Bottlehead Forum
General Category => General Discussion => Topic started by: vetmed on April 01, 2013, 08:27:43 AM
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I have the chassis with PT and working power supply. Have tried unsuccessfully to use 10/10Y/vt25, was always too noisy. I know that the power supply gives me about 400V, but not sure how much current it can provide. 45s or low current 2A3? TIA for any and all ideas.
Robert Lees
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The high voltage supply can provide 35mA per channel, maximum.
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Thanks for that, very helpful.
Regards
Robert Lees
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Robert,
Some of the laternative tubes I'm considering for my s.e.x. 2.0 are the el84 and the 6v6 (both in triode mode), the 12b4a (very nice clean tube, but would need a driver stage as it is only a single triode in each bottle), and the 6bm8 -- like the 6dn7, a gain and power tube (pentode, so again, triode strapped), which is also a really nice sounding tube -- one of the few designed specifically for audio use.
Not sure which I'll go with, but also some of the related tubes could be considered -- 6k, 6y6 as well, also some decent sounding tubes. Of course, all but the 12b4a are pentodes, so they will have a characteristic sound somewhat different than the triodes.
HTH,
Jim
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Well I no longer have the original transformers or plate chokes, one of those things that went missing in a recent move :-[ What I was attempting before was using vt25s with a 10K parafeed tranny, but I could never get it quiet enough. Of course between hum pots and filament transformers there is not a lot of real estate left for a driver tube so I built an external one using a 6sl7. That part of the experiment seemed to work very well.
I was thinking of using a series transformer if I can find one that fits. Filament transformers could then be mounted where the plate chokes used to live. Of course I am talking about DHT here, perhaps 45 or 2a3?
Regards
Robert Lees