This amp was bought off the local internet classifieds by a friend of mine the other day, the owner said it "worked fine" My friend passed it to me to clean it up deoxit the thing and generally see what was what. On opening the top i noticed a missing tube i take this to be a 5AR4 rectifier tube... see the pics below. I cleaned it out a lot and i took the cans off the 12AX7's to photograph them. The rest of the tubes seem original and LOOK ok, the power tubes are made for Eico by Westinghouse, and all the rest are made by Mullard. I have little idea about tube amps so what would be the best replacement for the missing tube at a decent price ? My friend paid $95 for the amp by the way.