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TORII JR official pictures & owner's manual! (Read 5601 times)
Steve Deckert
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TORII JR official pictures & owner's manual!
08/05/15 at 04:01:22
 
Here is a classic example of how a picture is worth a thousand words. †The topic is transparency.



This is the entire audio circuit for one channel. †While you can't see it, there are only 10 solder nodes in the signal path between the input and output jack Wink

-Steve
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« Last Edit: 11/11/15 at 00:44:03 by Steve Deckert »  
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Syd
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Re: New TORII JUNIOR amplifier for Summer!
Reply #1 - 08/05/15 at 09:34:10
 
I`m looking forwad to burning in as stock with the Tung-Sols which are liked by many. Then later on I have 6L6`s that run at nearly the same bias. I`ll have some extra power/grip V the Rachaels and can run without the CSP2+.  The new fidelety is something I`m keeping a lid on as I know it`ll be there but what shape/form it will be is like wondering what your getting for xmas.  :)
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Decware: Rachaels x 2 bridged, C. SP2+, ZP3, ZMC1, DSC i/c`s, DHC-1 pw/cbl`s Michell Orbe + SME V + M.Benz LP s , Nakamichi LX5, Lowther acoustas DX2`s, WE 16g sp/cbl`s, Isotek mains sub
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KMokc
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Re: New TORII JUNIOR amplifier for Summer!
Reply #2 - 08/08/15 at 03:24:36
 
As of today my Jr is on the test bench! YEAH!!!
Smiley

Kevin
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Sys 1:Rachel,Blumenstein Deluxe Orcas,Teac UD-501,Regen,MacBook Pro,Silnote RCA's,Rega RP6 GT Sub-plater,CW,Dynavector 20X2H,Nova II Sys2:Torii JR,CSP3&ZP3,Omega Super Alnico Monitors w/Skylan stands,Teac UD-501,Regen,Mac Mini,VPI Prime TT w/Ortofon Black,GH Cable
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Steve Deckert
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Re: New TORII JUNIOR amplifier for Summer!
Reply #3 - 08/08/15 at 05:11:13
 
You may or may not know this but you have serial 001, the first production TORII JR to go out the door.  Naturally I'm listening to it right now as I read the forum.  Using a worse case scenario - that being an amplifier with about 5 hours on it and pairing it with the one pair of speakers in the world that acts like kryptonite on a TORII.  Just enjoying how good it sounds despite my attempts to handicap it with a worse case scenario which btw completely failed.  

This is a technique I find useful because when an amplifier rises above the handicaps and sounds great when it clearly shouldn't, you can be far more certain it will sound incredible when it's taken more seriously.

I'll probably be ready to let this one go by Wed or Thursday.

Steve  :)

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KMokc
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Re: New TORII JUNIOR amplifier for Summer!
Reply #4 - 08/08/15 at 16:37:49
 
Yeah! Steve thats cool and as a side benefit I'm just closer to the 100 hours Break-In †
Smiley

I'm looking forward to hearing it but in the mean time I'm not suffering as I have both my Zen and Rachel to listen to.

Thanks for making such great products!

Kevin In OKC

Grin
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Sys 1:Rachel,Blumenstein Deluxe Orcas,Teac UD-501,Regen,MacBook Pro,Silnote RCA's,Rega RP6 GT Sub-plater,CW,Dynavector 20X2H,Nova II Sys2:Torii JR,CSP3&ZP3,Omega Super Alnico Monitors w/Skylan stands,Teac UD-501,Regen,Mac Mini,VPI Prime TT w/Ortofon Black,GH Cable
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Steve Deckert
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Re: New TORII JUNIOR OWNER'S MANUAL
Reply #5 - 08/17/15 at 01:10:11
 
OK, Great News! †I've taken the main photos of the amp and more importantly I have finished the owner's manual!

Your can read the owner's manual here:

http://www.decware.com/newsite/TORIIJRownersmanual.pdf

001 is in the shipping room now and I'm doing the QC on 002. †003 & 004 are in testing, 005 is on the bench... well you get the idea!



We should just call it the TORII UFO. †And yes I glued mine to table this time.

Anyway, I fully expect the 20 page owner's manual to answer all your questions.  Please read through it and post your comments or questions I missed or only partially answered here.

Now the only thing left is to make the web page Wink

Steve

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Steve Deckert
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Re: New TORII JUNIOR amplifier for Summer!
Reply #6 - 08/17/15 at 01:17:24
 
For those who want to create some wallpaper, here is a link to the untouched full res images as I shot it.

http://www.decware.com/newsite/images/TORIIJR.jpg

Enjoy Smiley
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Brian
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Re: New TORII JUNIOR amplifier shipping now!
Reply #7 - 08/19/15 at 01:45:41
 
Steve said:
"We should just call it the TORII UFO."

I like "TORII UFO" better than TORII Jr.

