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Old 19th September 2011, 07:35 AM   #541
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Hello Pinocchio
I am studying the possibility of adding a tube-i-Zator my buffalo II. My setup is normal stereo.
Grateful to publish a circuit diagram and comment on how close the circuit, critical values ​​of the resistors, etc.. In short, watch a bit like what you have mounted. With their experience may provide the opportunity for novices like me to try a similar project.
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Old 19th September 2011, 11:04 AM   #542
DQ828 is offline DQ828  Australia
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Quote:
Originally Posted by pinnocchio View Post
Hi Studiostevus,

I have built a dual mono Buffalo II with Tube-I-Zator output and it sounds incredible. I have no such problems on harmonics as you are stating. This is most probably due to the Tube you use. On my side, I'm using the TJ Full Music 12AX7 and they sound extremely good. I'm getting a really wide and deep stage with lots of air. Bass is tight and deep. Imaging is excellent.

I also have dual Legato 3.1 SS output but for now I prefer the Tube-I-Zator.

One thing to keep in mind is the component choice you're using... I was using PRP resistors at the beginning for Rk and R I/V and although they sounded good, when I moved to TX-2575 it was a big WOW! Output caps are also extremely important... I'm using the Clarity Cap MR series which are really good but LONG to break... I was almost getting desperate here... The Mundorf Silver Gold Oil is preferred by many but the best is the Duelund Cast PIO but are impossible to buy by the common mortal!

I will post pictures of my setup at a later time.

Ciao!
Looking forward to the photo's
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Old 20th September 2011, 04:04 AM   #543
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Here's a few pics of the Dual Mono Buffalo II and Tube-I-Zator

The hookup is NOT final. It is still a "prototype" but sounds amazing already!

I'm currently using TX-2575 resistors (see near tubes) and R I/V is currently set to 56R. Russ from TwistedPear Audio suggested I try 28R - 32R which I will.

I will post hookup diagrams this week for people interested.

Ciao!
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Old 20th September 2011, 05:42 AM   #544
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Looks so sweet...

Very nice work !!! Keep going on
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Old 20th September 2011, 06:49 AM   #545
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Great!, Looks very good.
What valve is used?
Can you compare the sound with the legato?

Hoping these diagrams, thanks

Regards
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Old 20th September 2011, 06:55 AM   #546
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Originally Posted by albertob View Post
Great!, Looks very good.
What valve is used?
Can you compare the sound with the legato?

Hoping these diagrams, thanks

Regards
Quote:
I'm using the TJ Full Music 12AX7 and they sound extremely good
upss!
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Old 20th September 2011, 08:50 AM   #547
DQ828 is offline DQ828  Australia
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Quote:
Originally Posted by pinnocchio View Post
Here's a few pics of the Dual Mono Buffalo II and Tube-I-Zator

The hookup is NOT final. It is still a "prototype" but sounds amazing already!

I'm currently using TX-2575 resistors (see near tubes) and R I/V is currently set to 56R. Russ from TwistedPear Audio suggested I try 28R - 32R which I will.

I will post hookup diagrams this week for people interested.

Ciao!
Looks great, always interested in whatever you are prepared to share. My one will eventually be the cheaper stereo version, unless the obsession grows stronger from seeing your project
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Old 20th September 2011, 12:10 PM   #548
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Thanks to all for the nice comments!

I'm planning the following upgrades soon.

1 - Change the filtering Caps from 220uF 450V to 470uF 450V
2 - Change the Clarity Cap MR to Mundorf Silver Gold Oil

For those interested, I can sell the Clarity Cap MR for 180$ shipped for the four of them. They have about 100 hours in so they're fully "bloomed" . Never heard the Mundorf silver gold oil but at 115$ a piece I hope I will like them... I will give 4x 220uF 450V caps to the person buying this. Two of them are fully new and two have 100 hours. Those are the recommended caps in the BOM for the Tube-I-Zator.

I will keep you updated of any changes in the project!

Do
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Old 20th September 2011, 12:14 PM   #549
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Just a little change in the I/V resistors... It is supposed to be 21R - 32R

Sorry for the confusion!

Do
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Old 20th September 2011, 12:57 PM   #550
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if you have room i suggest you to use a CLC filter instead of crc, use a cheap hammond 9H 40mA between the two filtering caps, way better than a resistor and cheap, 10€ here in europe
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