OL4A callsign of OK1KIM is used in contests - both on VHF/UHF and HF.

The operation on VHF/UHF takes place on Lesna / 920m ASL in JO60RN, where you can recently find 8 towers ranging from 8 to 49 m. The antenna setup there varies with time from ZERO right now to 528 elements on 2m in the summer 2008.

The operation on HF takes place from Brezina - the station owned by OK1RF/OK1RI in JN79KH. Here you can find also 8 towers again in the heights from 13m to 52m. Again the antennas varies with time how ever , here the situation is more "stable". Right now - autumn 2009 there is 103 various HF elements, 18 booms in the length from the shortest 7.5m (6el.Y on 10m) to the longest 24m (5el.Y on 40m), total boom length is 238m. Of course you will find there a couple of km of radials and bevereges and similar things.