Brian
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Re: New TORII JUNIOR amplifier shipping now!
Reply #8 - 08/19/15 at 03:13:16
 
+1
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Re: New TORII JUNIOR amplifier shipping now!
Reply #9 - 08/22/15 at 03:16:23
 
I downloaded and read ( and enjoyed! ) every word in the owner's manual.

What is interesting is the (really) fixed bias approach to using only EL34 tubes.

I wonder if it would be possible to implement a toggle switch to handle different output tubes?

I'm sure Steve has valid reasons for his choice of output tubes in his amp design.
But a chronic tube roller like myself just can't help wondering what if......

For my Torii MK4, in my set up, I do prefer EL34s over KT66s.

Cheers !

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Re: New TORII JUNIOR amplifier shipping now!
Reply #10 - 08/22/15 at 12:05:54
 
I recently switched back to el34's in the tori III and have been enjoying them.  Hazen grid effect?   I don't know, but what I might give up in weight I pick up in transparency.   I'll switch back at some point to see but I am enjoying them for now.

Looking forward to hearing jr at the festivus.
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BillO
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Re: New TORII JUNIOR amplifier shipping now!
Reply #11 - 08/22/15 at 18:48:37
 
I expect my Torii Jr. to be shipped within the week so I, too, have studied the manual. I fired an email off to Steve to ask some questions about the impedance switch which I didn't see covered. If you are curious, the rear position is HI and the forward position is LO. The switch is meant to be used "on the fly" so you can judge the best setting for your speakers.
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Re: New TORII JUNIOR amplifier shipping now!
Reply #12 - 08/23/15 at 02:42:12
 
I found information of the impedance switch first on page 6, and then in  more detail on page 12.
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BillO
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Re: New TORII JUNIOR amplifier shipping now!
Reply #13 - 08/23/15 at 19:37:34
 
So did I but it doesn't address the question of which position is HI vs LO. A minor point no doubt since your ears will determine the "best" setting but it is still nice to know.
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Steve Deckert
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Re: New TORII JUNIOR amplifier shipping now!
Reply #14 - 08/25/15 at 04:29:44
 
Hi Bill,

It's in the owner's manual on the picture that shows what everything is.  But to answer the question, towards the back is 8 ohms and towards the front is 4.  Sadly, now that you know it will forever change what you hear.


Steve
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Steve Deckert
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Re: New TORII JUNIOR amplifier shipping now!
Reply #15 - 08/25/15 at 05:13:46
 
LAST MINUTE CHANGE OF HEART...

So far only 001 has shipped out, I pulled 002 from the shipping room. †

During my listening tests when I tried all the possible output tubes (EL34, 6L6, KT77, KT66, 7027) I found the EL34 to be the best sound and the most power of all of them in this amplifier. †

Part of the reason for this is because when biased at 40 mA the high voltage in the amplifier is at the perfect point of 333 volts feeding the UFO output transformers, and the OA3 which feeds the input stage. †Anything lower than this amount will drop power. †So even though a KT66 may have more power than an EL34 in some amplifiers, in this amplifier it is the other way around. †

The reason for this is because biasing at 50mA drops the high voltage by several volts which changes the power output of the amplifier.

Well sadly the range of tube specs ( in today's current production, with Tungsol, Mullard, EH, JJ, Genolex, and all the Chinese offerings not to mention NOS tubes of yesteryear) is too great to make the bias non-adjustable like I had hoped.

For example, an EL34 that measures 22 mA at 400VDC on the tester would bias up at the target of 40mA just perfect. However, an EL34 that measures 30 mA at 400VDC on the tester would bias up at 50 to 55 mA. † This is why I was very clear in the owner's manual not to use different tubes, like 6L6's or KT66's because they will bias 10 to 20 mA higher!

Since the range of tube specs within EL34's can make the amp bias anywhere between 35 an 60 mA combined with the fact that you know someone will put a different tube in the amp regardless of what the owner's manual says...  I have decided to make the bias easy for the TORII JR owner's to adjust at home.



Here's is how you do it: †

To bias the amp for a new quad of output tubes (must be done every time you install new or different tubes) simply remove the two input tubes and turn the amplifier on.

You will see a center hole in each of the 9 pin tube sockets. †These holes are for your volt meter leads. †The left one is ground (black lead) and the right one is DC voltage (red lead). †Stick your meter probes in these two holes and adjust the bias pot located just in front of the on/off switch. †Let the tubes warm up for several minutes and then adjust the bias pot until the voltage on the meter reads 0.825 Volts DC. †This equals 40 mA. †1.023 volts equals 50mA and is too high. † 0.606 volts equals 30mA and is too low.

Amp #001, you have my apologies as your amp is non adjustable. Your upgrade is of course on the house including shipping should you decide to add the mod.

Steve
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« Last Edit: 08/25/15 at 05:20:04 by Steve Deckert »  
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Steve Deckert
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Re: New TORII JUNIOR amplifier shipping now!
Reply #16 - 08/25/15 at 05:16:43
 
I'll be updating the manual to reflect this soon. Smiley
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Re: New TORII JUNIOR amplifier shipping now!
Reply #17 - 08/25/15 at 16:53:17
 
"It's in the owner's manual on the picture that shows what everything is. †But to answer the question, towards the back is 8 ohms and towards the front is 4. †Sadly, now that you know it will forever change what you hear."

