a real challange?

[Kevin Kuehn]

Originally Posted by Yamamaya42

voltages are all wrong, no surprise there with the crazy voltage bleeder used.

routing the chassis ground THROUGH the focus coil and adjustment from the source xformer center tap to the voltage bleeder is... weird.

they also seem to route main bias through horz and vert centering controls to the bleeder,, strange setup.


having dirty tube pins/sockets does not help as this was meant to be loaded.

B+ center tap passes through the focus coil and a few series resistors which creates a b-(negative) supply which is used for biasing various circuits. Sams often tells you to reference b- when taking voltage measurements. There may be a similar note in Riders, but I have not taken the time to look. It's confusing to look at but the circuits function basically the same as if referenced to ground. The key is to realize the reference is often not chassis ground when taking voltage measurements.