OK, bought myself a Mk1 706 with a strange fault. With the PL-259 put into the SO-239 socket the recpetion on the radio is perfect, connect the plug all the way so the antenna shield is connected to the radio it goes deaf. It doesn't make any difference what is connected to the plug, in fact I connected a short patch lead with nothing attached to the other end, sure enough, level raises as soon as you connect the pin, slightly connecting the shield and it goes again. I've tried connecting the sheild really lightly to eliminate the possibility of a loose SO-239 and straight away deaf. Hopefull this video will demonstrate the problem. (click below) http://s1134.photobucket.com/user/2...A-15766-00000A2D71F01A4F_zpsf75fabde.mp4.html Anyone?