UcD400 Q & A - Page 175

mrtech · 28th February 2010, 10:25 AM

what xo or dsp do you use?

Cobra2 · 28th February 2010, 04:31 PM

UcD 400 HG + Hxr, Sjöström PSU (8 x 10 000uF), Antek 1500VA/2x40V trafo, Jensen JT-11P-1 line-input-trafos.

Arne K

avr300 · 28th February 2010, 04:50 PM

Cooling capacity is indeed more than enough. Btw, nice work.

TicksNLeeches · 28th February 2010, 09:28 PM

Quote:

Originally Posted by Cobra2

UcD 400 HG + Hxr, Sjöström PSU (8 x 10 000uF), Antek 1500VA/2x40V trafo, Jensen JT-11P-1 line-input-trafos.

Arne K

Hi Arne, you should give the DC supply and speaker wires the same respect you gave to the mains wires, even more so.

maxlorenz · 4th March 2010, 04:34 PM

Hi Cobra2,

I think "overkill" is an underestimation in your case

Looks cool, man.

In my case, I think a very good PS is not enough:
I have tried some tweaks, like -ECdesigns-'s "charge-transfer supply" to great effect, both in UCD and in my DX HR II amps.
Also worthy is regulation with "PowerReg" from Teddy Pardo, of which I had great experience but with only 30VDC. Soon I will install those in my UCD180 and see if I manage to get 40VDC (uses LM317).

Another of -ECdesigns- ideas is the "stepped rectifier" which will also be tested soon. Much cheaper option.

Congratulations,
M.

Cobra2 · 4th March 2010, 05:03 PM

Thanx, they do a great job now. Beeing compared with the best...

Arne K

maxlorenz · 4th March 2010, 06:40 PM

Wow, very pretty.

We use more or less comparable systems

Picasa Web Albums - mauricio

Though mine are not original...

Regards,
M.

Melon Head · 15th May 2010, 12:30 AM

I didn't get to read every page (175 pages is quite a few).
Anyway these look like they may be worthy of my next project.
Can anyone comment how these ucd amps compare to Nelson Pass' F5, or Aleph 2 Amplifier.
I am thinking of getting the UCD400HG modules.

Yves Smolders · 1st October 2010, 07:04 PM

Quote:

Originally Posted by Cobra2

UcD 400 HG + Hxr, Sjöström PSU (8 x 10 000uF), Antek 1500VA/2x40V trafo, Jensen JT-11P-1 line-input-trafos.

Arne K

Awesome cases, care to share the source?

Cobra2 · 1st October 2010, 08:37 PM

Quote:

Originally Posted by Yves Smolders

Awesome cases, care to share the source?

Try fleabay...

Arne K

4th March 2010, 04:34 PM	#1745
maxlorenz diyAudio Member Join Date: Oct 2003 Location: osorno , Chile	Hi Cobra2, I think "overkill" is an underestimation in your case Looks cool, man. In my case, I think a very good PS is not enough: I have tried some tweaks, like -ECdesigns-'s "charge-transfer supply" to great effect, both in UCD and in my DX HR II amps. Also worthy is regulation with "PowerReg" from Teddy Pardo, of which I had great experience but with only 30VDC. Soon I will install those in my UCD180 and see if I manage to get 40VDC (uses LM317). Another of -ECdesigns- ideas is the "stepped rectifier" which will also be tested soon. Much cheaper option. Congratulations, M. __________________ "Thou shall build big horn speakers"

4th March 2010, 06:40 PM	#1747
maxlorenz diyAudio Member Join Date: Oct 2003 Location: osorno , Chile	Wow, very pretty. We use more or less comparable systems Picasa Web Albums - mauricio Though mine are not original... Regards, M. __________________ "Thou shall build big horn speakers"

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28th February 2010, 10:25 AM	#1741
mrtech diyAudio Member Join Date: Oct 2006	what xo or dsp do you use?

28th February 2010, 04:50 PM	#1743
avr300 diyAudio Member Join Date: Sep 2005 Location: DK	Cooling capacity is indeed more than enough. Btw, nice work.

15th May 2010, 12:30 AM	#1748
Melon Head Banned Join Date: Nov 2006	I didn't get to read every page (175 pages is quite a few). Anyway these look like they may be worthy of my next project. Can anyone comment how these ucd amps compare to Nelson Pass' F5, or Aleph 2 Amplifier. I am thinking of getting the UCD400HG modules.