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#1
Posted to rec.audio.tubes
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triode/pentode switch in ab763 vibroclone
hello I'm building a vibroclone, I have a hole for the ground swicth I
won't be using, so I can install a triode-pentode switch. 40w, Ab763 circuit, 2x6L6. Can it be done? do you have links/ schematic or pictures? Do I have to change the output transf.? what switch to buy? merci eduard |
#2
Posted to rec.audio.tubes
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triode/pentode switch in ab763 vibroclone
eduard wrote
hello I'm building a vibroclone, I have a hole for the ground swicth I won't be using, so I can install a triode-pentode switch. 40w, Ab763 circuit, 2x6L6. Can it be done? do you have links/ schematic or pictures? Do I have to change the output transf.? what switch to buy? A link to a circuit diagram for the vibroclone would be helpful. Often, all that is needed to convert from pentode to triode operation is to swap each screen connections from the HT to its respective anode. 6L6 have max screen voltage much less than max anode voltage, so in some circuits you need to be careful. General advice seems to be that they can cope with exceeding screen limit when in triode or UL. There may be a max anode voltage beyond which this stops being true. Its a common question but I forget the answer. No doubt someone will say. cheers, Ian merci eduard |
#3
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triode/pentode switch in ab763 vibroclone
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