Took some official readings under the hood of the ST-70 (stock) while powered and playing music, and I found that most voltages were close to the design levels. However, the AC voltage on EL-34 pins 2 and 7 should be 6.4 but it measures 3.3 VAC. Same anomaly on 7199 pins 4 & 5, both channels, should be 6.5 but reads 3.3 VAC.
Anyone have a clue as to why this would be, and why it matters? Thanks in advance, David
Anyone have a clue as to why this would be, and why it matters? Thanks in advance, David