2. amps-preamps
  3. 1326387515

12ax7 vs 5751

hi all,
i need some advice. i`m very new to tube amplifiers and i`ve been doing some tube rolling.

i currently have a pair of grant fidelity matched psvane 12ax7t`s in my amp which sound fantastic.

what i`d like to know is which are the better tubes, 12ax7`s or 5751 tubes. i`ve been looking at forums and there are folk out there that say 5751 tubes are better than 12ax7 tubes.

can i have your thoughts on this please and also which are the good 5751`s to go for.

i really like the psvanes but if they can be bettered i`d go for it as my next line up of replacement tubes.

my amp is a yaqin mc100b. the tubes i have installed at the moment are.....
2 x psvane 12ax7t`s
2 x brimar 6sn7gty/cv1988`s
2 x sylvania 6sn7gtb`s
4 x electro harmonix kt88eh`s

many thanks in advance guys.
grayf
mikirob
955 posts
 
PS, if your price is right I will pick up Agon fee. I don't quite know how to do that , but I wll find out provided either of you want to sell the Sylvania or GE.
frogman
7,437 posts
 
Mikirob, the comment about the GE's was the OP's, not mine (although I agree). I was quoting Grayf in order to explain my recommendation of the Raytheons which I think would be more to his liking. I do have a pair of GE's, but they are not for sale; sorry.
grayf OP
61 posts
 
thats fantastic advice guys. going to the bank tomorrow to see if i have enough funds to buy them. the treasure kt88 tubes are breaking in quite nicely. they sounded very upfront when i first fitted them in and they`ve smoothed right out now. they still only have 52 hours on them so they still have a fair way to go yet. and i had more fun this morning with all my neighbours out again! i listened to it quite loudly! amazing sounds!
grayf OP
61 posts
 
i must start by offering my apologies! i did say the psvane tubes are staying in for the duration of the burn in process. but somethings been niggling away at me. well the treasure tubes sound has really calmed down a lot to the point of being smooth, soooo, i thought i`d put the telefunkens back in! a very good move! as it is now, they offer a truck load of detail, but they don`t sound sharp, they sound very smooth. like the psvanes they have a beautiful warmth but these telefunkens add class. it`s very hard to describle. it`s like the sound has more life to it. they seem to have more texture and more realism. more true to life sound. pity the neighbours are in now! this is crying out for more volume!
mcpherson
174 posts
 
Grayf
Sell some tubes and move!!!!haha
I know this is a bit off topic but they had a Dave Gilmour concert on last night on HD Net. I wouldnt have known who it was except for this thread.
I am trying to pull some strings myself right now to get some tubes...without my wife having a heart attack.
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