- Apr 3, 2022
- Reaction score
Very true!A power amp isn't that complicated a circuit, especially a tube one. You can get generic schematics from David Manley's book, I think it's called "The Vacuum Tube Logic Book" or something to that effect, if you can find a copy. If you wanted a soft start you could probably use the kit that Tubes4HiFi sells.
Personally, I wouldn't bother with the triode/pentode switch. When I tried the one on the M125's, ultralinear sounded way better than triode, and had more power to boot. I never thought about it again.
Although this is more or less alongside personal preference... UL operation has the edge over triodes, especially when it comes to greater control. UL op has more of everything that triodes offer.
I think that triode option was initiated during the SET era, such that SET always sounded sweeter, and there was more of that mid-band bloom. So quite a number of tube gear were offering triodes as an option. However, in most cases, once UL configs were more enhanced in circuitry and design, nearly every owner preferred UL op. There are those who are totally committed to SET Class A but for that kind of amplification the speakers must be highly efficient with high sensitivity ratings. Definitely not suited for stats. It may play tunes but not optimally.