For those that want to protect their pre-amps from transmit overload/burnout, you might want to check this page out: http://www.iceradioproducts.com/reconly.html#rflimiter Go all the way to the bottom of the page and check out part #196 and 197 Coy -- Coy Day, N5OK 20685 SW 29 Union City, OK 73090 405-483-5632