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• 17:46, 26 September 2023 Jadney talk contribs created page 067-0500-00/Repairs (Created page with "In order to allow my 3M1 to work with 40 V pulses, I added a second resistor in parallel to R104, increasing the quiescent bias point of the 6DJ8. The resistor I added was a 620 kΩ, and the resulting parallel combination measures ~185 kΩ. This now works perfectly in my 564B. It should work equally well in any 560 series scope. You can see the extra resistor piggy-backed on R104 in the last two photos of the 3M1. It's worth noting that the input circuit in the 3M1 a...")