I've been using a MFJ 1275 with no problems and everyone in our radio club hates MFJ products. They kept saying " GET A SIGNAL LINK, GET A SIGNAL LINK, GET A SIGNAL LINK, they'll work better than that junk MFJ....So I got signal link, brand new and IT DOESN'T WORK!!!!tried many times to get it adjusted and does not work, it's a peace of trash!!!my mfj 1275 out preforms those signal links. Their junk!!!! $89.00 dollars wasted!!!