I have an MKIIa with tuner installed in my car as well as a HD Radio head unit. Unfortunately the tuner and the HR Radio do not have very good FM reception. I’m thinking the problem may be the fact both the tuner and the HR Radio are using the same antenna (I have Y cable).

Would a signal booster work to improve reception?

In the old days you could tune the FM receivers by tweaking the trimmer cap. I don’t see that as an option with this new fangled stuff.

I probably should have asked the brains here years ago but I really don’t listen to the radio too much.

Any ideas?