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Re: Matsushita 7308 pinched waist

Hello Ironbut, Thanks for your response. I have an original CAT MK2 not an upgraded one. It is line stage only. I am using Amperex pinched waist in the line input positions and the cathode follower position. I use Sylvania 5751's triple mica black plate square getter in the 12AX7 positions. I also have the CAT JL2 in which I also use the same tubes and Siemens ECC82 chrome plate in the 12AU7 positions. I paid $36 for the single Matsushita 7308 pinched waist including shipping. It has not arrived yet. If you haven't read Joes Tube Lore yet you should check it out. I have a large collection of 12AX7's that I will probably end up selling becasue I was wary of trying the 5751's in the CAT gear. I feared damaging the
amp especially. Joe was correct about everything he auditioned but he didn't try some of the Siemens 12AU7 types that are to my ears better than the ones he tried. I disagree with him on the Amperex 7316 which he did try but didn't make his list of the best of the 12AU7's. It is better than all the others on his best of list.
Which amp are you using with your CAT Ult?

Bart


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