I seem to be having a problem with my rega planar 2. It works fine when I play a record at first but after a very short period of time I get this loud coming though completely overbearing on the lp sound. It's a low frequency buzz and It becomes more pronounced when I touch the tone arm. It sounds like an earth problem or something but I can't find any wire that shouldn't be where it is. Also a second question if I may. No that's not it. Are Ortofon cartridges any good such as the the one's Richer Sound's have Ortofon Concorde about 60 STG 90 euros Ortofon Pro Cart " 30 " 45 "