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1. [Amps] Checking 8163s (score: 1): Author: "David H Craig" <n3db@radix.net>; Date: Sat, 11 Oct 2008 17:16:57 -0400; Is it reasonable to test a pair of 3-400s in an SB220 ? If I remember correctly the 3-500 is also a "zero bias" tube - that said, would the slight bias voltage (6.? I forget) in my 220 create a false; /archives//html/Amps/2008-10/msg00057.html (6,385 bytes)
2. Re: [Amps] Checking 8163s (score: 1): Author: "David H Craig" <n3db@radix.net>; Date: Sat, 11 Oct 2008 21:19:13 -0400; Thanks to all for the responses. Wanted to be sure I gave them a fair test before putting them on the display shelf. They are beautiful, but essentially dead tubes. 73 Dave N3DB _____________________; /archives//html/Amps/2008-10/msg00059.html (8,327 bytes)

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