5C1 New Build Start Up Problem At Rectifier

[rdjones]

Voltages are fantastic, so quiet you don't know it's on. Not even trace of octal hum with 10". A minute of risky 2AM NYC apartment guitar shows it works. Let it rip it tomorrow, unveil it soon. Thanks for the help all.

Excellent !
Most happy to be of help.

"RedDog" Steve

[rdjones]

Now why the hell does this OT have a CT that's shorts the HT?!?!.

In very old designs (1940's) before indirectly heated cathode rectifiers became commonplace, the B+ would be pulled from the centertap of the 5V winding.
This helps a bit with noise on the B+ line by both balancing the filament, and by the series inductance of the winding acting as a choke.

With indirectly heated cathodes that are connected to pin 8, the B+ being pulled from pin 8 allows either type to be interchangeable.

RedDog