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25th Anniversary Zen Triode Amplifier (Read 96735 times)
Archie
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Re: 25th Anniversary Zen Triode Amplifier
Reply #500 - 05/09/18 at 15:33:30
 
Jeff, have you read the posts of the ZMA owner in Vietnam?  I can never remember his exact name (something like Vyghong).  Stone might recall it.  He practically rebuilt his ZMA's insides.
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Re: 25th Anniversary Zen Triode Amplifier
Reply #501 - 05/10/18 at 03:22:13
 

For those reading along who might not know: With or without an attenuator, you will still need a 100K loading resistor to ground, it's essential. Also when the attenuator is all the way up, there is no resistor in the signal path, only the needed 100K resistor to ground, so turning the attenuator all the way up is the same thing as removing it.  You're only trading a gold contact against a solder joint which is really splitting hairs.
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Steve Deckert
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Re: 25th Anniversary Zen Triode Amplifier
Reply #502 - 05/10/18 at 03:54:42
 

Well, after a week of staring at the new Anniversary Zen Triode amplifier in a wide variety of base designs and woods, I have finally finished and will be taking photographs next. Here's a cell-phone shot before it goes upstairs for pictures.



Notice the Wood Guru Bob Zieglers touch on this one : )  This unique profile will be used on all anniversary amp(s) and will be able to be custom ordered in different exotic hardwoods.

See now if any one bitches about the price I'll just blame it all on Bob.   Smiley

Steve




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Jeff of Arabica
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Re: 25th Anniversary Zen Triode Amplifier
Reply #503 - 05/10/18 at 05:53:20
 
Quote:
For those reading along who might not know: With or without an attenuator, you will still need a 100K loading resistor to ground, it's essential.


Thanks for chiming in Steve.  I do remember you posting such in a thread a while back about still needing the 100k resistor, even if the attenuator is removed.  Good to know about the volume max emulating the absence of one.
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Jeff of Arabica
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Re: 25th Anniversary Zen Triode Amplifier
Reply #504 - 05/10/18 at 06:06:41
 
Quote:
Jeff, have you read the posts of the ZMA owner in Vietnam?  I can never remember his exact name (something like Vyghong).  Stone might recall it.  He practically rebuilt his ZMA's insides.


I do remember his journey Archie.   Most of what he replaced, with the exception of a few key capacitors, was rather superficial and he very much kept the innards of the ZMA intact.  He did add the Obbligato bypass power caps, which I did install, and later removed.  He also replaced the .022 uF signal caps and a few other 0.1 uF coupling caps with very nice (and very expensive Duelund caps).  Additional upgrades/mods included speaker binding posts, RCA input jacks, IEC connector, audiophile fuse and the removal of the attenuator.   With regard to the ZMA, he left the majority of capacitors, and all of the resistors original.
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Re: 25th Anniversary Zen Triode Amplifier
Reply #505 - 05/10/18 at 11:35:24
 
Wow, that's a beautiful amp Steve!
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stone_of_tone
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Re: 25th Anniversary Zen Triode Amplifier
Reply #506 - 05/10/18 at 14:52:36
 
Arch, yes, if you go to the ZMA Forum and read the Speed Thread, you will read our talk of Vyokyong's work.

Steve! Absolutely stunning/beautiful man!
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Re: 25th Anniversary Zen Triode Amplifier
Reply #507 - 05/10/18 at 14:56:51
 

Beautiful amp!  I do wish I had one in my stable of amps.  ;)

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Re: 25th Anniversary Zen Triode Amplifier
Reply #508 - 05/10/18 at 17:53:29
 
Lovely! In the home stretch. I can't wait to get my ears on one!
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Re: 25th Anniversary Zen Triode Amplifier
Reply #509 - 05/11/18 at 04:43:54
 
I started taking photos...  here are my three favorites from tonight starting with this one.  




-Steve
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Re: 25th Anniversary Zen Triode Amplifier
Reply #510 - 05/11/18 at 04:45:38
 






-Steve

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Re: 25th Anniversary Zen Triode Amplifier
Reply #511 - 05/11/18 at 04:46:06
 





-Steve

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Re: 25th Anniversary Zen Triode Amplifier
Reply #512 - 05/11/18 at 04:52:14
 

BTW, To pry the amp in the pictures out of the listening room so I could take some photos, I actually had to fire up the original prototype so I wouldn't melt.

Steve
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Tal
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Re: 25th Anniversary Zen Triode Amplifier
Reply #513 - 05/11/18 at 06:13:16
 
Stunning!
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Re: 25th Anniversary Zen Triode Amplifier
Reply #514 - 05/11/18 at 08:31:46
 
Steve Deckert wrote on 05/11/18 at 04:52:14:

BTW, To pry the amp in the pictures out of the listening room so I could take some photos, I actually had to fire up the original prototype so I wouldn't melt.

