looking for tube recommedations for Cary SLI-80

hi,

Thanks for your responses.

John, I am planning on replacing the rectifiers, I was thinking of NOS RCA or Sylvania 5U4GT's from the 40's or 50's, but I'll start looking at the 5AR4's also. What other rectifiers have you tried ? Do you have any opinion about the above named 5U4's ?

Cruz123 at the moment I too am using the EH KT88's , a real nice tube. I also want to get a quad of EL34's just to see how they sound in the triode mode.

Audiophelia the 6SN7's real short list is the Sylvania or Rayethon NOS tubes I've been reading about on vintage tube services web site and Upscale Audio.

The 6992 choice is coming to NOS Amperex or Telefunkin not sure which.

regards,

Larry

Larry, I would check the specks before subbing in 5AR4s as these are not a direct substitute for the 5U4s. In my experience with the SLI-80 I would stay away from 5U4GTBs (note the 'B'). These are the straight sided tubes with the higher rating, 275ma vs. 225ma. They made my amp too hard and bright. I also like the Syl. 6SN7GTAs from the 1950s. These are the box plate , not the angled plate versions. What will really make a difference is finding driver tubes with really well matched triode sections. I test mine on a VTV Dual Triode Tester. My favorite 6922s are the Amperex 'white label' PQs. If these are too bright you can try some 1960s Mullard 6DJ8s with the steel pins. They CAN sound wonderful; but are prone to noise and microphonics. If you use them you might have to buy and test a few to get a good pair. Good luck and have fun! JT

Larry:

Never tried 5AR4's in mine. From what I've read, 5U4G is better rectifier for this amp. Why do you want to switch to 5AR4's?

hi,

I decieded to use a used old stock RCA from the 40's as a rectifier after talking to Andy at vintage tube services. A pair which tested good cost 36 dollars.

Larry

hi,

Ahhh.. that's used old stock 5U4's.

Larry