i have a galaxy saturn everything on the saturn work great except for the echo when i first got this radio off someone else i tryed the echo flipped the switch and got a generated pulsating sound that absolutlet took all the modulation and it only happens when you key the mic with gain on radio and mic totally off!!! i took the radio to my local tech he went thru it couldnt find nothing told me that me echo board was shot!! ok so after alot off research i located another echoboard when it got here i plugged it in with the same result i am clueless as to whats causeing this but i would like to get it fixed so i can use echo so all the techs out here please scratch your head and figure this out for me!! my freind told me he had a mod kit put in one of his radios and it done the same thing could this be possible for my radio and where would i look to see if this was done to my radio???