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In Reply to: RE: BTW posted by smart845 on March 30, 2014 at 23:51:34
I like this.
Be careful with 95db. Anything longer than 4 hours and you will permanently damage your ears. (some experts say 1 hour)
BTW, I agree. With your speakers a 45 is more than enough power. But I'll never understand why you don't operate the driver tube in a linear spot and/or use a driver tube that has the output impedance that's needed to drive the Miller fully.
Your speakers are so sensitive that you could use a 6sn7 or a 5687. You don't need that high gain driver stage. Try it.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Follow Ups:
Hi Tre,
Planning on another amp later in the year with more compact chassis and using all I've learnt so far. Maybe this is the chance to give a 6ns7 a try and push the op point higher for the 45.
Out of interest I was told by a respected transformer designer to run the 45 filaments at 3v. Sounds like tube suicide to me, opposite of starved filaments.
I do have to say though that lower gain 12ax7 do not have that amazing jump factor that I get from a Golden Lion 12ax7. The Psavane are nice but less gain and without that special dynamic freedom.
Cheers
Smart845
That's really interesting. Especially a 45 with 3vac on the filament. I would think it would just kill the tube?
It seems, these days, everyone wants to re-invent the wheel.
I will say that the "amazing jump factor" you speak of almost has to be some weird adoration. Gain is gain and if you have enough, you have enough.
But who am I to tell you what to listen to?
In my system I don't even have enough gain to clip my output tube but I have enough to play my system at the levels I want.
Take care,
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Can't seem to get the video to imbed...The CD of this performance is one of my reference tracks. Listen to the brushes on the snare. This is a beautifully recorded album.
https://www.youtube.com/watch?v=it1NaXrIN9I
Edits: 03/31/14
Very nice recording.
You have to use the old codes.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
No embeds on the ipad but got the you tube.
The DK track is wonderful and again I get that reality of the live concert as though sat at her feet hearing all the clacks and coughs from the audience.
Cheers
Here's a nice, somewhat dry recording that puts Mark's vocal right in the room with you.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
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