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Oct 9, 2018 - When you plug in headphones (4) the resistor R2 is disconnected from. For a mono amplifier to stereo headphones wire 1 to GND. This is a basic no brainer circuit - note there's no resistors and caps - and this was the type of circuit used in the 20s if you wanted to ditch the headphones. I built it to match a similar specific 2 -tube BC/SW regen receiver and I can get room volume out of a crummy horn speaker on a moderately strong SW station.
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I've played guitar for.oh man almost 2 decades now that I think about it, that's kinda terrifying. All existential dread aside, being a broke teenager kind of forced me into learning how to fix my own stuff - guitars and tube/solid state amps.
Now i'm getting into decent audio gear and i've been thinking of building myself a tube preamp/amp. Seeing diy tube builds like this is pushing me towards actually doing the damn thing. Mind if i pm you at some point in the future to potentially pick your brain about this build?