I spied an old Heathkit stereo amplifier today. I noticed that it had some Raytheon 6L6GC tubes in it along with at least one (probably 2) Mullard ECC83. My question is this the 6L6GC tubes have that octagon shape that says 6L6 in it on the glass, does that mean they are really RCA's? They had side getters. I think I can get it for $125 all in but the guy doesn't have any idea if the tubes are good or if the amp even works. The tubes look good to my eye and the amp appears to be in decent shape physically. I didn't want to get to interested in it yet though. I'm in for a little adventure so I might scoop it up. Is it worth it? Edit: Looks like it is a Heathkit A9C amp.