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RE: Buy tubes from the right vendor that meets your needs because they do sound different.

I've noticed this is especially true for small signal tubes such as the 12AX7. However, my primary amp uses a pair of 6BL7 as the input/phase splitter, and a quad of 1625 tubes for each monoblock. There are a lot of 6BL7 types out there, and they sound pretty similar, not a lot of difference.

Same goes for the 1625 tubes. I have a large cache of these, mostly from the 40's and early 50's. They all sound very good, be they National, RCA, Sylvania, or Hytron. The Sylvania tubes are built like tanks, and Hytrons are all coated. All of them sound very good. To me, the 1625 is the best bargain in power tubes by a wide margin. It's like a 6L6 on steroids, with superior build quality. The key to getting the best from the 1625 is run them in pentode.
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Satchel Paige

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