Pearl (one) Build - Page 2

blackdod · 22nd November 2011, 07:13 PM

Very interesting.

Basically the course is:

Ground board-----post (isolated)---- chasis

¿Not?

Regards

6L6 · 22nd November 2011, 07:17 PM

Yes, that is what worked for me. Wayne suggested to start with the chassis not connected, as it can be quieter that way. I tried it, but connecting the chassis was quieter. Try it both ways, one will be better.

blackdod · 22nd November 2011, 07:30 PM

My setup is much more complicated but I have to keep trying.

Out put ground--- post (isolated)--- Ground Loop Breaker---- IEC earth

6L6 · 22nd November 2011, 07:51 PM

I do not have the PSU IEC earth connected to the RIAA box. The safety earth is only in the chassis that holds the PSU. The umbilical has only DC + and - , those connect to the RIAA circuit board, and never touch the chassis.

What noise I have in the circuit is the same regardless if the PSU is powered on or not, and even if it's connected or not! There are no bleeders in the power supply, the circuit will run for about 40 seconds once the power is off. About 30 seconds if you unplug the umbilical completely. There is a lot of supply capacitance.

I need to try a groundbreaker on the RIAA chassis connection. That will be my next step.

blackdod · 22nd November 2011, 08:14 PM

I will test your configuration of Ground

rizqi · 8th March 2012, 02:20 PM

@6L6
can you share scheme v2?..
regards...

6L6 · 8th March 2012, 08:01 PM

Quote:

Originally Posted by rizqi

can you share scheme v2?

I'm not sure what you mean...

I will be happy to help, can you be more specific? Thanks!

Dzius · 11th April 2012, 07:03 PM

Here is my version on PCB's which have been done by myself.
Pearl_foto1.jpg
Pearl_foto2.jpg

blackdod · 11th April 2012, 07:41 PM

Beautiful!

6L6 · 11th April 2012, 08:30 PM

Pearl 2 boards! Very nice! I like the look of the mirror-image.

Don't forget to use the PCB starground - the hole above C12 and below C4.

22nd November 2011, 07:17 PM	#12
6L6 diyAudio Member Join Date: Oct 2010 Location: Denver, Colorado	Yes, that is what worked for me. Wayne suggested to start with the chassis not connected, as it can be quieter that way. I tried it, but connecting the chassis was quieter. Try it both ways, one will be better. __________________ Pass Labs Pearl Phono -- Pass B1 Preamp -- Pass F5 amplifier -- Pass Labs Pearl 2

22nd November 2011, 07:51 PM	#14
6L6 diyAudio Member Join Date: Oct 2010 Location: Denver, Colorado	I do not have the PSU IEC earth connected to the RIAA box. The safety earth is only in the chassis that holds the PSU. The umbilical has only DC + and - , those connect to the RIAA circuit board, and never touch the chassis. What noise I have in the circuit is the same regardless if the PSU is powered on or not, and even if it's connected or not! There are no bleeders in the power supply, the circuit will run for about 40 seconds once the power is off. About 30 seconds if you unplug the umbilical completely. There is a lot of supply capacitance. I need to try a groundbreaker on the RIAA chassis connection. That will be my next step. __________________ Pass Labs Pearl Phono -- Pass B1 Preamp -- Pass F5 amplifier -- Pass Labs Pearl 2

8th March 2012, 02:20 PM	#16
rizqi diyAudio Member Join Date: Nov 2011 Location: central java	@6L6 can you share scheme v2?.. regards... __________________ Salam Asololee...

11th April 2012, 08:30 PM	#20
6L6 diyAudio Member Join Date: Oct 2010 Location: Denver, Colorado	Pearl 2 boards! Very nice! I like the look of the mirror-image. Don't forget to use the PCB starground - the hole above C12 and below C4. __________________ Pass Labs Pearl Phono -- Pass B1 Preamp -- Pass F5 amplifier -- Pass Labs Pearl 2

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22nd November 2011, 07:13 PM	#11
blackdod diyAudio Member Join Date: Jun 2011 Location: Canarias	Very interesting. Basically the course is: Ground board-----post (isolated)---- chasis ¿Not? Regards

22nd November 2011, 07:30 PM	#13
blackdod diyAudio Member Join Date: Jun 2011 Location: Canarias	My setup is much more complicated but I have to keep trying. Out put ground--- post (isolated)--- Ground Loop Breaker---- IEC earth

22nd November 2011, 08:14 PM	#15
blackdod diyAudio Member Join Date: Jun 2011 Location: Canarias	I will test your configuration of Ground

11th April 2012, 07:03 PM	#18
Dzius diyAudio Member Join Date: Sep 2010 Location: Warsaw	Here is my version on PCB's which have been done by myself. Pearl_foto1.jpg Pearl_foto2.jpg

11th April 2012, 07:41 PM	#19
blackdod diyAudio Member Join Date: Jun 2011 Location: Canarias	Beautiful!

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