ELP Tube Preamp suggestions (Dodd vs. Dared)
Comments
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Some vintage tubes 'flash' on startup. I had never seen it until just the other day. Apparently, nothing to worry about.Check your lips at the door woman. Shake your hips like battleships. Yeah, all the white girls trip when I sing at Sunday service.
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malikarshad wrote:What's the function of Recitifier tube in preamp?
Does changing it to a better one will affect the SQ?
A rectifier utilized in the power supply of a preamp is solely to convert AC into DC - hence the name "rectifier."
The signal never actually passes through this part of the circuit, so one would think that a rectifier tube has no direct effect on the SQ well, that's the theory. The truth however is a little bit different. The rectifier tube has a direct bearing on the power supplied for the other tubes and, due to its relative inefficiency (compared to a solid-state rectifier), it can and will sag when the demand for power is higher than it can handle. This is a relatively rare case scenario in audio gear unless overdriven.
However, in guitar amps, a lot of players (me included) like the sound and feel that results from this "sag." -
malikarshad wrote:One question when I turn ON the preamp THERE IS GLOW OF LIGHT(FIRE) IN THE PREAMP TUBES (12AT7) FOR A SECOND. Is this normal?
-fredv- -
fredv wrote:Yup, my Mallard 12DW7 does the same thing - flash at power on, quite a scene
Does it quack also???
HTRookie's Mullards have a flash at start up also. They are the only tubes I've ever seen that do that. Kinda cool to be honest :cool: ."SOME PEOPLE CALL ME MAURICE,
CAUSE I SPEAK OF THE POMPITIOUS OF LOVE" -
BlueMDPicker wrote:A rectifier utilized in the power supply of a preamp is solely to convert AC into DC - hence the name "rectifier."
The signal never actually passes through this part of the circuit, so one would think that a rectifier tube has no direct effect on the SQ well, that's the theory. The truth however is a little bit different. The rectifier tube has a direct bearing on the power supplied for the other tubes and, due to its relative inefficiency (compared to a solid-state rectifier), it can and will sag when the demand for power is higher than it can handle. This is a relatively rare case scenario in audio gear unless overdriven.
However, in guitar amps, a lot of players (me included) like the sound and feel that results from this "sag."
Hey Mike,
Have you compared the Sovtek and Mullard GZ34 in you guitar amp? If so, what was your result. I can live with Sovtek but the Mullard sounds so much better. Better bass, bloom, etc.