Ok! So where do I begin, I was given this amp by a good friend who parted out several pieces of his equipment. Now first off this this is HEAVY!!!
I have a few questions, first off when I power the amp up I get a like a kind of a Bong noise from the transformers, is this normal. There is also a very low level hum from the trannies, you can also hear it through the speakers, I gets lower as I move the gain switch to low and louder as I move the gain switch to high. There is also a very little low level buzzing in the speakers, I realize that as I move my IC's away from the trannies it seems to get lower! Odd place to place the input jacks. what I did notice is that 3 of my 6922 tubes tested at 30 percent while one tested at 80 Percent. The tubes I would have to say are original due to the fact that they have RAM on them.
I am not new to tube amps as I have several, but this is my first Music Reference and I was wondering if this is normal with this type of unit. Also I take it there is no way to Bias each tube on individually. What is the best way to Bias this beast. I bias until the red light just begins to come on, is this on the low side?
Also I seems as though 4 tubs on one side were also replace due to the fact that 4 of the el34 has RAM on them and the other 4 don't. Any recommendations here, Plus I would love to use KT88 or KT66 tubes, is this possible?
Well I think I pretty much covered any concerns that I might have. Any help will be greatly appreciated.
Thanks in advance