#1
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6sn7 vs 12sn7
Would a 6sn7 work in place of a 12sn7 ? I know the voltages are different but what about the currant.
Last edited by timmy; 09-10-2017 at 03:05 PM. |
#2
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Depends upon where you are going to use it. A 6SN7 filament current is 0.6 amperes. Substituting it in a series string set with 0.3 ampere tubes to replace a 12SN7, it will only have about 3 volts across the filament so won't heat up properly.
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#3
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According to this
http://www.radiostation.ru/tubes/6SN7.pdf They are both 3.78 watts; 6SN7 draws 600mA at 6V, 12SN7 draws 300 mA at 12 V. So the answer generally is no. In a parallel circuit, it will draw double current at 12 volts and burn out. In a series circuit, it will decrease the total resistance so that the string draws somewhat more than 300 mA, but this will still be too little for the 6SN7. |
#4
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A tube with a heater centertap like the 12AU7/AT7/AX7 family, can be configured for either 6 or 12 V.
http://cdn.instructables.com/F6L/JVN...EM0B.LARGE.jpg |
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