Finally, an affordable CD Transport: the Shigaclone story - Page 636

TheGimp · 14th October 2012, 05:34 PM

C11 is wrong, 0.1uF should be 1nF. I changed it already.

Flux has been removed with cleaning solvent.

I'll re-solder them tomorrow during my lunch break using the SMT station.

tvicol · 14th October 2012, 05:36 PM

On other hand, I see that you used a polystyrene capacitor in C11 position. Here you need a very low esr cap, like silver-mica or ceramic CG0. Polystyrene have big esr and quite big esl, I would not recomend in this particular place.

Regards,
Tibi

woodturner-fran · 14th October 2012, 09:04 PM

Tibi - thanks indeed. I just wanted a rough indication to start gathering parts for the chassis...

Thanks, and great work!

Fran

TheGimp · 10:38 PM

Thanks Tibi,

I'll see if I can get either at the local electronics shop tomorrow.

I installed two 500pf Silver Mica in parallel, same results.

tvicol · 15th October 2012, 05:33 AM

Quote:

Originally Posted by TheGimp

Thanks Tibi,

I'll see if I can get either at the local electronics shop tomorrow.

I installed two 500pf Silver Mica in parallel, same results.

Don´t forget to chk R1 and R17, these must be 27K.

Regards,
Tibi

TheGimp · 10:12 PM

Well, now this is strange.

I re-soldered the ICs although I believe there was no issue with them. I also inspected every component for integrity of the solder joints and I am sure they are fine. This was done at a SMT solder station on proper equipment, not just with a magnifying glass.

I did change R1 and R17 to be sure they are correct.

Tried it again and same results.

Then I thought...... Maybe it does not like "RETURN TO FOREVER - THE MOTHER SHIP RETURNS".

So I tried "chick corea . return to forever"...

ba-da-bing! Digital data out.

I have not hooked up a D/A yet but will try it later tonight.

So it works, but is marginal and it is finicky about what CD it plays.

.....
Edit - I tried the offending CD in another player.
.....

I got the CD set a couple of weeks ago and listened to the first two CDs.

HA! The CD won't play in any of my CD players (3) so it is a bad CD I guess. I'll have to try a bunch of other CDs to be sure but it might be that the CD was my problem all along!

TheGimp · 15th October 2012, 11:21 PM

Got Audio!

Weeeeeeeeeeeeeeeeeeeeeeeeeee!

tvicol · 16th October 2012, 06:33 AM

Quote:

Originally Posted by TheGimp

Got Audio!

Weeeeeeeeeeeeeeeeeeeeeeeeeee!

Regards,
Tibi

neoinc · 16th October 2012, 06:40 AM

Waiting patiently for my mounted Shiga….

tvicol · 16th October 2012, 06:49 AM

Quote:

Originally Posted by neoinc

Waiting patiently for my mounted Shiga….

Appreciate very much your patience.
This week 3 ready mounted Shiga´s have been already shipped and another 8 are waiting to be packed and shipped.
Each delivery is announced by mail with a postal receipt copy.

Just a reminder, all Shiga documents are available at http://vicol-audio.ro/shiga.php

Regards,
Tibi

14th October 2012, 05:36 PM	#6352
tvicol diyAudio Member Join Date: Jan 2005 Location: Bucharest	On other hand, I see that you used a polystyrene capacitor in C11 position. Here you need a very low esr cap, like silver-mica or ceramic CG0. Polystyrene have big esr and quite big esl, I would not recomend in this particular place. Regards, Tibi __________________ Shigaclone PCB Project Shigaclone BOM Vicol-Audio Vicol-Audio products

14th October 2012, 10:33 PM	#6354
TheGimp diyAudio Member Join Date: Aug 2009 Location: Johnson City, TN	Thanks Tibi, I'll see if I can get either at the local electronics shop tomorrow. I installed two 500pf Silver Mica in parallel, same results. Last edited by TheGimp; 14th October 2012 at 10:38 PM.

15th October 2012, 09:51 PM	#6356
TheGimp diyAudio Member Join Date: Aug 2009 Location: Johnson City, TN	Well, now this is strange. I re-soldered the ICs although I believe there was no issue with them. I also inspected every component for integrity of the solder joints and I am sure they are fine. This was done at a SMT solder station on proper equipment, not just with a magnifying glass. I did change R1 and R17 to be sure they are correct. Tried it again and same results. Then I thought...... Maybe it does not like "RETURN TO FOREVER - THE MOTHER SHIP RETURNS". So I tried "chick corea . return to forever"... ba-da-bing! Digital data out. I have not hooked up a D/A yet but will try it later tonight. So it works, but is marginal and it is finicky about what CD it plays. ..... Edit - I tried the offending CD in another player. ..... I got the CD set a couple of weeks ago and listened to the first two CDs. HA! The CD won't play in any of my CD players (3) so it is a bad CD I guess. I'll have to try a bunch of other CDs to be sure but it might be that the CD was my problem all along! Last edited by TheGimp; 15th October 2012 at 10:12 PM.

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14th October 2012, 05:34 PM	#6351
TheGimp diyAudio Member Join Date: Aug 2009 Location: Johnson City, TN	C11 is wrong, 0.1uF should be 1nF. I changed it already. Flux has been removed with cleaning solvent. I'll re-solder them tomorrow during my lunch break using the SMT station.

14th October 2012, 09:04 PM	#6353
woodturner-fran diyAudio Member Join Date: Jan 2006 Location: Ireland	Tibi - thanks indeed. I just wanted a rough indication to start gathering parts for the chassis... Thanks, and great work! Fran

15th October 2012, 11:21 PM	#6357
TheGimp diyAudio Member Join Date: Aug 2009 Location: Johnson City, TN	Got Audio! Weeeeeeeeeeeeeeeeeeeeeeeeeee!

16th October 2012, 06:40 AM	#6359
neoinc diyAudio Member Join Date: Dec 2008	Waiting patiently for my mounted Shiga….