Steve

THAT I totally understand!
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alper_yilmaz
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Re: 25th Anniversary Zen Triode Amplifier
Reply #515 - 05/11/18 at 16:21:03
 
Looks great!  At the same time, I was kind of hoping to see a metal base to this amp, like lab gear back from 1950s!  Any such possible option, Steve?  Or, am I asking for too much?  :)

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Re: 25th Anniversary Zen Triode Amplifier
Reply #516 - 05/11/18 at 16:29:39
 
I bet a metal base would not sound as good as the wood. . . .
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Tripwr1964
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Re: 25th Anniversary Zen Triode Amplifier
Reply #517 - 05/11/18 at 17:57:42
 
is that a type 80 rectifier in that baby?
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Re: 25th Anniversary Zen Triode Amplifier
Reply #518 - 05/11/18 at 18:08:20
 
Yup.
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Showme
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Re: 25th Anniversary Zen Triode Amplifier
Reply #519 - 05/11/18 at 22:47:03
 
Is this amp going to be a regular offering or a limited/special edition?
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Re: 25th Anniversary Zen Triode Amplifier
Reply #520 - 05/12/18 at 00:38:01
 

The SE84UFO25 is planned to be a standard skew in our product line.

Steve

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Re: 25th Anniversary Zen Triode Amplifier
Reply #521 - 05/12/18 at 02:21:32
 
I see, blame it on Bob has made it all the way to Peoria....Sorry Steve, did I forget to mention that was the last piece of that wood left on earth?

My Bad!!!

It does look brilliant!
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Re: 25th Anniversary Zen Triode Amplifier
Reply #522 - 05/12/18 at 02:28:06
 
What! What? Bob, please elaborate. Last piece of what wood?
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Re: 25th Anniversary Zen Triode Amplifier
Reply #523 - 05/12/18 at 04:52:01
 
Hi Jeff...That wood!
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Re: 25th Anniversary Zen Triode Amplifier
Reply #524 - 05/12/18 at 06:59:11
 
Sounds crazy to say but.....  I want that wood!!!!!
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Re: 25th Anniversary Zen Triode Amplifier
Reply #525 - 05/12/18 at 07:11:59
 
Who has wood for that wood? Grin
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Re: 25th Anniversary Zen Triode Amplifier
Reply #526 - 05/12/18 at 08:37:57
 
Oh, I’ve got wood for that wood!
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Re: 25th Anniversary Zen Triode Amplifier
Reply #527 - 05/12/18 at 11:08:40
 
I am currently contracted to grow the tree that will be used as the wood for the 50th Anniversary amps.
It will be a stunning curly maple. I go outside every day and tickle the tree so that it will be even more curly.
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Re: 25th Anniversary Zen Triode Amplifier
Reply #528 - 05/12/18 at 13:41:22
 
I knew you "wood" come through Donnie!  
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Re: 25th Anniversary Zen Triode Amplifier
Reply #529 - 05/12/18 at 14:03:03
 
Looks good except I'm not a fan of the input or output rca jacks up in the front myself. Whatever sonics are achieved by having them right between the volume pots and next to hot tubes I'm sure most people will not be able to hear. Be nice to have them at the back and out of the way, less clutter and potential for issues imo and works better for most. Dave.
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Re: 25th Anniversary Zen Triode Amplifier
Reply #530 - 05/12/18 at 14:08:04
 
Donnie wrote on 05/12/18 at 11:08:40:
I am currently contracted to grow the tree that will be used as the wood for the 50th Anniversary amps.
It will be a stunning curly maple. I go outside every day and tickle the tree so that it will be even more curly.

LOL
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Re: 25th Anniversary Zen Triode Amplifier
Reply #531 - 05/12/18 at 19:50:43
 
Once in a lifetime chance to pick out the very hunk of wood that you want for your 50th anniversary bases right here!
Limited time offer, don't miss out!

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Re: 25th Anniversary Zen Triode Amplifier
Reply #532 - 05/13/18 at 07:49:51
 
Donnie,
Ill take dibs on the first left offshoot branch from the base trunk, 23.2456" start to 40.9013" end.  That should provide just the right amount of material to work with.  

Just to clarify, you can confirm this tree is purely Grass Fed, right?
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Re: 25th Anniversary Zen Triode Amplifier
Reply #533 - 05/13/18 at 12:45:05
 
antibiotic free too??  ;D
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Re: 25th Anniversary Zen Triode Amplifier
Reply #534 - 05/13/18 at 13:45:34
 
Totally free range.
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Re: 25th Anniversary Zen Triode Amplifier
Reply #535 - 05/13/18 at 18:11:31
 
What are the RCA jacks at the from of the amp?
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Re: 25th Anniversary Zen Triode Amplifier
Reply #536 - 05/13/18 at 18:28:32
 
They're the RCA jacks. Smiley They are the input from the source component.
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Re: 25th Anniversary Zen Triode Amplifier
Reply #537 - 05/13/18 at 22:48:08
 
As close to the input tubes as possible!
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Re: 25th Anniversary Zen Triode Amplifier
Reply #538 - 05/14/18 at 01:39:02
 

Just a reminder that this amplifier is a sonic celebration of what is possible with the Zen Triode design.  It was not designed to be popular, affordable, or ergonomic and was designed with no regard to sales. It is what separates the ultra serious from the norm. We have 3 versions of this amplifier that are affordable, and have rear mounted jacks for the exact reasons that have been pointed out.  SE84UFO, SE84UFO2, SE84UFO3.

