Bottlehead Forum
Bottlehead Kits => Legacy Kit Products => Quickie => Topic started by: polyghan on April 26, 2014, 07:55:34 AM
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Anyone have any experience with these tubes? I got these as a replacement from bottlehead (stock tubes were making goofy noises) and haven't been able to find much info on them. What I can say, however, is that they sound great! More tubey than the stock tubes, just the right amount for my setup (XDA-2 > Quickie > XPA-200).
It has markings on 3 areas of the tube, the first is the "RT" logo with "3S4" then "6029" beneath it. In another area, it has two green flags crossing each other with "T" in each flag. The last marking is in white (as opposed to the green of the other two markings) and is two flags/clubs (rounded front edges look like golf clubs), intersecting with four letters above that I cannot read. What I believe is the serial number is in black (PA1 L9B and PA1 L9C for the left and right tubes).
Here is an image I found of them.
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fi.ebayimg.com%2F00%2Fs%2FMTA2NlgxNjAw%2Fz%2F5GgAAMXQLs5RokjA%2F%24%28KGrHqN%2C%21lMFGT%2B8%2BQD%29BRoki%2Byz2w%7E%7E60_57.JPG&hash=373227210b56dc34a6b5c9d8c65a63f1eeab0bac)
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I believe they are Radiotechnique made in France. I found them to be very clear and detailed, not as warm or as strong in the low end as some other brands, but one of the best for clarity IMO.
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I have some 12AU7s made by them. I have the same experience as mcandmar, very clean, clear sounding tubes.