Which tubes are Drivers on Atma Spheres?

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I have MA1s w/ 5 small tubes. I am interested in trying different tubes. Which tubes are the driver tubes? I assume they are mirror imaged as the rest of the amp, are they on the power tube side or the meter side? (since R & L are meaningless) Also, do certain tubes need to be identical, i.e. do all driver tubes need to be identical (brand, GTA vs. GTB), or is it safe to plug any 6SN7 in any location?

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Topic - Which tubes are Drivers on Atma Spheres? - MikeC 07:56:59 05/13/05 (2)

Re: Which tubes are Drivers on Atma Spheres? - Ralph 23:41:46 05/13/05 (1)

Thanks!! - MikeC 16:41:21 05/14/05 (0)

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