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Old 1st March 2013, 04:01 AM   #931
ZUM911 is offline ZUM911  Australia
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I have to agree, Oliver is a gentleman and his boards seem first rate to me.

I just want to mention about a suggested supplier in the Red Baron BOM, Analog Metric, so others can be aware. I ordered a pair of the TDA1541A DACS from Analog Metric, and while they don't claim to be selling NOS, these DACs are definitely pulls. And pulled hard! Pry marks suggest one chip has been forced quite hard and the pins are corroded. No response from Analog Metric to emails over the last 2 weeks. Not suggesting Oliver is at fault for his recommended supplier just relating my experience.
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Old 1st March 2013, 05:04 AM   #932
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Quote:
Originally Posted by ZUM911 View Post
I have to agree, Oliver is a gentleman and his boards seem first rate to me.

I just want to mention about a suggested supplier in the Red Baron BOM, Analog Metric, so others can be aware. I ordered a pair of the TDA1541A DACS from Analog Metric, and while they don't claim to be selling NOS, these DACs are definitely pulls. And pulled hard! Pry marks suggest one chip has been forced quite hard and the pins are corroded. No response from Analog Metric to emails over the last 2 weeks. Not suggesting Oliver is at fault for his recommended supplier just relating my experience.
Thanks for your experience.
I will immediately cancel Analog Metric from my BOM recommendation!

I had no problems in the past, but this is a no go!
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Old 1st March 2013, 07:12 AM   #933
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Originally Posted by dvb-projekt View Post
The price performance ratio of the K75-10 is good. Also the sound is really nice.
Bypassed with a FT3 teflon is a good idea. Go ahead!
Oliver how would you compare sound of K75-10 with / no FT-3 to new Mundorf Evo / Evo Oil
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Old 1st March 2013, 08:26 AM   #934
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Originally Posted by samoloko View Post
Oliver how would you compare sound of K75-10 with / no FT-3 to new Mundorf Evo / Evo Oil
Till now i havent the chance to test the new Mundorf MCap EVO Series, but what they have do technical looks very promising!
Attached Files
File Type: pdf Mundorf MCap EVO Series.pdf (796.4 KB, 32 views)
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Old 3rd March 2013, 01:31 AM   #935
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Hi Oliver,

What are you personally using for I/V stage these days? Still Tube-i-zator, or do you prefer one of the other stages like the EC-designs 7 or DDNF? Can you describe some of the qualities of each type you've tried please.

Many thanks
Lucas
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Old 3rd March 2013, 10:39 AM   #936
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Quote:
Originally Posted by LucasAdamson View Post
Hi Oliver,

What are you personally using for I/V stage these days? Still Tube-i-zator, or do you prefer one of the other stages like the EC-designs 7 or DDNF? Can you describe some of the qualities of each type you've tried please.

Many thanks
Lucas
Hi Lucas,

a am still using the Tube-I-zator with a new I/V resistor, the Rhopoint Squaristor GG102A. This one clearly beats the TX-2575 i this position.
In my rig and with my B+ Tube-Rectifier and separate SSHV for each channel, it is still my favorite.

You could read a small review of the DDNF HERE.

The onboard MK7 I/V stage from John tend to the DDNF. Also very punchy.

In the end it depends on your rig and your taste.


Best regards,
Oliver

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Old 4th March 2013, 09:13 AM   #937
Ceglar is offline Ceglar  Australia
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Originally Posted by crobbins5421 View Post
6. Ian FIFO works flawlessly - Bravo!
Hi,

I'm thinking to do something similar.

I'd like to ask if the I2S output at the FIFO reclocker is 3.3V, and if so, how do you find the I2S attenuators performing on the DAC board which have values set up for 5V?


Thanks,
Shane
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Old 4th March 2013, 11:38 AM   #938
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Originally Posted by Ceglar View Post
Hi,

I'm thinking to do something similar.

I'd like to ask if the I2S output at the FIFO reclocker is 3.3V, and if so, how do you find the I2S attenuators performing on the DAC board which have values set up for 5V?


Thanks,
Shane
Yes, the output is 3.3V. The sound is excellent. I'm not very good at "audio speak", but the bass attack and instrumental timbre is excellent. ZERO harshness in the upper frequencies.

To get The Red Baron to work, one way is to only use 1K resistors for each I2S input.
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Old 5th March 2013, 02:04 AM   #939
Ceglar is offline Ceglar  Australia
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Originally Posted by crobbins5421 View Post
Yes, the output is 3.3V.
To get The Red Baron to work, one way is to only use 1K resistors for each I2S input.
Thanks for this.. there are so many pages on that ECdesign thread. After much reading I found post #4612.

So, you're using 1k series resistors from DATA and WS to the respective inputs on the 1541A, and bias these inputs at 1.33V with 1k + 680 voltage divider across the 3v3 supply, with no series R or bias voltage for BCK input ?

Thanks,
Shane
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Old 5th March 2013, 02:22 AM   #940
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Originally Posted by Ceglar View Post
Thanks for this.. there are so many pages on that ECdesign thread. After much reading I found post #4612.

So, you're using 1k series resistors from DATA and WS to the respective inputs on the 1541A, and bias these inputs at 1.33V with 1k + 680 voltage divider across the 3v3 supply, with no series R or bias voltage for BCK input ?

Thanks,
Shane
BCK input gets a 1K resistor as well.

The three 1K resistors occupy (on The Red Baron) the 3K3, 3K3, and 100R positions. I2S input on DATA and FS is same as the board lists. BCK needs to go in the hole next to the new 1K resistor (occupying the 100R spot - trace connected).

I also cut the trace (TDA 1541A chip) from pin 3 to pin 4 and soldered a jumper from pin 4 to pin 5.
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