Dmichel123
Well-known member
While searching for possible 6386 tube subs, I came across the 5899 remote cutoff pentode. The data/curves looked good to me, so I picked up a few and did some experimenting. I was able to tie two of them together and insert them directly in the 6386 socket of my Sta Level. I didn't take any measurements or do any scientific testing, but they seem to perform better in the circuit than the 5670 that the previous owner sold with it.
I ran the Sta Level for at least an hour, set for heavy gain reduction. I didn't notice any issues at all. The 5899s were pretty hot after that, may need a little air between them.
Anyway, I'm thinking of developing a socket adapter that would functionally work like a T-bar from Manley. I intend on doing more research/testing before designing and/or building the adapters. Any input would be greatly appreciated!!
I ran the Sta Level for at least an hour, set for heavy gain reduction. I didn't notice any issues at all. The 5899s were pretty hot after that, may need a little air between them.
Anyway, I'm thinking of developing a socket adapter that would functionally work like a T-bar from Manley. I intend on doing more research/testing before designing and/or building the adapters. Any input would be greatly appreciated!!