Originally Posted by EniGmA1987
If I wanted to use this amp with just a single mono input, and output to both left/right headphone (still mono signal since 1 input) could I basically just have the one input go into a mono potentiometer and the output for that would go into R14 and R15 and leave everything else the same? Im looking at this schematic posted a couple pages back that I assume is the same design as the PCB boards:
I want to use this as a cheap little tube amplifier for coming line out of an electric guitar and to amplify the signal so it can be listened to on headphones nicely for nighttime playing.
I am not an expert, but I would populate only half of the board and use one tube and one MOSFET. No need to have both tubes and MOSFETs running to process the same signal. You would spend only half of the parts money. That of course unless you want to rebuilt it later for stereo use.
Even cheaper would be something like this: http://www.kitsrus.com/pdf/k87.pdf. I have built this amp into a small plastic enclosure and run my guitar thru that. It worked just fine with my 600 Ohm AKG cans. But that's a bit off topic.