Tube Amp Archive

I had to stop and think through this at one point but I don't believe any of the resisters are redundant. If you draw both the hi and lo inputs completely with the way they switch when plugged into one or the other, I think it will be more clear. The 5E3 is the same way. Look at this schematic. Plu...

tictac wrote:those are 680K resistors not 68K....

Sorry, maybe the orange somewhat like yellow, but it's real 68K.

hello :D I got a Bruno Underground 30 head with two channels. The input jack of channel I is mounted 3 resistors on it(the photo following). It's not like the Low input of a traditional Hi/Low inputs. The 1M resistor seem redundant, is it? The two 68K resistors just form a voltage divider, right? Th...