I'm sure this has been asked before but the search function is down. As you may know, the HK AVR-520 does not have a phono input. What will I need to use a turntable with this receiver? Just a phono preamp and an interconnect? Is there anything special I should look for in a preamp? I've seen some cheap ($16) RCA ones on eBay - will that do the job? Thanks for your help.