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Old 23rd April 2010, 04:20 PM   #121
toufu is offline toufu  United States
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Quote:
Originally Posted by flocchini View Post
The pix of the 6SN7 is in post 102 (this thread).

I have a bunch of 6SN7 tubes so it was a logical choice. It does use the V+ and V- outs of the Buffalo and gives an SE output. I used Oliver's board for the power supplies and the ground plane and as a base for the Amphenol 8 pin tube "test bench". Hard-wired the circuit to that.

I recently replaced the PIO output caps with Mundorf Silver/Oil and a .1μF Russian Teflon. I think this gave the sound more body and punch.

Best

Bob

Thanks Bob, what's the value of the Mundorf you used? And I am assuming you parralle the two caps, right?
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Old 23rd April 2010, 06:45 PM   #122
torsken is offline torsken  Norway
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Ok. I'm up and running. So far I'm very satisfied.

This is what I have put together:

Analog Device AD1865 DAC End 2
Texas Components TX2575 I/V resistors
6N2P-EV (Russian: 6Н2П-ЕВ) tubes
Mundorf silver/gold - 2,2F output capacitors

I noticed the regulator gets hot. Is this how it should be?

Also do this output stage switch the phase of the signal?
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Old 23rd April 2010, 06:50 PM   #123
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Quote:
Originally Posted by toufu View Post
Thanks Bob, what's the value of the Mundorf you used? And I am assuming you parralle the two caps, right?
I am using 2.7μF Mundorf's paralleled (sorry) with .1μF Russian Teflon. I used this first on a Hagerman phono stage and really liked it.
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Old 23rd April 2010, 07:17 PM   #124
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Quote:
Originally Posted by torsken View Post
Ok. I'm up and running. So far I'm very satisfied.

This is what I have put together:

Analog Device AD1865 DAC End 2
Texas Components TX2575 I/V resistors
6N2P-EV (Russian: 6Н2П-ЕВ) tubes
Mundorf silver/gold - 2,2F output capacitors

I noticed the regulator gets hot. Is this how it should be?

Also do this output stage switch the phase of the signal?
Perfect combination!

If you have an input voltage of 12V, thats normal and ok.

The SRPP stage turns the phase to 180 degrees, equal on both channels.
So it doesnt matter.

Today i got a pair of ampohm polyester in oil/aluminium foil 2,2F/630V caps.
Jesus are they huge... I will test them in my DAC vs. my ClarityCaps MR after burning in.

Click the image to open in full size.


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Old 24th April 2010, 05:56 AM   #125
toufu is offline toufu  United States
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Quote:
Originally Posted by flocchini View Post
I am using 2.7μF Mundorf's paralleled (sorry) with .1μF Russian Teflon. I used this first on a Hagerman phono stage and really liked it.
That's Mundorf value I am using as well, gotta give it a shot, thanks!
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Old 1st May 2010, 02:16 PM   #126
torsken is offline torsken  Norway
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So, how do you like your ampohm caps? I have been using the Mundorf silver/gold for some time now. I find them to be a little clinical giving a slightly cold sound. I like my music to be more midrange and not giving to much attention to the top end.

Quote:
Originally Posted by dvb-projekt View Post
Perfect combination!

If you have an input voltage of 12V, thats normal and ok.

The SRPP stage turns the phase to 180 degrees, equal on both channels.
So it doesnt matter.

Today i got a pair of ampohm polyester in oil/aluminium foil 2,2F/630V caps.
Jesus are they huge... I will test them in my DAC vs. my ClarityCaps MR after burning in.

Click the image to open in full size.


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Old 1st May 2010, 05:52 PM   #127
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At the moment they have about 100 hrs. burned in. Compared to the Clarity MR i used before,
they have a phenomenal 3D-soundstage, wonderful lower mids and a punchy base.

From my side, buy them as long you could.

The next i will try is to bypass them with some 0,047uF K72 teflon caps. Lets see...
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Old 1st May 2010, 06:40 PM   #128
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Like this


Click the image to open in full size.
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Old 10th May 2010, 07:39 PM   #129
joemana is offline joemana  United States
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Does someone have a clue on what is the problem with my Tube-I-zator?

I used the Tube-I_Zator twice with the BUF II DAC, I like the sound, but every time I used it for more than 4 hours, there's always this very loud pop/explosion. I know it's not the BUF II because I used it for several days with IVY III without a problem.
The tube that I'm using is 12ax7, with 220Vdc measured voltage at B+. Transformer have four secondary, 150Vac and 6.3Vac., I series connected the two 6.3Vac and had about 13Vdc after the rectifier. Do I got the defective tube?

Joe
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Old 11th May 2010, 07:21 AM   #130
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Originally Posted by joemana View Post
Transformer have four secondary, 150Vac and 6.3Vac., I series connected the two 6.3Vac and had about 13Vdc after the rectifier. Do I got the defective tube?

Joe
Hi Joe,

have you adjust the heater voltage to 6,3V at the measuring point on the left side from the heaterswitch?
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