Yagi antenna

Fellow experts, I need your help. One would be able to construct a simple Yagi 3-element antenna for frequency 173 MHz (approx 150 do 200 MHz)? I plan to connect it to the Icom IC-R5 receiver (but I don't know yet, can the antenna be changed there?). Please also suggest an indicative price. Could someone give me better advice? (but cheap) technical solution to my problem? I need it for telemetry research on bats. Many thanks in advance for your cooperation.

Peter Kanuch
Ustav ekologie lesa SAV
Sturova 2, SK-960 53 Elected, months for binding reasons
phone: 045-5320313
fax: 045-5479485
milk:kanuch@savzv.sk
http://www.netopiere.sk