And despite something simple like this you got your panties all twisted in a knot.
Anyone beyond a novice level of experience troubleshooting tube gear knows the first thing you do is test each tube to make sure it's functioning properly.
Also, if you have any sense and your product is under warranty, you contact the manufacturer first before opening the thing up and start changing parts in and out to make sure it won't void the warranty.
I didn't get my panties twisted in a knot at all. I was frustrated and offended that the warranty for my entire amp was revoked by the US manufacturer, over something that is so simple and so commonly performed, that it really did feel like they just didn't want to support me because I was in the UK and I was more hassle than I was worth to them.
And for your information the reason I didn't check the rectifier tube is because Fryette told me it couldn't possibly be that, and to replace my preamp tubes. Which I started to do.
The symptoms were - high amounts of distortion on the clean channel, a lot of noise on the clean channel, with the gain channels seeming to be unaffected.
At the same time there was a large and popular thread on the Fryette users forum about the Sig:X clean channel being noisy, and what people could do about it. In that thread, various users were saying you can use a 12AY7 tube in V1 position in order to reduce the gain and therefore the noise throughout the amp. Some users reported success, and some reported no difference. Dave was posting in that very thread too, and not once did he warn anyone about warranty restrictions.
You would think that the
official support guy posting on the
official users forum, in a thread where people were recommending different preamp tubes.... you would think he would say something, no??? Or are you THAT blinded by your fandom of the company and their products??
Anyway, once I took it to my local tech, he switched out the power tubes one by one. No difference. Then he switched out the rectifer tube. All the symptoms went away. Unfortunately this happened
after Fryette went Nagasaki on my warranty - again, for doing something very simple, very commonly performed, and for a maximum of 2minutes.
You don't know the story, you don't know the intracacies of the situation, and you don't know the history. So don't presume to cast aspersions from your comfy armchair. Cheers.