While the Harvard and the Princeton may have similar sounds they are quite dissimilar in terms of their employed thechnologies. The Harvard uses a 6AV6 for its single pre amp gain stage and the the Princeton Reverb uses 3 7025's and is much higher gain. I'm guessing the Harvard would be a lot more crunchy and have a lot more of that compressed middle with the singing sustain you get with the Tweed Fenders.
Regarding Gibson amps, anyone know what amp Kim Wilson uses on Tiger Man? I seem to recall it being a GA-90 stereo but I'm not sure. fjm
