Should i have my Harmon Kardon repaired or replace

Only keep it if it has personal meaning. You can get a better sounding phono pre for the cost of a professional inspection.

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.

i own the same rcvr and sorta agree with all of the above--if you're just using it as a phono preamp you're probably better off with a modern nad/parasound, etc. however, to me it's real value is as an amp/tuner--like raymonda says it's a very good all-in-one unit and would be worth $100-150 to fix for that purpose. it's not very rare, however, and i do see 'em all the time on ebay for very modest bucks.

Thanks for all the advice. I think I will start a search for another preamp.