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2nd January 2012, 07:41 PM
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diyAudio Member
Join Date: Mar 2008
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GU50 Prototypes
Some time ago, me and friends decided that we make a few prototypes with GU50. The idea was to test as many different combinations. For input tube we decided for 6SN7, 6SL7, 6N1P, 6N23P, 6N6P, D3a, 6C3P, ECC83, ECC85, ECC81.
We made some SE prototypes, one of the PSE and the PP one. As the input tube we test: D3a, 6C3P (the best two), 6N23P, 6SN7, 6N6P (also very good - not enough gain), ECC83, ECC85 (not so good). The project is continuing. Now I'm working on the development of housing. We found that the GU50 is one of the best, for me better than EL34 or EL84. A couple more pictures of prototypes: |
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