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Old 28th August 2004, 05:02 PM   #1
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Default PT Cardinal

Hi

I have got a cardinal transport + ordinal DAC (with the HDCD unit). I like the sound of it, but witg some CD's the Cardinal get in rea trouble, causing cracks or even stops playing. Anybody knows which unit/brand this transport uses? Should it be easy to replace?

And what are your thoughts about this combination, soundwise?

Thanks all
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Old 28th August 2004, 09:35 PM   #2
JohnW is offline JohnW  Hong Kong
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I'm not sure what version of transport you have - any chance of posting a picture (also an internal photo would be better).

If it’s an early unit then it uses a Sanyo Pick-up (maybe they all did?) - but normally re-adjusting the servo board will resolve the issues. If not I can find the part # - and maybe have a couple of spare heads.

I believe the Sanyo pick-up had “91” at the end – but can confirm by the end of next week.

John
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Old 30th August 2004, 07:39 PM   #3
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Default To John W

Thanks for replying. Tomorrow a friend will come with his camera and we will take some pictures.
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Old 30th August 2004, 07:54 PM   #4
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I used to have a Cardinal and although with the DaCapo it sounded really good it was abysmal at tracking. Almost any modern transport will do better, if you can get hold of a re-clock circuit to reduce jitter then I would say that would be a better bet than replacing an old transport mechanism.
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Old 3rd September 2004, 08:23 PM   #5
jives11 is offline jives11  Europe
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Default funnily enough

funnily enough today I noticed my Cambridge DISCmagic transport has some odd problems with certain CD's. I'm not sure but I think this may have something in common with the Cardinal. - I think they both offer synclock.


Anyway the problem I see is with some longer CD's i.e over 70 minutes , it seems to jump around on the last few tracks i.e the outer ones. It''s not like when you have a scratch or hair, this behaves like it plays a fraction of a seconds music then jumps forward back, playing the briefest bits. My trusty CD104 plays the disc no problem.


Maybe the Transport needs an inspection. Otherwise plays fine
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Old 3rd September 2004, 10:07 PM   #6
JohnW is offline JohnW  Hong Kong
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Both the PT Cardinal and Cambridge Audio CD4, CD6 & CDT use the same Servo chipset (and design) and Sanyo Laser Pickup / loader. When the original CD spec. was defined, the maxim playback time was I believe about 63 Minutes – this has since been extended to 70minutes? – some early generation designs are OK with this - others not! Don’t even mention CDR’s or worst CDRW.

The servo chipset Sony CXD1167 (CXD1125 with internal Ram) and Sanyo pick-up (with fixed gain) are basically first generation units – and cannot (could not) match the performance of the Philips based units of the time.

Note: - the CD4SE uses Philips CDM12.1 based Servo / Pick up.
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Old 3rd September 2004, 10:50 PM   #7
guido is offline guido  Netherlands
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Scary...

Just got back from a monthly meeting i have with some pals and somebody gave me a sanyo pickup. So i had a look on the net and found it at some spare part companies.

Was actually looking for cdp's where it was used. Could not find much, so i just looked here for a moment to c what is new.

And found this thread. The thing i got seems to be a SF91-5-6, where the 5&6 seem to be the number of pins on two connectors (?). There is one 91 with more pins, but it does not seem to have a chip on-board (jrc,8 pens ~opamp i guess).

My transport is actually not used, so now i know what dead cdp's too look for (thanks). Pic is from camera phone without much light, so a bit fuzzy.

Greetings,
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File Type: jpg sf91-5-6.jpg (33.1 KB, 258 views)
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Old 3rd September 2004, 11:13 PM   #8
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Quote:
Originally posted by JohnW
When the original CD spec. was defined, the maxim playback time was I believe about 63 Minutes – this has since been extended to 70minutes?
Not quite like that, sort of.
When Philips and Sony were developing the CD, Philips had established that it would be 16bits/48khz sampling.
That gave a running time of around 60 minutes.
Sony's president (Mr. Morita?) at the time insisted that Beethoven's 9th symphony had to fit on one disc.
He insisted so much that Philips and Sony agreed to change the CD spec to 16bit/44.1khz, giving a running time of 74 minutes.

We must thank Mr. Morita for making it even worse than was initially planed.
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Old 4th September 2004, 09:49 AM   #9
JohnW is offline JohnW  Hong Kong
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“Standard size disc, Philips recommends that the playing time of a Compact Disc should not exceed 74 minutes 44 Seconds. However, most CD players will play Disc up to 80 minutes duration. CDs exceeding the recommended playing time of 74 minutes 44 seconds, may not play satisfactorily on some CD players.”
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Old 4th September 2004, 12:00 PM   #10
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This is the picture of the transport - finally.

I got this transport + DAC for little money because it's old and was not working right. I thought it could be fixed and still be good for the also old fashioned 16bits 44.1khz CD. (Don't want to start a discussion about this, however.)
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