I'd use this as an opportunity to audition a couple current phono preamps in my system if you haven't already before even considering repairing the HK. If the sound quality is superior to what you're getting from the HK you'll have your answer. If you don't have a dealer with something in your price range to audition you can try Audio Advisors or others that offer 30-day money-back guarantees if you aren't won over. There are several sub $300 pres from the likes of Cambridge, Vincent, Parasound, NAD, etc. that get good reviews and would be worth trying just for reference if nothing else. I'd read the reviews and pick one that sounds like it has the characteristics that are important to you and give it a try (but be aware most pieces will require 100 - 300+ hours to break in before you can accurately assess them). Also, last time I got something repaired they wanted something like $100 just to look at it that could be applied to the repair if I went forward, but if not I was out 100 bucks. Just something you might want to check on if you haven't already. Best of luck.