DX Blame Group Buy - Page 3

fmeyer · 3rd September 2010, 06:50 AM

Great =)

Count me in,

2X amp boards
2X PSU
2X speaker protector

regards fmeyer

chlorofille · 3rd September 2010, 06:56 AM

Fashionable quality =)
Rudi, what circumstances would cause stability issues with the Blame ES?
I am currently using ported 4ohm 2 way speakers with a 2nd order crossover, minimum impedance dip is 2.7 Ohms.

Rudi_Ratlos · 3rd September 2010, 07:28 AM

@Chlorofille,

in the evaluation phase of the 1st version of the DX Blame, the ES version, Carlos tortured it with 20 - 50 KHz rectangular waves
and even inserted microphone feedback to the input at the same time.
These tortures sometimes caused stability issues with the BlameES version.

In normal life - when you listen to your CDP, to your PC-files, ... - you will not be aware of any stability issues.
I know several (a lot of) BlameES AMPs that play flawlessly since months.

But since Carlos accepts the responsibility for his AMP designs he will tell you: "Build the BlameES at your own risk."

The BlameST version plays stable under every circumstance.

Best regards - Rudi_Ratlos

chlorofille · 3rd September 2010, 07:31 AM

thanks - much appreciated

Rudi_Ratlos · 3rd September 2010, 09:41 AM

In this post I want to inform you about the price of a PSU PCB having the same design and quality as the AMP PCB.

The dimensions of the PCB will be 127 x 82 mm.

Taking into account the additional toll and shipment costs the price for a single PSU PCB will be 13€!

If those of you, who have signalled interest in a PSU PCB, say: "I want to have it anyway!" - I will order.
Please tell me (either via PM or in this thread).

Best regards - Rudi_Ratlos

keith_correa · 3rd September 2010, 11:21 AM

Hi Rudi,

Can I have 2 PSU + 2 SP boards?

Carolina · 3rd September 2010, 11:35 AM

How much 2 PCBs cost + 1 Power Supply Board?

Thanks you

Mario_JR · 4th September 2010, 03:01 AM

I want to have it ( PSU ) anyway.

How many members do you need to start ordering?

What about to creating a google docks spreadsheet?

Thanks again

Rudi_Ratlos · 11:11 AM

Dear DX Blame friends,

METAL and I finished the layout of the PSU for the DX Blame this morning.

This is how the copper side of the PCB will look like:

The schematics follows Carlos' PSU design published on Greg's Web Site .
The dimensions of the PCB will be 126 x 85mm.
I will provide you the BoM for the PSU.

The layout is inspired by Miguel Nabuco, the technical head of the Brazilian division of Carlos' imaginary DX Corp Intl.

The layout will support both 1 transformer and 2 transformers solutions.
There will be special PADs to connect the PSU to the LS Protect PCBs as well.

The PSU PCBs will be etched using the red-gold DX AMP design, white silksreen on the component side and 70 µm copper tracks.

Best regards - Rudi_Ratlos

Rudi_Ratlos · 4th September 2010, 11:34 AM

I will close the first roundup of this group-buy tomorrow.
I will then inform you about the commercial aspects.

Best regards - Rudi_Ratlos

3rd September 2010, 11:35 AM	#27
Carolina Banned Join Date: Aug 2010	Pcb price How much 2 PCBs cost + 1 Power Supply Board? Thanks you

4th September 2010, 11:07 AM	#29
Rudi_Ratlos diyAudio Member Join Date: Jun 2009 Location: Hamburg / Germany	Dear DX Blame friends, METAL and I finished the layout of the PSU for the DX Blame this morning. This is how the copper side of the PCB will look like: The schematics follows Carlos' PSU design published on Greg's Web Site . The dimensions of the PCB will be 126 x 85mm. I will provide you the BoM for the PSU. The layout is inspired by Miguel Nabuco, the technical head of the Brazilian division of Carlos' imaginary DX Corp Intl. The layout will support both 1 transformer and 2 transformers solutions. There will be special PADs to connect the PSU to the LS Protect PCBs as well. The PSU PCBs will be etched using the red-gold DX AMP design, white silksreen on the component side and 70 µm copper tracks. Best regards - Rudi_Ratlos Last edited by Rudi_Ratlos; 4th September 2010 at 11:11 AM.

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3rd September 2010, 06:50 AM	#21
fmeyer diyAudio Member Join Date: Jul 2010	Great =) Count me in, 2X amp boards 2X PSU 2X speaker protector regards fmeyer

3rd September 2010, 06:56 AM	#22
chlorofille diyAudio Member Join Date: Jul 2008 Location: Christchurch	Fashionable quality =) Rudi, what circumstances would cause stability issues with the Blame ES? I am currently using ported 4ohm 2 way speakers with a 2nd order crossover, minimum impedance dip is 2.7 Ohms.

3rd September 2010, 07:28 AM	#23
Rudi_Ratlos diyAudio Member Join Date: Jun 2009 Location: Hamburg / Germany	@Chlorofille, in the evaluation phase of the 1st version of the DX Blame, the ES version, Carlos tortured it with 20 - 50 KHz rectangular waves and even inserted microphone feedback to the input at the same time. These tortures sometimes caused stability issues with the BlameES version. In normal life - when you listen to your CDP, to your PC-files, ... - you will not be aware of any stability issues. I know several (a lot of) BlameES AMPs that play flawlessly since months. But since Carlos accepts the responsibility for his AMP designs he will tell you: "Build the BlameES at your own risk." The BlameST version plays stable under every circumstance. Best regards - Rudi_Ratlos

3rd September 2010, 07:31 AM	#24
chlorofille diyAudio Member Join Date: Jul 2008 Location: Christchurch	thanks - much appreciated

3rd September 2010, 09:41 AM	#25
Rudi_Ratlos diyAudio Member Join Date: Jun 2009 Location: Hamburg / Germany	In this post I want to inform you about the price of a PSU PCB having the same design and quality as the AMP PCB. The dimensions of the PCB will be 127 x 82 mm. Taking into account the additional toll and shipment costs the price for a single PSU PCB will be 13€! If those of you, who have signalled interest in a PSU PCB, say: "I want to have it anyway!" - I will order. Please tell me (either via PM or in this thread). Best regards - Rudi_Ratlos

3rd September 2010, 11:21 AM	#26
keith_correa diyAudio Member Join Date: Jan 2009 Location: Bombay [aka Mumbai]	Hi Rudi, Can I have 2 PSU + 2 SP boards?

4th September 2010, 03:01 AM	#28
Mario_JR diyAudio Member Join Date: Jan 2005 Location: Sao Paulo	I want to have it ( PSU ) anyway. How many members do you need to start ordering? What about to creating a google docks spreadsheet? Thanks again

4th September 2010, 11:34 AM	#30
Rudi_Ratlos diyAudio Member Join Date: Jun 2009 Location: Hamburg / Germany	I will close the first roundup of this group-buy tomorrow. I will then inform you about the commercial aspects. Best regards - Rudi_Ratlos

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