Hi guys, I'm still a novice to tube amps. Good at soldering but just learning electronics. Anyway I've got this Sherwood S5000 ii that I'm rehabbing. It was in original condition and still had the original tubes. I've been going through it as much as I can measuring voltages, etc and working up a plan of what I need. I was measuring the tube socket pin resistances on the preamp section, 12ax7's and I'm running into some issues with the pin 1's and 6' on all tubes. There is a side note in the manual stating that those pins should be "measured from the output of X1" X1 is a diode coming on the transformer 160VAC. So i've tried to get resistances trying to measure it every way I can imagine. I've tired bother sides of the diode, and I've tried to ground as well but theissue I'm having is that the resistance values just keep creeping up slowly. For example tube socket V1 should show resistance of 370k on pin 1, but it just keeps going up past that and after a couple of minutes I just give up because it doesn't ever seem to stabilize. I probably let it go to 800k or so before giving up bu its clear either I'm doing something wrong or there is something wrong in the circuit. The same pattern emerges on both pin 1 and 6 on all of those tube sockets. Also, I'm not sure if tubes should be in or out and I've tried both ways. I will say most of the resistances are stable regardless of if the tubes are in or out. I'm attaching the service note which has the circuit diagram and the resistance values. Please note the circuit diagram is cut up into 3 parts and there is some overlap where they cut off the pages. I had to zip the file because it was too large to attach otherwise. Thank you.