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Do It Yourself (DIY) paradise for tube and SET project builders.

Re: Two filaments on a battery: bad luck?

Thanks for the good word. You have me thinking two cells on each 30,small dropping resistor. 1000mA/hour's give me about a week between charges. 2500mAh gives me much more.

As for keeping a charge: I've seen some charger circuits that are intended to run when the power to the amp is switched off. Not sure that I'm comfortable having something I built running 24/7 charging up whatever gets in its path...I think I'll stick with swapping batteries out to an external commercial recharger as the time comes.

I'd like, though, to have some sort of simple low voltage indicator for the flaments (appart from the filaments turning off being their own low voltage indictor). Maybe just an led to light when the voltage drop hits 1.8 over each filament or so. Any thoughts?

Thanks everyone & thanks fatbottle for jumping in on both my questions. (this thread and one from a week or so ago)


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