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Re: 25th Anniversary Zen Triode Amplifier
Reply #539 - 05/14/18 at 01:44:28
 
A good reminder Steve. My 25th Anniversary SE84UFO3 Monoblocks certainly are SERIOUS. They make me think I'm a recording microphone. Worth the price!
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Re: 25th Anniversary Zen Triode Amplifier
Reply #540 - 05/14/18 at 01:50:05
 

Here is another picture showing the rear of the amp.



Steve



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Re: 25th Anniversary Zen Triode Amplifier
Reply #541 - 05/14/18 at 21:26:45
 
So would a switch box to allow more sources defeat the objective of this amp. I guess I would have a minimum of two sources.
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Re: 25th Anniversary Zen Triode Amplifier
Reply #542 - 05/14/18 at 21:56:15
 
Showme,
Absolutely not.  The fact of the matter is, you have multiple sources, like many of us.  No matter what amp you purchase, you will have to deal with a switch of some type,  whether it be internal or external.  I have a Decware ZSB in front of my Ultra and ZMA.  The way Steve designs these ZSB switches is minimalistic.  The goal, in a “World of No Constraints,” is obviously to reduce the number of connections and the lengths of runs.  But then reality crushes all of our hopes and dreams.  Most of us have multiple sources, and most of us need more than 6 inches of interconnects between components.  This 25th Anniversary still improves the conditions for the signal by taking away an otherwise additional lengthy run internally from the RCA inputs to the input tube sockets.  

As Steve mentioned in his last post, this is an amp of no compromises, regardless of how marginal of an improvement each design element offers.  If I am reading his mind correctly, he created an amp that when he goes to sleep at night (sometimes very late due to listening to this very amp) he can rest comfortably knowing that there was nothing more worth doing do it.  Once he hands us this amp, all we can do is attempt to feed it with nothing but greatness in source material, allied components, interconnects, proximity, room treatments, power and everything else.  But those elements have nothing to do with Steve or the design of this 25th Anniversary amplifier, and everything to do with us doing our part once the amp is in our hands.  
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Re: 25th Anniversary Zen Triode Amplifier
Reply #543 - 05/15/18 at 18:38:53
 
Well put Jeff. I guess I'm going to have to buy one of these.
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Re: 25th Anniversary Zen Triode Amplifier
Reply #544 - 05/16/18 at 00:45:54
 
I am a current Zen UFO owner and am looking forward to placing an order..  My rack has  about 3.5 inches of clearance space on top of the UFO rectifier tube and is open on the sides so I am a bit concerned about the heat.

With the extra tubes, will  this amp produce significantly more heat than the standard Zen amp?  
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Re: 25th Anniversary Zen Triode Amplifier
Reply #545 - 05/16/18 at 01:09:16
 
Ellsworth,  the 0D3 and 0A3 tubes don't get hot. So, with balance of tubes used the amp should run as warm as the UFO does.
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Ellsworth
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Re: 25th Anniversary Zen Triode Amplifier
Reply #546 - 05/16/18 at 02:07:44
 
Acetone,  thanks for the note.  That is good to know.
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Re: 25th Anniversary Zen Triode Amplifier
Reply #547 - 05/16/18 at 04:22:22
 

ANNIVERSARY AMP UPDATE:

As a follow-up to the post about the glass resistors, I have managed to find another version of it and purchased 100 sight-unseen. When I discovered these, I thought if they were readily available it might be worth making them standard in the amp and raising the price accordingly but at this point I think the best we can hope for is an option on the amplifier due to limited availability. So that is my plan, just to make them an option on the amp while supplies last.

The new batch I found are white glass instead of clear, but otherwise the same design and by the same manufacture. So far both types come individually packaged in a foil-lined sealed paper packet. I thought you would enjoy seeing what that looks like as well as the new resistors.  I will be comparing these with the previous ones and both against the standard ones I use to see what the discernible differences are. In the event that these sound like crap, (unlikely) I'll certainly let you know.









I'll put these in the original prototype and see what I hear... or is it hear what I see?

Steve


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Re: 25th Anniversary Zen Triode Amplifier
Reply #548 - 05/16/18 at 23:10:29
 
Hi Steve,
Is 9/66 on the packet a date? Are these from an old stock from the 1960s?

Brian
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Re: 25th Anniversary Zen Triode Amplifier
Reply #549 - 05/17/18 at 01:25:16
 

Yes, that's the date code!

Steve
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