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The MYSTERY AMP ! (Read 146096 times)
Donnie
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Re: The Mystery Amp
Reply #30 - 04/12/13 at 00:13:28
 
Tube cell phone.
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Owner of the infamous RED TORII
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beowulf
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Re: The Mystery Amp
Reply #31 - 04/12/13 at 00:33:49
 
Quote:
Donnie,
More predictions: Wired with wire that has been treated with the tears of a clown: The bases will be made from wood taken from the Vatican's rec room: The knobs will be made from a TiCabon composit made by NASA: 8 speed switches!?: The tubes all will be heat treated, tempered, Cryoed,and then re-heat treated and tempered again: It will be only offered with a red top plate!
I may have gleaned a bit more from the photo's than the rest of you.


I'm with Donnie on this one, I mean it's so obvious from the pictures isn't it?  I just hope Steve is feeding the clowns locked up in his storage room! Grin
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Donnie
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Re: The Mystery Amp
Reply #32 - 04/14/13 at 00:32:23
 
The process begins....

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marky
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Re: The Mystery Amp
Reply #33 - 04/15/13 at 22:58:22
 
50-1......300B
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Steve Deckert
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If the 1st watt
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Re: The Mystery Amp
Reply #34 - 04/16/13 at 00:04:19
 


Got a few more moments with the mystery amp today...  this is an interesting point in the build of this (or any) amplifier.  For those of you who aren't amp builders, you might not realize that everything you see completed in the photo is just the power supply, chassis and hardware.  The actual amplifier circuit or parts are not yet there.  In fact I could use this to build several different kinds of amplifiers, or at least, several different variations of this one.

The process is the same on every amplifier...

1) Install the hardware onto the chassis
2) Establish your ground path.  In this case - a single straight 10AWG piece of copper about 10 inches long located in the exact center of the amplifier and terminated to the earth ground lug on the IEC connector also located in the exact center of the amplifier.  This sets the stage for a mirror image layout where all wires are equal length from side to side throughout the entire amp.
3) Wire up the transformers to get all those long leads out of the way
4) Install the main power supply caps

Then stand back and begin to plan your next move as I am now.


Some insight into this power supply which as you know came from the development of the Zen TORII Mono's.  It is unique and Zen like in it's simplicity - part of the appeal to me, but it's the performance that really matters.  My wanting to continue exploring it is the motivation for this amplifier.

What makes this different are all the things that are missing.  Typically you have a tube rectifier converting the AC into ragged DC which is smoothed with a capacitor.  That makes it somewhat less ragged, but it takes more.  Either a choke or a large high wattage resistor is needed followed by another capacitor is what it takes to complete the smoothing process enough to work with.  Of course these steps are repeated further down stream to continue reducing the AC ripple to a point where it's nearly gone - the same as battery power.  So the high wattage resistor and additional capacitor are repeated a minimum of once for each additional stage in the amplifier, usually twice.

The result of adding the chokes or high wattage resistors is limited current and reduced voltage.  Any amplifier designer will tell you that where good power supplies are concerned you always want as much current as you can get.  And if you're new to tube electronics, the picture above will have more to do with the sound of the amp than the actual parts used to create the amplifier circuit itself.  The quality of DC power being delivered by the supply determines the quality of the amplifier and the resulting fidelity.  So you can imagine how a preamp stage being 3 to 4 resistors and or chokes away from the power source will greatly rob current flow.  This hampers dynamics.  There is also a delay in time for the current to pass through these filters which can have profound effects on the transparency of your amplifier.

By replacing the current limiting tube rectifier with high current fast recovery diodes we eliminate the current limiting, the voltage sag, and of course a massive amount of heat.  Normally tube rectifiers sound better but that is in the context of using 10 to 100 microfarad capacitors.  When you use a 2000 microfarad capacitor that's the size of a milk bottle the game changes and the tube rectifier becomes the clear looser in this contest.

Using such a large cap stores so much energy that it becomes a black hole for all AC ripple and noise on the line.  It eliminates the need for a choke or a large high wattage resistor with additional capacitors.  That give us zero current limiting and zero voltage loss and zero heat.  It's a win, win, win.

Of course to feed the preamp stage (smaller tubes) we need to drop the voltage and the common way to do that is a high wattage resistor followed by a small capacitor.  That is how the Torii Mono's were done.  In this amp, I am replacing this resistor with a vacuum diode aka voltage regulation tube (OA3) which will give me the same voltage drop as the resistor but with 20 times the ripple reduction and 100% decoupling so that harmonics from dirty power grids in your city do not contaminate the pure DC power feeding your critical preamp stage.  This also means that again 100% of the heat has been eliminated.

