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In Reply to: RE: how low can you go.....?? posted by vinnie2 on January 01, 2017 at 08:27:21
A couple of things. Once you get to close to 0 in grid signal voltage, you run into A2 conditions. The tube must be designed for A2 and the driver must be able to put out serious watts. The operating conditions change with the voltage, the tube requires a different impedance from the OPT at different voltages.
Follow Ups:
So how close is too close? I don't think any of those things are in play right now or it wouldn't sound as good as it does.
From what I can tell your amp produces less than 1/10 of a watt before reaching grid current (A2).
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
And that means what exactly?
It means that if you play your amp louder than 1/10 of a watt the output tube does reach A2 (grid current) and the driver stage will have to deliver current to the grid and if it can't deliver the needed current the distortion will go up very quickly.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Well, all I can say is if it is indeed doing that it must be a good brand of distortion because the amp sounds great. And it sounds good with any type of music I play, jazz, blues, classical and pop, so I know it isn't a certain recording that is making it sound good. But then aren't SET amps famous for their good distortion anyway?
Edits: 01/01/17 01/01/17
If you have a decent enough sound card, just download arta or right art software it's free!
This way you can quantify what your hearing to basic Mesuring of FR and distortion and it's fun! And you will learn some things too.
Happy new year!
Lawrence
Unfortunately I can't get wifi in my shop. I would really like to have a computer out there for many reasons. But I would have to get a separate ground line for it. I guess I could take my old laptop out htere after I loaded it in the house though....... thanks.
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