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Old 31st May 2008, 02:49 PM   #1111
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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!
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Old 31st May 2008, 05:11 PM   #1112
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Default Just for the record


According to Okapi´s mods.

[IMG]CAP 3 & 4[/IMG]
Attached Images
File Type: jpg 898349_1_cap3_4.jpg (91.6 KB, 1784 views)
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Old 31st May 2008, 05:16 PM   #1113
kevinkr is offline kevinkr  United States
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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.
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Old 31st May 2008, 05:17 PM   #1114
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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.
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Old 31st May 2008, 05:28 PM   #1115
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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...
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Old 31st May 2008, 05:33 PM   #1116
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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.
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Old 31st May 2008, 05:52 PM   #1117
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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!
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Old 31st May 2008, 10:12 PM   #1118
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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...
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Old 1st June 2008, 12:47 AM   #1119
r8833 is offline r8833  Canada
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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..
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Old 1st June 2008, 07:00 AM   #1120
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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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