[mikethedruid]

Tonight I tested all the tubes. I started out testing them using my Simpson 305. They all tested good except the 6SG7. I had another 6SG7 in stock, so I tried that and it also tested bad, which I found very odd since it was boxed and had I had tested it recently and it was GOOD. Now, all the 6SS7 tubes had tested good. These tubes have the exact same pin out. They are also very similar pentodes. Oddly, the settings in the Simpson 305 list are somewhat different between the two. I tried testing it as a 6SS7, but again, it tested bad. Finally I tested it on my Eico 628, and it tested fine, as did the other 6SG7. Interestingly, the Eico does not list the 6SS7, but, when I tested one of them using the exact same settings, it also tested good.
6SG7 data sheet
6SS7 data sheet
At any rate, I have a full set of good tubes to use once I get all the rest of the problems sorted out.