I’m getting a hum in my integrated tube amp and it’s bugging me alot

Sorry for the delayed reply……I appreciate the responses. I have previously sent a video with sound to Rogers and he said he couldn’t hear it. He does stand behind his equipment, so I will give him another shot with a new video.

I really like the sound of my system and the amp really fires up the Magico’s quite nicely. 

Yes - I current have the amp plugged into my power conditioner. I have tried it plugged into the wall, but the sound quality is better into the conditioner and there is no appreciable difference in the hum.

I will keep y’all apprised of what happens as Roger has always been quite responsive to my queries.

Just spoke with Roger (of Roger's high fidelity). While he could not hear the hum in the new video that I sent, he did take my word for it and asked that I send the amp back to him for evaluation and repair. He asked that I wait until early December to ship, so it'll be a few weeks until I can report back to you. 

@ puptent  I will try to disconnect input and see what happens. Good suggestion.

Again - sorry for the delayed reply, am currently traveling.

I powered on the amp with just the speakers connected and the hum was still present. I will try to power on the amp with nothing connected; my best guess is that the hum will still be present.

The manufacturer previously suggested that the hum was due to tube degradation. I replaced two KT150 tubes that were looking like they’d had more wear than the other two, but the hum was the same. As stated in my original post, I replaced all 4 KT150 tubes with a matched set of 4 KT88 tubes that all had limited hours on them (under 100)……and the hum was still present (although perhaps slightly softer?)

When I spoke to the manufacturer to arrange for sending the amp back, he said the only cause he could think of was the transformer. 

I will be sending the amp back to the manufacturer in early December; stay tuned for an update in mid-December (hopefully, there will not be excessive shipping delays!).

OK, I finally have an update: the amp has visited the manufacturer (Roger of Roger’s High Fidelity). Roger said that my hum was due to 2 (of 4) bad KT150 tubes. He had no explanation for why my new matched set of KT88 tubes were producing hum (at perhaps a slightly lower volume). I’m planning to purchase 4 new KT150’s from The Tube Store unless somebody out there has a better recommendation for sourcing reliable and matched tubes. 

I will post again after I receive the amp back and have the new tubes installed. Thanks for everybody’s help and interest.