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In Reply to: RE: 6cg7 tube question... posted by onemug on October 05, 2016 at 11:43:15
While this is a little off topic, the 6cg7/6fq7 are the mini 9 pin version of the 6sn7. Of course it will cost less to build a 9 pin version of the 6sn7 because at the manufacturing level saving a penny is worth millions in the long run. So, it was inevitable that the 6sn7 needed to be economized. But for me with a choice between using either tube in a new build i would always choose the octal tube. To me it easier to use the octals as there is more space with the socket. You have way more brand choices with the 6sn7. The tube itself seems to be sturdier, and since the 6sn7 has a older manufacturing record, i believe they were made better. I have not compared the 2 side by side in a sound competition but i would bet on the octal tube to win. regards, Dak
Follow Ups:
If sturdiness is important, look to the Loctal 7N7. Remember, Loctal tubes were intended for mobile applications and are vibration resistant. While the 6SN7 and 7N7 are electrically equivalent, the Loctal version is an all but certain winner in a microphonics contest.
Regardless of branding, Loctal tubes were made at Sylvania's Emporium, PA, plant. Keep the good "press" Sylvania 6SN7s get in mind. You know damned well that Sylvania made 6SN7s and 7N7s from the same "cages", at the same time. Anything else would have been bad for profitability.
Eli D.
I know, Eli, i am slowly collecting them. But right now the ratio of 6sn7 to 7n7 is about a 100 to 1. I don't even know if i will be able to get to try them soon. sigh, so many tubes, so little time.
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