Tracking down a hum.

@imhififan  I have swapped out tubes, the condition still persists. I connected my headphone amp to the power (briefly) no hum coming through that I could hear. So I think it's in an output capacitor or in the tubes heaters. It isn't the tubes themselves. 
Thanks for the advice.

Post Script to all this.
I took the amp to a shop for repairs. The techs (2 of them both experienced) could not find an issue. Told me everything in the amp is "up to spec". Gave it back to me no charge. Get it home hook it up and the hum is still there. Only now it is constant. I call Rogue. They say try the dip switch in the voltage regulator. I found it and switched it from H to L and now everything is fine. Hum is gone amp runs nice and quiet. If it happens again. I'll send it off to Rogue.
Thanks again to everyone for your input.

Curious about this H/L switch in the regulator. The only one I can see, and the only one in the manual, is the phono board gain.

Mine is a line stage. Look for a small orange and white switch it's upright and small, near the transformer.
I was able to find it without too much trouble

Well after the weekend the noise is back. It's through the speakers and independent of the volume control. It goes back to Rogue this week with my contact information and a description of the problem.