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Post subject: Solid State rectifier VS Tube Rectifier
Posted: Thu Aug 14, 2008 8:35 am
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any thoughts?


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Posted: Thu Aug 14, 2008 8:37 am
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Only one...............Tube!


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Posted: Thu Aug 14, 2008 9:12 am
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yea thanks. i know that tube rectifiers are more desired and they sound better, but the point is i wanna know your opinions in the actual difference in sound.


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Posted: Thu Aug 14, 2008 9:14 am
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Sorry :oops: I can't help you there, maybe someone else can.


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Posted: Thu Aug 14, 2008 9:15 am
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yea thanks. i know that tube rectifiers are more desired and they sound better, but the point is i wanna know your opinions in the actual difference in sound.


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Posted: Thu Aug 14, 2008 9:20 am
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cool man its no biggy


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Posted: Thu Aug 14, 2008 9:44 am
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Personally, there are so many components to the signal chain...

...instrument quality, vintage, wood, pups, strings, cable, amp circuitry, tubes, speakers, room, weather...

...listener's ear level of discernment...

...player ability that day...

...'never have been able to really isolate the difference from solid or tube rectifier.


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Posted: Thu Aug 14, 2008 10:28 am
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Considering we're talking about full tube pre-amp and power amp section....

solid state rectifier: tighter tone, helps with fast, tight higher gain playing.

tube rectifier: more rectifier "sag", sounds great with classic rock, blues, etc

both great and slightly different.


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Posted: Thu Aug 14, 2008 10:44 am
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JSJH wrote:
Personally, there are so many components to the signal chain...

...instrument quality, vintage, wood, pups, strings, cable, amp circuitry, tubes, speakers, room, weather.


exactly. valve or solidstate rectification has very little to do with a amps sound. Sag is bought about more from capacitors across valves used in biasing. Look inside a ac30, it relies far more on capacitors, resistors and transformers than you'd think or vox would want you to know about.

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Posted: Thu Aug 14, 2008 2:21 pm
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nikininja wrote:
Sag is bought about more from capacitors across valves used in biasing. Look inside a ac30, it relies far more on capacitors, resistors and transformers than you'd think or vox would want you to know about.


Interesting. I was under the impression that sag was directly related to tube rectifiers. I've heard and "felt" that on some amps, and never thought or heard about what you stated. Good to know.....


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Posted: Thu Aug 14, 2008 5:07 pm
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To quote fellow forum member (and ace amp Guru) Billm, from the Fender Amps forum :

"Diode rectifiers typically supply more voltage than tube rectifiers and they produce far less heat. Some purists prefer amps with tube rectifiers because the lower voltage can induce "sag," or greater distortion when you play harder. "

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Posted: Thu Aug 14, 2008 5:18 pm
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"Sag" in your tube amp = good :)

"Sag" on your girlfriend's butt = not good :(


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Posted: Thu Aug 14, 2008 5:21 pm
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fhopkins wrote:
Only one...............Tube!


+1


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Posted: Thu Aug 14, 2008 7:08 pm
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On the vox ac30 all the high volume sag comes from the capacitors used to regulate power to the valves. The notion that they are purely class A amplifiers is a fallacy too. El84's only handle 12watts of output each in class A, but the amps move into class B territory to reach their 30watts. Theres a whole world of tricks and cons to 'valve sound' that mere mortals like us were never meant to know. All we can do is pick up seemigly useless titbits along the way.

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Posted: Thu Aug 14, 2008 7:23 pm
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Miami Mike wrote:
To quote fellow forum member (and ace amp Guru) Billm, from the Fender Amps forum :

"Diode rectifiers typically supply more voltage than tube rectifiers and they produce far less heat. Some purists prefer amps with tube rectifiers because the lower voltage can induce "sag," or greater distortion when you play harder. "
Some of the new Hybrid amps like the ones Vox sell have a low watt power amp circuit and a dummy speaker circuit that varies the impedance and this makes there circuit struture the same as a tube amp.

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