EA5HVK

This year, the Santina de Covadonga 2011 Award will include ROS with the following specials callsigns:

This antenna is used by EA5GTU/P during his holidays  in La Manga (Spain). Besides of  this antenna being low efficient on HF, he could contact with YV5MM (Venezuela) with ROS.

And this is an example of how you should not configure your Rig filter. In this case ROS frequencies below 1000Hz are lost in a Icom-7000. However the contact with YV5MM could be completed in the worst conditions.

From 3 August 2011, the new ROS Mode accepts selective decoding and it will not be compatible with the present ROS Mode.

In position ALL decode any message (recommended for SWL operation).

In position RN6AM only decode RN6AM transmissions (recommended for QSO operation).

ROS UHF Beacon active in Ourense (Meda Mountain)

Frequency: 432.097 USB
Power: 5 w.
Antenna: Vertical
Locator: IN62EI
Altitude: 1.325 m.
Sofware: ROS v6.5.6. Beta
Interval: Every 5 minutes

More info: http://www.ea1uro.com/balizas.html

Now ROS can operate directly with some SDR kits, like SoftRock, KTH, PM, Zeta SDR, G4JNT LF Upconverter…. (ask me for inlude new SDR kits)

In Rig Menu, click on SDR if you are using some of these kits.  I/Q processing will be activated automatically.  You need to have  Stereo input or output (Usually, Mic input is mono).

Adjust the I/Q balance using the Phase, Gain and Delay sliders. Configuration is stored for each band. Click on Fine for a Fine Adjust.

If the SDR if shifted in frequency you can use the Offset Slider for a Fine Frequency Adjust too.

For Zeta SDR you have to to enter the LO frequency. 14.318/4 is ideal for using ROS on 80 meters band.

The G4JNT LF UpConverter was tested by his author, Andy Talbot, using the Soundmax Internal Soundcard getting 60dB of image rejection for the ROS MF Mode (137 and 500 Khz USB)

For monitoring the I/Q audio proccessed while you are decoding, click on Monitor. The Monitor audio filter is 300-2700 Hz.

Specials thanks to Dave 2E0DPQ for a lot of test with softRock between England and Spain. He got a complete communication with Argentina on 20 meters with 1 watt and ROS.

Also special thanks to KB9YIG for the Softrock TX/RX kit, and PE0FKO, PA0RWE and IW3AUT for the Si570 support, and  G4JNT for the TX I/Q adjustement test.

Luis Del Molino EA3OG, autor de infinidad de publicaciones relacionadas con la radio, dedica un artículo sobre el modo ROS en la edición de Junio de CQ Radio Amateur.  

En él se critica la actitud censora de la ARRL y se desmontan los penosos argumentos en los que fundamenta.

Since its  foundation , in November 2010, by Manuel Sanchez EA5HJY, the European ROS Club has reached over 500 members in the first eight months !

The ERC #500 is Ec Vink PA3GAN