How to make an Excellent and Cheap UHF REPEATER with 2x Motorola GM340

This Excellent UHF Repeater is made with two Motorola GM340 radios which can be find very cheap in Macedonia, because many Taxi companies using them. I bought two used Motorola GM340 for less than 100 US dollars. The Power supply cost me about 20 US dollars, so the complete repeater is about 120 US dollars. Sound is loud and clear without any difference when compared to professional repeaters from the market which are 20 times more expensive!