I have purchased new tubes as well as NOS from Viva Tubes. No problems whatsoever! Always well packed, as described and delivered promptly.
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@richardp01, I have purchased KT150’s - QUAD tubes from Viva Tubes recently. They shipped the tubes promptly, well packed and no issues with tubes so far. You may find following guide useful, https://www.tubesforamps.com/6550-tube-selection-guide I am going to be comparing stock EH 6550C with a pre production 2012 SED 6550C Svetlana "winged C" tube in next couple of weeks. |