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Substitute 5V4G tube for 5AR4 tube

I have mostly PrimaLuna equipment, I.E. Prologue 3, 5, and 8
The diode tubes in the Prologue 3 and 8 are 5AR4 tubes (Chinese). I would like to know what sonic changes others may have found by substituting either 5V4G or 5Y3 in place of the 5AR4 diode tube. The 5V4G tubes I am considering are NOS RCA's. All signal tubes, 12AU7 and 12AX7 are Tungsram.
I have rotated RCA cleartops and BB's and still go back to the Tungsgram tubes, although I recently aquired some 12AU7 Slyvaina Gold Brand triple mica, extra rod, that I am experimenting with. I need more time to see which unit they may sound best in, but I did get as far as pluging them into the cd player and noticed right away a focused, stronger base.
bradf

Showing 1 response by jedinite24

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jedinite24
1,503 posts
 
Hi BradF

As time has gone by what are your thoughts on the 6680 tubes in your gear? What brand 6680 tubes did you find and use with your PrimaLuna equipment? Has anyone else used 6680 tubes and care to share their thoughts. I was searching the archives for information regarding 6680 tubes and found this old thread. I normally like JAN 6189 or 5184 tubes but found a pair of white labeled vintage Tung Sol 6680 grey plate tubes. I'm wondering if they are any good.

Thanks and advise when you can.
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