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In Reply to: RE: Good, Reliable, affordable 6922's? posted by Sibelius on August 02, 2021 at 08:53:03
Chris is not wrong in that they are all important. But in my experience some are more so than others. At least in amps I am familiar with and some of the other Sonic Frontier amps I've read about. I know it may be a moot point as you may be changing amps regardless.
It's a bugger though not being able to find any schematics or other information particular to the SF Power One. And typically when you have something like a v1, v2, v3... v6, v7, v8 set up per channel, you would think v1 and v6 would be critical. But that's not even the case with something like the Power Two. From what I have read it is the middle pairing.
Those Mullard's would sure be nice to try again. Some of the Ei tubes are also very good. Though in either case some can be very bad depending on the factory they were made in.
Fortunately there are some pretty good new production options at reasonable prices for both your signal and power tubes.
I'll be at the same stage as you are someday when I deplete by NOS supply on hand. Maybe even consider solid state as you are likewise doing in your other threads.
Jonesy
"I know just enough to get into trouble. But not enough to get out of it."
Follow Ups:
Middle pairing sounds familiar. It's been probably 20 years since I bought those Mullards from that guy. And, funny enough, when my older daughter wanted to learn to play the flute we went to the local music store to get her set up, and there he was! Turns out he wasn't just some guy who worked at the audio store, he's one of the most respected sax and ww players in the area and a well regarded music teacher.
I have to say that when I had to replace the GE 6550's, I really didn't notice much difference with the new production Tung Sols that I put in. Of course I no longer had anything to compare them to. I had the same experience with my 6sn7 based pre. I had NOS RCA's in there for a long time, but they went noisy so all I could afford were new production, and they sounded fine to me. Unfortunately there's also a pair of WE 417A's that this pre needs and those are now hard to find and lots of $$$. There are no new production replacements, so I'd either have to pony up $350/pr for WE's or try the other NOS ones available, which by most accounts are not nearly as good. Who knows if I'd be able to tell the difference though.
I'm going to give SS a try, I'm not really confident it'll give me what I like, but sometimes adjustments are required in life, so let the music play on.
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