04-27-2026, 10:32 PM
Well, yes it seems like you do.
I never worked with these radios, but the 67V is the 2nd DET B+ (detectors are often supplied with lower voltages), -3V is the pushpull grids' bias and -7V is the pushpull driver and the DET-OSC grids' bias.
Good news is, the neg. biases as well as the Det B+ do not draw a lot of current, especially biases.
And 67-1/2 V is there for a reason - it is middle of the 135V, so they probablyt use two sets of the same batteries and take the 67-1/2V from where they connect to each other.
I never worked with these radios, but the 67V is the 2nd DET B+ (detectors are often supplied with lower voltages), -3V is the pushpull grids' bias and -7V is the pushpull driver and the DET-OSC grids' bias.
Good news is, the neg. biases as well as the Det B+ do not draw a lot of current, especially biases.
And 67-1/2 V is there for a reason - it is middle of the 135V, so they probablyt use two sets of the same batteries and take the 67-1/2V from where they connect to each other.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
