I purchased a galaxy dx77v for 50 bucks figured it was a good deal it works good and all everyone tells me it doesn't sound as good as my old radio (dx33) but I got curious and opened up the new radio and it looks like it has had a lot of work done to it one thing it has is a mrf477 and here is my question is that a good final for that radio and why would some one go through all that trouble to put it in there