Hello Head-Fi, I hope y'all are ready 'cuz I have a lot of questions.
So this started when I picked up a pair of 12B4A tubes from an antique store because I was interested in trying out "tube sound" on the cheap. (They didn't have any of the well-known tubes)
After spending some time on the internet, I think I have a very basic understanding of vacuum tubes and schematics understanding from years ago. Seeing as how its so popular, I've decided to try my hand at Pete Millit's Starving Student amp and here begins my questions...
The Starving amp uses 19J6's which are dual triode tubes while my 12B4's are single triode. In looking at the schematic for the Starving though I saw this
To me it looks like both triodes are being used for the same signal, which feels like it would be redundant. Is it or is the a reason?
Next was the heater circuit
To me it looks like the heater is more directly connected to the output audio jack than the tube anode is. Am I reading it wrong? I've never seen vacuum tubes in operation before so I have no idea what I'm doing.
Oh yeah, and I get the capacitors, resistors and whatnot, but this?
What is this, a MOSFET? I don't even know. I have no idea what those things do or how they work.
So that's it for the amp, but i have some questions about the tubes
So the 19J6 looks like this...
While my tube looks like this...
Back to my original question, if the use of two triodes per channel is redundant, would I be able to modify Pete's design to a lower voltage so I could use my tubes? Also, is there something special I should know, it looks like I have two heaters...
Hopefully you guys could help, it would be amazing I could pull this off. Thank you in advance