Several months of cooperation of radio amateurs from Banská Bystrica and Zvolen under the leadership of Igor OM7AC resulted in the placement and start-up of a new amateur radio transmitter in the 70 cm band at the elevation "Hvezdáreň Vartovka nad Banská Bystrica".
Parameters of the OM0OUH converter
Brand: OM0OUH
TX 439.275 MHz
RX 431.675 MHz
CTCSS: 88.5 Hz (RX/TX)
Power: 5W
GPS coordinates: N 48°43´04.4″ E 19°09´13.7″
Altitude: 568 m. n. m.
Antenna height above the ground: 7m
Locator: JN98nr
The basis for the small local converter is the well-known and popular design from the old NMT mobile phone "Nokia 620i" and the duplexer from the "Nokia DB10". Duplexer provided by Igor OM3TIB and retuned by Janko OM7OA. As an antenna, only a short omnidirectional antenna "Diamond X30" is used, as we were limited by the height of the antenna, which could not exceed the lower base of the dome with the telescope. In the future, after mutual agreement with the owner of the object, it is not excluded that the transferor is also involved in the echo line, or the use of other options.
Dušan OM7TW + Janči OM7TY