Hello, I would like to inform you about the changes to the converters OM0OVV – 145,600 Kamzík and OM0OUJ – 438,875 V. Javorina.
On OM0OVV, after matching the duplexer, the power was increased to the permitted 10 W from the previous 4 W from the transmitter. Duplexer attenuation is currently 1.4 dB in the TX path. We also had to proceed with the notified change of the activation subtone from 88.5 to 77 Hz to avoid morning interference from Moravian stations at the limit of audibility. The converter is activated by the 77 Hz subtone and during the receiving session the 77 Hz subtone is also transmitted.
We have also experimentally set a mode for stations without a subtone, which can communicate within two minutes after the station with a subtone ends. Thus, you can have a connection through the converter with an older device, but only with the opposite station, which has a device with a subtone, and the session without a subtone must be shorter than 2 minutes. The reach has improved significantly, there are already favorable responses from Prievidza, Trenčín, Zlaty Moraviec, and I personally managed to connect from the car near Turčianske Teplice. Users near Martin and Liptovský Mikuláš also responded.
Another novelty is the radio linking of 2 m RPT OM0OVV in Kamzík with 70 cm RPT OM0OUJ in Veľká Javorina. Linking is ensured directly on OM0OVV, an 8-element stainless steel welded antenna is used, the power of the Motorola M100 line radio is 20 W. Both converters appear as one, communication within each or between them is without annoying delay (linking up to 300 ms).
Echolink for OM0OVV (and thus also for OM0OUB) will be launched in a few days if there are no problems.
Both transmitters are sponsored by the company Radiolan (www.radiolan.sk, paid for the necessary HW for the construction – TRX, antenna, source, battery, box...), Radiolan is an internet connection provider in Bratislava and its wider surroundings. Radio club OM3KII also contributed, and SZR provided a line radio. Filip OM1AI, Toňo OM1AEG, Dodo OM1VL, Roman OM3EI, Miro OM1RA and radio club OM3KII mainly participated in the operation.
Tono OM1AEG