Having trouble getting the 6AG7 oscillator in my Globe Chief to oscillate and drive the 807s. I replaced the 6AG7 tube with known good tubes and no oscillation. The components in the circuit check good but it still doesn't work. If you have any ACTUAL HANDS ON EXPERIENCE with the 6AG7 osc in the Chief, any suggestions and assistance will be appreciated. Thanks and 73, John, K5PGW