Paradise Builders - Page 113

hesener · 16th January 2013, 11:59 AM

Quote:

Originally Posted by Marra

My boards are powered and sat on a shelf with voltages as posted by Alfred in his replies to quan and pin 6 on one fluctuating around 0.5V and the other 1.5V.Outputs are fluctuating around 200mv.hopefully things will settle after a few days.Would it be better to case them up to aid things in settling?

these values are just fine. no need to case them for settling, its the elcaps forming (the voltage across them is fixing the little holes in the oxide, which is the cause for the leakage currents that elcaps tend to show fresh out of the bag).

Bksabath · 16th January 2013, 12:48 PM

Quote:

Originally Posted by Marra

My boards are powered and sat on a shelf with voltages as posted by Alfred in his replies to quan and pin 6 on one fluctuating around 0.5V and the other 1.5V.Outputs are fluctuating around 200mv.hopefully things will settle after a few days.Would it be better to case them up to aid things in settling?

One could just plug in the caps to a LM317 and live them under charge at nominal voltage while soldering the other components

This would save loads of time fiddling with the offset...
And will form caps faster

analog_sa · 16th January 2013, 12:50 PM

Quote:

Originally Posted by Marra

Outputs are fluctuating around 200mv.hopefully things will settle after a few days.

Have you scoped the outputs?

quan · 17th January 2013, 06:15 AM

Hi guys, could not wait . Finally plug it in . Loading resistor 150R . Catridge mod esc stylus midas body 103, apparition tonearm N GARRARD 301. The sound is relax but detailed and tonality is very good. The main problem is hum in both chanels .
quan

Bksabath · 17th January 2013, 06:16 AM

Look at grounding Board do not pick up much so got to be cables

quan · 17th January 2013, 06:39 AM

Hi Sandro, i will need to study the grounding scheme .

Marra · 17th January 2013, 08:57 AM

Quote:

Originally Posted by analog_sa

Have you scoped the outputs?

No scope just a couple of dmm's.

PMA · 17th January 2013, 10:35 AM

If someone wants to DIY a thing that is so complex as this one, he absolutely needs a scope. DMM is good quite for nothing, it is only an elementary tool. Don't believe those who tell you that as a DIYer you do not need a scope.

You do not need to buy an expensive instrument. It can be just a USB device like this:

USBscope50 1Gsps/75Mhz USB pen-style DSO (Digital Storage Oscilloscope), Synchrotech

But even stand alone instruments are not expensive:
Uni-Trend Group Limited

Every serious DIYer should have a scope, otherwise his results are just accidental.

Marra · 17th January 2013, 01:55 PM

Point taken.

hesener · 17th January 2013, 02:05 PM

Updated assembly guide with the latest proposals on compensating the CCS in the power supply section if needed, and the RIAA time constants.

17th January 2013, 10:35 AM	#1128
PMA diyAudio Member Join Date: Apr 2002 Location: Prague, Kitakyushu, Fukuoka	If someone wants to DIY a thing that is so complex as this one, he absolutely needs a scope. DMM is good quite for nothing, it is only an elementary tool. Don't believe those who tell you that as a DIYer you do not need a scope. You do not need to buy an expensive instrument. It can be just a USB device like this: USBscope50 1Gsps/75Mhz USB pen-style DSO (Digital Storage Oscilloscope), Synchrotech But even stand alone instruments are not expensive: Uni-Trend Group Limited Every serious DIYer should have a scope, otherwise his results are just accidental. __________________ Pavel Macura http://www.linkedin.com/pub/pavel-macura/4/783/637 http://web.telecom.cz/macura/audiopage.html

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17th January 2013, 06:15 AM	#1124
quan diyAudio Member Join Date: Feb 2007 Location: sydney	Hi guys, could not wait . Finally plug it in . Loading resistor 150R . Catridge mod esc stylus midas body 103, apparition tonearm N GARRARD 301. The sound is relax but detailed and tonality is very good. The main problem is hum in both chanels . quan

17th January 2013, 06:16 AM	#1125
Bksabath diyAudio Member Join Date: Dec 2007	Look at grounding Board do not pick up much so got to be cables

17th January 2013, 06:39 AM	#1126
quan diyAudio Member Join Date: Feb 2007 Location: sydney	Hi Sandro, i will need to study the grounding scheme .

17th January 2013, 01:55 PM	#1129
Marra diyAudio Member Join Date: Nov 2009 Location: Near Lincoln	Point taken.