Input problem

[EFK]

Maybe it's blatantly obvious (or maybe I'm wrong) but the way this seems to me is that somehow the signal from the treble input is going backwards through that 22K resistor and going to ground through the switched normal jack instead of shooting on into the grid of V1. I swapped out the 22K for a 100K just like the other channel ( which now works) but this one still doesn't work. I also replaced the treble jack with a new one, still no difference.

[EFK]

I think I'm about to become the poster boy for measuring components. As it turns out, the 100K resistor I was using on this channel was apparently accidentally stuck in the pack of 100K resistors but was in reality a 10K. I was staring at it for about the 30th time I realized the multiplier band was wrong. Duh!!!!

OK, all that aside and now that everything works - THANK YOU!

As a secondary note, I seen some weird things on Valco amps but why would someone use 22K resistors there when they preclude the treble inputs from working? And, I have to wonder, why is the value here so critical? As I mentioned, I tried 47K but they also were too low a value and still did not work. It took a 100K there to make everything work. I'm a bit confused as to why the input resistance needs to be @ 83K minimum (which is where it works out w. the 100K and 470K in parallel) when other amps such as a Marshall or Fender typically work through a 34K high/68K low input resistance? And some Boogies are what - like 10K?

[Enzo]

Only question on my mind is how does a 10k resistor or any other make a 470k resistor measure as zero ohms.

[EFK]

Interesting question - maybe the 10K was bad? I'm usually very careful with heat when soldering components, especially carbon comps, but sometimes on these old tag strips it takes a bit more heat or a bit of flux to get the new solder to stick. Maybe I cooked it?

[Enzo]

Not likely. In my 55+ years of soldering, I have NEVER seen a shorted resistor. I have seen some reduced to charcoal that read lower than they should, but that is rare. Heated resistors tend to get higher in resistance, not lower. Zero ohms is a short, maybe wires touching where you can't easily see, maybe a tiny bead of solder, maybe wrong position, who knows.