Finally, an affordable CD Transport: the Shigaclone story - Page 112

Pendergast · 31st May 2008, 02:49 PM

Hello!

It "works": the disk is actually spinning (some wobbling though), and there is something coming out of the DAC (I am using Peter's DAC).

However, the sound is far from clear: I can figure out a structure in the sound, but that cannot be called music.

I did all the mods suggested in the .pdf of okapi, and plugged the "Dout" and "GND" to feed the DAC, but I have not used the 2 items of A2 and A1 (2 blue resistors BERN5501000 AND BERN5503010).

I also did the jumper 5A to 5B.

Am I missing something?

By the way, this is a very exciting project. I am having a ball, but circuits are my weakness.

Thanks!

JC Fardo · 31st May 2008, 05:11 PM

According to OkapiÂ´s mods.

[IMG]CAP 3 & 4[/IMG]

kevinkr · 31st May 2008, 05:16 PM

Quote:

Originally posted by Pendergast
Hello!

It "works": the disk is actually spinning (some wobbling though), and there is something coming out of the DAC (I am using Peter's DAC).

However, the sound is far from clear: I can figure out a structure in the sound, but that cannot be called music.

I did all the mods suggested in the .pdf of okapi, and plugged the "Dout" and "GND" to feed the DAC, but I have not used the 2 items of A2 and A1 (2 blue resistors BERN5501000 AND BERN5503010).

I also did the jumper 5A to 5B.

Am I missing something?

By the way, this is a very exciting project. I am having a ball, but circuits are my weakness.

Thanks!

Are those two resistors you mention the ones used on Dout (spdif) - if so your dac may not like the nearly 5Vpp present on Dout. Use the resistors.

Pendergast · 31st May 2008, 05:17 PM

José.

I did remove cap 3 and 4. The only thing I have done differently was to not put the rikens.

The DAC orks perfectly also; I have been using it daily for several hours a day for the last year or so without a problem.

Pendergast · 31st May 2008, 05:28 PM

Quote:

Originally posted by kevinkr

Are those two resistors you mention the ones used on Dout (spdif) - if so your dac may not like the nearly 5Vpp present on Dout. Use the resistors.

OK, but which should I use where?

BE RN5501000 and BE RN5503010

I cannot find references as to where these should go...

Peter Daniel · 31st May 2008, 05:33 PM

Quote:

Originally posted by Pendergast

OK, but which should I use where?

BE RN5501000 and BE RN5503010

I cannot find references as to where these should go...

Those are 100ohm and 300ohm.

300ohm is series resistor (A1), 100ohm is shunt (A2), if you follow Okapi's mods.

Pendergast · 31st May 2008, 05:52 PM

That was it!!!!

I guess I had a wrong version of Okapi's .pdf because it referred to Vishay's and Caddocks so I was confused...
But it is working now, and the sound is clear: music!

This is so exciting!!!!

Thank you so much for this project! Thank you all as well for the pictures and suggestions!

Woaw!

Pendergast · 31st May 2008, 10:12 PM

Little note on suspension.

I am using 1/4 - 20 oven bolts to attach the transport to a 3/4 inch plywood piece (russian birch) and use the green fluo rubber coming with the original set.

A 170 pound man falling from six inches cannot make it skip...

The plywood base of the transport is supported by three spikes. The chassis will be an aluminum cover, with a surrounding box in Jerusalem Gold stone, 1 inch thick, 6 inches high by 8 inches in width, and 10 inches in lenght. The power supply will be external.

The transport itseld should weight about 25 pounds minimum.

No need for springs I think...

r8833 · 1st June 2008, 12:47 AM

Quote:

I am using 1/4 - 20 oven bolts to attach the transport to a 3/4 inch plywood piece (russian birch) and use the green fluo rubber coming with the original set.

I also prefer transport mounted on wood slightly less mechanical sounding..

thekop-bkk · 1st June 2008, 07:00 AM

Quote:

Originally posted by Pendergast
Little note on suspension.

I am using 1/4 - 20 oven bolts to attach the transport to a 3/4 inch plywood piece (russian birch) and use the green fluo rubber coming with the original set.

A 170 pound man falling from six inches cannot make it skip...

The plywood base of the transport is supported by three spikes. The chassis will be an aluminum cover, with a surrounding box in Jerusalem Gold stone, 1 inch thick, 6 inches high by 8 inches in width, and 10 inches in lenght. The power supply will be external.

The transport itseld should weight about 25 pounds minimum.

No need for springs I think...

Can u post pictures? Thanks...

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31st May 2008, 02:49 PM	#1111
Pendergast diyAudio Member Join Date: Apr 2006 Location: Montreal	Hello! It "works": the disk is actually spinning (some wobbling though), and there is something coming out of the DAC (I am using Peter's DAC). However, the sound is far from clear: I can figure out a structure in the sound, but that cannot be called music. I did all the mods suggested in the .pdf of okapi, and plugged the "Dout" and "GND" to feed the DAC, but I have not used the 2 items of A2 and A1 (2 blue resistors BERN5501000 AND BERN5503010). I also did the jumper 5A to 5B. Am I missing something? By the way, this is a very exciting project. I am having a ball, but circuits are my weakness. Thanks!

31st May 2008, 05:17 PM	#1114
Pendergast diyAudio Member Join Date: Apr 2006 Location: Montreal	José. I did remove cap 3 and 4. The only thing I have done differently was to not put the rikens. The DAC orks perfectly also; I have been using it daily for several hours a day for the last year or so without a problem.

31st May 2008, 05:52 PM	#1117
Pendergast diyAudio Member Join Date: Apr 2006 Location: Montreal	That was it!!!! I guess I had a wrong version of Okapi's .pdf because it referred to Vishay's and Caddocks so I was confused... But it is working now, and the sound is clear: music! This is so exciting!!!! Thank you so much for this project! Thank you all as well for the pictures and suggestions! Woaw!

31st May 2008, 10:12 PM	#1118
Pendergast diyAudio Member Join Date: Apr 2006 Location: Montreal	Little note on suspension. I am using 1/4 - 20 oven bolts to attach the transport to a 3/4 inch plywood piece (russian birch) and use the green fluo rubber coming with the original set. A 170 pound man falling from six inches cannot make it skip... The plywood base of the transport is supported by three spikes. The chassis will be an aluminum cover, with a surrounding box in Jerusalem Gold stone, 1 inch thick, 6 inches high by 8 inches in width, and 10 inches in lenght. The power supply will be external. The transport itseld should weight about 25 pounds minimum. No need for springs I think...