Oops. Hadn't thought of that. I believe a botched Vulcan Mind Meld will cause partial amnesia but its risky and hard to arrange. Maybe I'll have someone (like my long-suffering wife) flip the switches back and forth a bunch and leave them in a random position for a blind comparison.
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Steve Deckert
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Re: New TORII JUNIOR amplifier shipping now!
Reply #18 - 09/01/15 at 23:40:32
 
The owner's manual has been re-written and available at the original link:


http://www.decware.com/newsite/TORIIJRownersmanual.pdf


A great amp just got better!  Our wood bases for these amps in in route to us now so there will be many JR's shipping out later this week or early next week.

Steve
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Re: New TORII JUNIOR amplifier shipping now!
Reply #19 - 09/01/15 at 23:47:39
 
Hi Steve, just curious ...

1. Does the Torii Jr. produce the even order harmonic distortion similar to the bigger Torii? †

And

2. By now having the bias adjustable ~ we are now able to try other tube compliments such as KT66 (as long as we do the bias adjustment with a multi-meter) and without having to send the unit back to the Decware factory ... am I correct about this?

Thanks.
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« Last Edit: 09/02/15 at 00:03:59 by beowulf »  
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Lin
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Re: New TORII JUNIOR amplifier shipping now!
Reply #20 - 09/02/15 at 00:31:55
 
Question 2. Answer Yes

From the Manual:
Alternate quads of output tubes that could be used in this amplifier IF and ONLY IF the amplifier is re-biased for that specific quad are: †6L6ís, 5881ís, KT77ís, 7027ís, KT66ís, EL34ís, 6CA7ís.
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Re: New TORII JUNIOR amplifier shipping now!
Reply #21 - 09/02/15 at 00:57:27
 
Lin wrote on 09/02/15 at 00:31:55:
Question 2. Answer Yes

From the Manual:
Alternate quads of output tubes that could be used in this amplifier IF and ONLY IF the amplifier is re-biased for that specific quad are: †6L6ís, 5881ís, KT77ís, 7027ís, KT66ís, EL34ís, 6CA7ís.


Thanks Lin, I just re-read the new manual reflecting that! Smiley
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Steve Deckert
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Re: New TORII JUNIOR amplifier shipping now!
Reply #22 - 09/02/15 at 02:00:12
 

Quote:
1. Does the Torii Jr. produce the even order harmonic distortion similar to the bigger Torii?  
And
2. By now having the bias adjustable ~ we are now able to try other tube compliments such as KT66 (as long as we do the bias adjustment with a multi-meter) and without having to send the unit back to the Decware factory ... am I correct about this?




Hi Beowulf,

1) Yes, the circuit in the two amplifiers is the same, except that the output transformers being ultra-linear negate the need for a treble or bass control or reconstructive feedback.  The direct coupled phase inverter design used in both models is what creates the harmonics.

2) Yes, that is correct.  ;)


Steve
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Re: New TORII JUNIOR amplifier shipping now!
Reply #23 - 09/10/15 at 22:36:18
 
Hi, even though I haven't decided which Zen amp I'm going to buy until I come to ZenFest, how are you guys even seeing the shopping cart for the Torii Jr -- I don't see the webpage for it.  --thanks
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Torii Mk IV [beeswax, attenuator]
Chnl. A:
Thorens 150 [SME M2-9, Dynavector 17D3, Origin Live (DC200 motor, Ultra Transformer & Controller)] => Sutherland 20/20 phono stage [dual mono]
Chnl. B:
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=> Klipsch KG4's [Crites' upgrades
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Re: New TORII JUNIOR amplifier shipping now!
Reply #24 - 09/10/15 at 23:03:16
 
Welcome Jimmy!

I believe that the manual is found on the thread about the amp, but I don't see a page for the amp either. My guess is that those who have ordered have called Decware to do so. . . brave, adventurous souls who trust a Decware amp will be amazing!
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Re: New TORII JUNIOR amplifier shipping now!
Reply #25 - 09/11/15 at 00:01:43
 
Steve sent out a notice with a purchase link in mid July. It went to everyone "on the list" (regular repeat customers maybe?). That's how I †bought mine. It ships tomorrow.
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Re: New TORII JUNIOR amplifier shipping now!
Reply #26 - 09/11/15 at 00:17:47
 
Ok - thanks. That would explain it. Hope to meet some of you at zenfest - I'll be there all day Friday but fly back Saturday morning.  Cheers!
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Torii Mk IV [beeswax, attenuator]
Chnl. A:
Thorens 150 [SME M2-9, Dynavector 17D3, Origin Live (DC200 motor, Ultra Transformer & Controller)] => Sutherland 20/20 phono stage [dual mono]
Chnl. B:
Zen CD/Network Player ZCD240
=> Klipsch KG4's [Crites' upgrades
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