• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Svetlana Svetlana EL509-II: Please disregard all my statements about this tube!

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Dear all,

I am sorry to have caused doubts about the Svetlana EL509-II tube. It has become evident that the way I conducted the measurements was NOT appropriate, and did NOT show the actual performance of the tube. I ask you all to ENTIRELY disregard what I said about the tube in the quotation of my letter to CB posted above. I am very sorry about this, and any trouble it has caused for vendors as well as builders. I should have learned more about testing procedures before criticising this or any other product.

Those of you who have ordered, but changed your mind, please reconsider. I made a terrible blunder in communicating measurements without having any other tubes to compare with.
Again, please accept my sincerest apologies!

Best regards,
Morgan Lundberg
 
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