Hello, I have a Knight 600 tube tester, would like to test a KT33C tube. I know KT33C = CV1503 = VR503 , but cannot find in the chart , anyone can help ?
Well, as I said the settings for the 25A6 should work, and I'd feel pretty confident that they will. But I'm saying that based on the information I cited, and therefore I can't be 100.0% certain.
According to an older Sams Tube Substitution Handbook I have, the 25A6 can be substituted for the KT33. According to references on the web the KT33C is identical to the KT33 except that the KT33C provides a filament center-tap connection on pin 1, while pin 1 is unconnected on the KT33.
Therefore I suspect that settings for the 25A6 will work for the KT33C. I don't guarantee that, however :-)
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