Very simple test: A very quick and easy test for desense. 2 people and a GOOD dummy load needed. (type NM connection that will attach directly to the bulkhead fitting on the back of the repeater).
Have one person with dummy load in hand at the repeater with a talkie. The second in the field in a poor signal area with a talkie. Confirm poor communications. Next, tell the station in the field to wait a minute while you replace the TX port connection with a dummy load, then give a 30 second test transmission. If the test transmission from the field is markedly improved with the dummy load in place of the transmit antenna there was probably receiver desense. (realizing the TX range with a dummy load is very limited - mainly to the tech in the equipment room). Instead of guessing or speculating, just do the simple tests I mentioned in the earlier post. This takes guess work out of the picture. steve As far the internal cable goes I have never seen any desense caused by cable used in Icom repeaters. I prefer RG142 or 1/4" super flex for short internal jumpers and use this on my SMR trunked radio systems in low power - 100 watts or less applications. Unless there is a reason to do so, I wouldn't change the cables. steve -- NU5D - Nickel Under Five Dollars
