I am currently in the process of rebuilding my HK Citation I preamp and I noticed that the grid bias resistor in the phono stage on both channels (R10 on schematic) has a 2.2 Meg resistor parallel with a 680K (about 520K) instead of the 560K shown on the schematic. The other 4 560K resistors are all correct. The resistors look original. My question is why would anyone do this? R26 is 560K. I know that this is still within the 10% tolerance or the resistor value but someone had to do this deliberately and I am just wondering why.
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Didn't have a 560k resistor? it is not important. If you have one 560k resistor replacet it, but it is not imprtant
It may have been some kind of factory tuning for best performance,I would check if they are in tolerance,if good I would leave them.
Jim McShane is THE expert about matters concerning tubed H/K Citation equipment. Give the man a nudge.
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