 CW entries back then.

CQ WW Online Database 1953-2013


Total Phone entries 168,423


Total CW entries 166,369


One cool thing to do is to see the winning score every year for any combination of country/category.


Randy, K5ZD

Trans Tasman Low Bands Challenge

Posted by Trent, VK4TS

Trans Tasman Low Bands Challenge


Prepared by VK4TS and VK4SN

Last amendment 6th February 2015


1. Contest Introduction

This contest is to encourage Low Band Activity in Australia and New Zealand – The applicable bands are 160, 80 and 40M. The modes are SSB CW and Digital (RTTY and PSK only)

2. Objective

Amateurs in VK and ZL will endeavour to contact other amateurs in VK and ZL.

* VK and ZL, means any station operating within Australia or New Zealand and their external territories.

* Points are only awarded for valid contacts between VK and ZL stations.

The contest is made up of 3 individual two hour sessions – you are able to work another station once per band and mode in every session. Every different Prefix used by VK or ZL stations is a valid multiplier and credit can be claimed once per band per session.

3. Contest Date & Time

The contest is held on the Saturday night of the third full weekend of July Start Time is 08:00 UTC and finish time is 14:00 UTC

4. Categories

A. Single Operator – High Power All Modes All Bands
B. Single Operator – Low Power (100 watts)
C. Single Operator – QRP
E. Multi-Operator – Single Transmitter
F. Multi-Operator – Multi Transmitter (One per band)

* QRP stations are limited to 5 Watts average (CW/RTTY/PSK) or PEP (SSB) at the transmitter output.

Each category will have High Scores for SSB, CW and Digital awards.

Any station in Single or Multi Op may win the Single Mode awards – BUT Multi ops will not be eligible for single op categories.

NOTE: The Mode scores are purely on the highest score and may be from a partial log. You do not enter SSB only – rather the log is determined as having the highest SSB score.

5. Permitted Bands

Contacts may be made on 160M 80M 40M in SSB, CW and Digital (PSK and RTTY Modes)

NB. PSK and RTTY are the only allowed digital modes and are combined, not counted separately.

6. Multi-operator Stations

A. Multi-operator single transmitter stations are only allowed one transmitted signal on air at any time.
If you are using three transceivers to scan the bands, simultaneous transmission will reclassify you as
Multi Transmitter(Category F.) – your responsibility to stop multiple transmitters operating.

B. Multi-operator Multi Transmitter stations
a. Are only allowed maximum one transmitted signal per band,
b. Simultaneous transmissions on different bands are permitted.
* Multi-operator stations are mixed mode only.

7. Contacts

A. Suggested Call: “CQ TT”, “CQ Contest”, or “CQ Test”

B. Exchange: A valid exchange consists of RS(T) followed by a three figure serial number starting at 001 for each band.

C. No cross band contacts are allowed.

D. Exchange of contact information via satellites, telephones, repeaters, Echolink, IRLP, or the internet is not in the spirit of the contest and is banned.

8. Scoring

All contacts are worth one point – Add the number of contacts made in the two hours and multiply by the different prefixes worked on each band in that two hours.

NB external territories count as one prefix – eg VK0 counts as VK0 and not the separate DXCC same as for VK9

e.g. 160 80 40 total contacts 50 X 35prefixes (total of each band added) = 1750 points per hour

Final Score is the addition of each two Hour 3 two hour blocks starting at 08:00

9. Logs

Logs are due in within one week of closure of the contest.

Super Check Partial

Posted by Trent, VK4TS

A database files is available at: Read more…

Super Check Partial database

Posted by Trent, VK4TS



Hi Folks!


I am planning to release a new version of the Super Check Partial database files on October 14th 2014 .  I am requesting your logs for input to the database files.  Please send your logs for this release before January 31st, 2015. Read more…

K6TU.NET adds support for generating Terrain Profiles

Posted by Trent, VK4TS

Woodside, California – January 21st 2015:


K6TU.NET adds support  for generating Terrain Profiles for use with ARRL HF Terrain Analysis tool


Stu K6TU’s propagation-as-a-service website at now provides you with the ability to generate a terrain profile for use with the ARRL HF Terrain Analysis (HFTA) tool.


Written by Dean Straw, N6BV, HFTA models the performance of horizontal antennas over the actual terrain surrounding the antenna and graphically displays the results.  HF antennas are impacted by terrain due to reflection and diffraction effects in the near field which can significantly enhance or degrade antenna performance.  Modeling these effects allows optimum antenna placement and selection of height above ground.


To support this modeling, the user must first obtain a terrain profile which describes the height of terrain around the antenna location.


Before Stu’s addition to K6TU.NET, the user had to obtain digital elevation data for their location and then use a GIS tool like MicroDEM to generate the profile.  This process is cumbersome and time consuming as the source of the data must be located, downloaded and then processed with MicroDEM before HFTA could be used.


With K6TU.NET you simply login to the site and fill in a Terrain Profile Request describing the location of the antenna in latitude and longitude.  Clicking on the “Generate Profile” button causes the request to be processed by the site in the background usually within 2 to 3 minutes.  The site sends you an email when the Terrain Profile Request is completed.


“The addition of this feature to K6TU.NET is superb!” says Trent Sampson VK4TS, going on to say “The process of getting terrain data was the bane of using HFTA and Stu has that nailed.  In a word, FANTASTIC”.


In addition to generating Terrain Profiles, Stu also has a utility he calls HFTASWEEP which uses HFTA to generate a detailed model of the antenna for use with K6TU.NET propagation predictions.  The combination of modeled antenna performance together with use of the effective-SSN (SSNe) enables “near cast” predictions to be made for contest and DX strategy planning.


Terrain Profile Requests are available to any user with a registered account on K6TU.NET at no charge.  A subscription to K6TU.NET is NOT necessary to obtain a Terrain Profile.  Stu’s site has copies of both the USGS National Elevation Dataset (for the United States) and the NASA Shuttle Radar Topography Mission dataset (Outside US with data for the world between latitude 60 South and 60 North) enabling fast turnaround of requests.


For more information visit Stu’s site at


Stu Phillips – K6TU