offhand I don't remember which way the diodes go, depends on exactly how the supply is wired up. Per the service manual, the anode side goes to the first cap and the center tap on that winding is grounded. I've seen others where the diodes face the other way but the diodes are grounded and the center tap of the supply connects to the bias supply instead of ground.
If yours uses a grounded center tap, the diodes are backwards. It needs to have negative voltage at the first cap. Would be worth removing the 7868 output tubes and confirming that when you rebuild it. Without negative grid supply those tubes will get very unhappy in a hurry.
If yours uses a grounded center tap, the diodes are backwards. It needs to have negative voltage at the first cap. Would be worth removing the 7868 output tubes and confirming that when you rebuild it. Without negative grid supply those tubes will get very unhappy in a hurry.
