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Old 18th October 2011, 01:33 PM   #611
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Quote:
Originally Posted by Wwan View Post
Hi guys,

I look thru ebay and some stated 6n1p= to 9622. I have 2 6922 and plan to use it for a start. If using it is possible, should I do any changes on anything?

Thanks.
To use 6922, you will have to set the switch at 6N1P position. The 6N1P can only work at 150V and over. The 6922 however is much more flexible... They are pin compatible but I have not tried yet. I would buy some cheap 6922 (6DJ8, E88CC) just to make sure it all works... I have some E88CC tubes at home but they're running on my preamp... Also note the the filament section of the 6N1P is more current hungry then the 6922 (~600mA vs ~365mA)

Thanks
Do
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Old 18th October 2011, 04:22 PM   #612
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I have used some 6922 tubes (Siemens CCa's actually) in the Tube-I-Zator. They work fine. I love the flexability of the Tube-I-Zator.

Greg
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Old 20th October 2011, 11:16 AM   #613
DQ828 is offline DQ828  Australia
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Quote:
Originally Posted by pinnocchio View Post
To the general request... Drum roll...

People have been asking me about the wiring diagram of dual Buffalo II/III with dual Tube-I-Zator... So here it is!

https://picasaweb.google.com/lh/phot...eat=directlink

Hope this help!

Do
Why are the Ivy's involved I thought the Tube I zator was a stand alone output?stage?
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Old 20th October 2011, 12:06 PM   #614
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Quote:
Originally Posted by DQ828 View Post
Why are the Ivy's involved I thought the Tube I zator was a stand alone output?stage?
You can disregard them...

It was just the TPA hookup diagram that I re-used to make my life simpler...

Just the BII part and my arrows with text are important.

Ciao!
Do
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Old 27th October 2011, 06:14 PM   #615
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Hello,
I'm building the tube-i-Zator for my buffalo II DAC.
Now I have all welded components. A couple of questions:

- The regulator for the heater and the mosfets irf (shunt) must be isolated from the heatsink?

- What is the process for adjusting the SSHV and pcb tube-i-Zator before placing the valves?

Thanks for the help

AL
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Old 27th October 2011, 07:13 PM   #616
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Originally Posted by headrott View Post
I have used some 6922 tubes (Siemens CCa's actually) in the Tube-I-Zator. They work fine. I love the flexability of the Tube-I-Zator.

Greg
I just tried my Mullard E88CC (6922) with the switch set to 6N1P and I'm getting a really loud strident sound coming out of the speakers...

How did you get them to work on yours?

Did you get your resistors yet?

Ciao!
Do
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Old 27th October 2011, 07:46 PM   #617
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Quote:
Originally Posted by albertob View Post
Hello,
I'm building the tube-i-Zator for my buffalo II DAC.
Now I have all welded components. A couple of questions:

- The regulator for the heater and the mosfets irf (shunt) must be isolated from the heatsink?

- What is the process for adjusting the SSHV and pcb tube-i-Zator before placing the valves?

Thanks for the help

AL
For the SSHV you just have to omit the tubes for now, power it and probe the output (black probe to GND and red probe to Output) and turn the pot slowly until you reach about 150V. It will move over time as the mosfets get hotter. re-adjust the voltage after about 15 minutes. Make sure you read DC Volts.

For the heater, don't put in the tubes and power it. On your probe set to DC, black probe on star ground (middle hole on Tube-I-Zator PCB) and red probe on on 124R resistor near the regulator where you see the arrow with 6.3V. Turn the pot slowly until you reach 6.3V.

If all is ok, hookup the tubes and test!

Ciao!
Do
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Old 27th October 2011, 08:01 PM   #618
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thanks Pinocchio, seems easy.
Do the sinks have to isolate them from the irf?
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Old 27th October 2011, 08:07 PM   #619
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Quote:
Originally Posted by albertob View Post
thanks Pinocchio, seems easy.
Do the sinks have to isolate them from the irf?
I would isolate them since you can always short them with the case, srewdriver... I would not take a chance... It is not mandatory but highly recommended!

You know there's one of the 220uF/450V that you do not connect if using the Salas Shunt. There's a few pictures on this thread.

Tube-I-zator Professional PCB

There's some of my pictures in there to guide you.

Ciao!
Do

Last edited by pinnocchio; 27th October 2011 at 08:14 PM.
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Old 28th October 2011, 12:12 AM   #620
Wwan is offline Wwan  Malaysia
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Quote:
Originally Posted by pinnocchio View Post
I just tried my Mullard E88CC (6922) with the switch set to 6N1P and I'm getting a really loud strident sound coming out of the speakers...

How did you get them to work on yours?

Did you get your resistors yet?

Ciao!
Do


How is it going Do? Manage to settle it?
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