This will be the first power supply I've ever done that has zero resistors and zero chokes.  It's so Zen it's scary.




Steve  ;)
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« Last Edit: 04/16/13 at 00:56:48 by Steve Deckert »  
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Steve Deckert
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Re: The Mystery Amp
Reply #35 - 04/16/13 at 00:13:09
 
300B odds are higher than that I'm afraid.  Actually you don't know now many times I've been tempted but the temptation was purely sales.  The truth is, my original testing back in the 1990's during the development of the Zen Triode amplifier showed me I can get better sound with more neutrality from other tubes that just happen to cost a fraction of the price.  And unlike 2A3 and 300B amps you won't have to wonder how much better your amp would sound if you could afford the really good tubes at $1000 a pair.  

I am asked repeatably to build a 2A3 or 300B amplifier, but unless I find a way to make one justify the cost of the tubes AND sound better, I'm just not interested.  Plus you can buy a lot of nice used 300B amps now days that have been discarded by Decware customers. Wink

-Steve
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Donnie
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Why does it hurt
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Re: The Mystery Amp
Reply #36 - 04/16/13 at 01:51:36
 
What, no clown tears? Are you crazy?
So I've been rounding up clowns for the last few days for nothing?
I've spent over $59.24 in cotton candy alone. That is what I get for speculating in the clown tears market. Nothing but heartbreak and squeeky noses to show for it.
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Steve Deckert
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Re: The Mystery Amp
Reply #37 - 04/16/13 at 03:13:48
 
Are you sure it's not clown ears instead of tears?
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Pale Rider
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Re: The Mystery Amp
Reply #38 - 04/16/13 at 13:22:20
 
Steve explained:
Quote:
Using such a large cap stores so much energy that it becomes a black hole for all AC ripple and noise on the line.  It eliminates the need for a choke or a large high wattage resistor with additional capacitors.  That give us zero current limiting and zero voltage loss and zero heat.  It's a win, win, win.

I thought thsi was a very interesting discussion, especially since I just received in my email one of Paul McGowan's posts about power supplies, in which, during the course of noting how a switching power supply could be designed to achieve some of the same objectives, he noted this:
Quote:
In the past the best sounding option was to go with a linear supply – making sure it was over built for the task.  The problem with these supplies is that they are neither clean nor pretty – and the best results with any form of amplifier come when you have a pretty, clean and DC-like output on your power supply.  Even your classic A or A/B amps benefit greatly from a better supply – and a few traditional amp manufacturers even go so far as to regulate their amp’s power supply.  But the vast majority of amps do not regulate nor do they do anything about the ripple, jaggies and noise associated with this supply type.

These are two radically different approaches to achieving similar results. McGowan is right: the vast majority of amp designers do little or nothing about this problem. We happen to be fortunate that Steve is part of the small minority, and is extremely focused about creating clean power for his amps; and yes, his approach is very Zen. I especially love that elegance.
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4krow
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IMAGINE WHIRLLED
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Re: The Mystery Amp
Reply #39 - 04/24/13 at 04:02:15
 
No No I think it's a welder, not an amp.
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Steve Deckert
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Re: The Mystery Amp
Reply #40 - 04/24/13 at 05:10:35
 


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Lord Soth
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Re: The Mystery Amp
Reply #41 - 04/24/13 at 09:29:06
 

This looks like a cross between a Zen Torii Mk3 and the Zen Mono-blocks.

It looks like a really serious (in terms of power o/p)  amp with the transformer/s setup so my guess is that this is like a MINI version of the Zen mono blocks but with VR.
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deucekazoo
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Re: The Mystery Amp
Reply #42 - 04/24/13 at 13:51:44
 
I think it actually looks like a cross between the Taboo and the Torii monos. It looks like the holes on the back, left and right, look like headphone holes for the XLR plugs and a normal phono jacks.
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ncblue
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Re: The Mystery Amp
Reply #43 - 04/24/13 at 15:35:47
 
Or balanced output connections
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stone_of_tone
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Re: The MYSTERY AMP !
Reply #44 - 05/01/13 at 15:17:08
 
....might be Balanced (XLR) INputs (Line Level RCA IN too of course)... .

I know I want one.  

SuperZen CKC, SE84CS (Stock), Mystery Amplifier & the new Taboo Amp/Headphone Amplifier.....will be the only Amps I need to Own for Reference Two Channel MUSIC.

I bet the new Mystery Amplifier, equals or EXCEEDS the new Audio Research REF75 ($9000.00) at half the price and roughly, half the watts.    -Stone
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« Last Edit: 05/01/13 at 23:33:53 by stone_of_tone »  

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