This is a superb New Old Stock Russian 6J1-P pair of miniature pentode valves for preamp stages of hi-fi audio amplifiers. Used in current production valve preamplifiers such as the Little Bear and Little Dot. These Russian valves were built to a very high quality in the 1960's through to the 1980's and are an ideal upgrade for the valves supplied in the Little Dot Mk II. Allow 24 hours for burn in to develop best results. Not gain matched.
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