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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Re: change output tubes, keep drivers ? posted by Oscillatus on August 15, 2002 at 20:41:29:
JD,Gotta agree with Osc... Driver tubes are just that, they drive the input signal to a level and impedance which is as close to optimum, for the power tubes to use (at least in theory).
Once, the "piazz" has gone out of the gain stage driver tubes, a lot of the gain is lost. The sparkle, quick response to transients, the good signal-to-noise ratio, and bass is gone, too. The system loses its dynamic quality.
Like water flowing downstream... If the headwaters are poor, the most spectular cliffs in the world can't rectify that problem & still give you a great waterfall. If the gain stages are weak or poorly designed; the power tubes can't rectify that and produce good overall tone.
If anything, I've seen tired power tubes make an "okay tone" provided the front end drivers are in excellent shape and the gain stage has components operating within a good designed operating range.
Ideally, you need: a good power supply, stable bias, good gain stage & phase inverter stage, PLUS healthy power tubes all working in harmony---to get the tone the designers of the unit were aiming for.
Remember this ditty? "You can't make Chicken Salad outta Chicken S*it."
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Follow Ups
- Re: change output tubes, keep drivers ? - steven oda 21:56:40 08/15/02 (3)
- Re: change output tubes, keep drivers ? - OLLY 22:05:43 08/15/02 (2)
- thanks all. ......Nt - J.D. 11:14:24 08/16/02 (1)
- result.......... - J.D. 20:29:42 08/17/02 (0)
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