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Old 12th February 2013, 07:32 PM   #6701
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Join Date: Jul 2004
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Same here with building a salas 8v reg. I found this by Peter; (refers to the current drawn?):

"I measured it once and IIRC it was prrox 250-300mA at start up and about half of that at normal play."

The CD Transport

When you figure out what resistors to use (R101, R105 etc) in the Salas reg, appreciate it if you could let me know so I can check if I calculated them correctly.

Thanks



Quote:
Originally Posted by tubo View Post
Hi guys,

Im building a salas 8v regulator for power supply. Can someone pls tell me what is the current load of the whole unit.

Thanks

Last edited by marcus1; 12th February 2013 at 07:38 PM.
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Old 12th February 2013, 08:50 PM   #6702
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Default Thanks a lot Tvicol

Hi Tvicol,
Thanks a lot for your long and hard work, and anyone involved in this project,
I have so much learn the last 2-3 years, so still 2 kits stored, for the near future.
Regards,
Zjaakco
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Old 12th February 2013, 11:21 PM   #6703
tubo is offline tubo  Philippines
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Hi Marcus 1,

thanks for the info. based on my calculations for an 8V dc out with 500 mA ccs, the value for R101= 6.6ohm, and R105= 830 ohms.

i haven't completed the regulator as of yet as im waiting for the parts.

thanks
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Old 13th February 2013, 07:43 AM   #6704
Dimitris
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Quote:
Originally Posted by tubo View Post
Hi Marcus 1,

thanks for the info. based on my calculations for an 8V dc out with 500 mA ccs, the value for R101= 6.6ohm, and R105= 830 ohms.

i haven't completed the regulator as of yet as im waiting for the parts.

thanks
For the CSS part 6R6 sounds about right if we use 4x 2.1V leds for the reference.
And for the shunt part, ~830R makes sense for 2x 1.9V leds and a jfet with 5mA idss.
The values are conditional anyway. We need to use trimmers to figure the actual values.

Oh and for a 12V input voltage, the heat should be around 2W on each IRF, so small heatsinks should be adequate
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Old 13th February 2013, 05:07 PM   #6705
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Click the image to open in full size.

Today I bought a Dexa clock with dedicated psu.
I will try it against the Tent with psu and Trichord 4 with nc psu.

A bit of an educated guess but trying to learn from fora is useless all you read is about people attacking eachother (even the well known clockdesigners) and all based on assuming what is a bad or a good clock...nobody actually heard them let alone bought them to compare

Anyway it comes my way and the best sounding (f&ck the specs) will stay in the Mini PiTbull
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Old 13th February 2013, 05:36 PM   #6706
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I certainly hope you will report the results here. Thanks for you efforts as there is a dearth of comparisons on these clocks and enquiring minds want to know.
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Old 13th February 2013, 07:16 PM   #6707
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Originally Posted by john dozier View Post
I certainly hope you will report the results here. Thanks for you efforts as there is a dearth of comparisons on these clocks and enquiring minds want to know.
+1
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Old 13th February 2013, 10:47 PM   #6708
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Hi,
This isn't Shiga anymore but this is not a point of our project.The ingredients are first quality so why not cook something better.
This is semi-analog device now because track skipping for example ,if automatically operated ,would last few minutes.So for shorten the seek time I help find track manually ,like analog turntable.I have optimized actuating speed so that the sled motor is constantly running and the lens is reading data effortlessly.Just like analog TT do.The whole CD project problem in my opinion is in the wrong designing in 80' because of ongoing consumerism world ideas ,fast ,fast ,fast.They forgotten that the music must be enjoyed slowly most of the time except if you are not in the car or jogging. The sound can't be characterized nor as digital or analog.It is very similar to 24bit computer audio (HD tracks for example) reproduced on Linux system and first class converter and what is most important you listen to the music as an analog LP instead to constantly skip from track to track with cell phone as my friends with such Linux systems do.I didn't have the chance to listen to even one of many song that we heard from beginning till the end since there is always huge music collection that attempt the user to listen whole quantity in one breath since music software is immaterial ,all in the hard drive chosen instantly by cell phone in the pocket.This is silicon thread driven system.Motor pulley 0,3mm in diameter is driving two video heads.On the second video head there is a needle 0,15mm ''thick'' which winch thread ,connected to disc placed over fixed lens which is damped with paraffin to kill unwanted energy which is produced by focusing.The disc is floating on air bearing and motor is paraffin treated too.The sled motor is decoupled from transport chassis by carbon stick tip.The whole transport is hooked on three springs.The transport is quiet as analog turntable now.
There is no more digital signature evidence left ,no jitter ,you can't tell if it is analog or digital ,it have best of both not the worst as can be heard on some ,so to say hi-end players with unnatural wannabe vinyl smoothness .
I can't offer you any drawings because it is project without the project ,only execution from imagination. Because of belt drive you have freedom to place motor anywhere and connect the laser to it restlessly without the need of micrometer precision but I will try to clarify the concept if somebody want to try something similar.Most important point is giving the laser all the time it needs to read the data without going back to pick what is missed in first attempt by optimally synchronizing sled motor and laser motion. If I am not mistaken this is the point of hard drive Linux systems ,ripping the music several times to pick up lost data during one of previous unsuccessful attempts.There is much more music on 16bit disc that can be extracted this way ,in real time ,not multiple 48x or 52x.
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Old 14th February 2013, 01:15 AM   #6709
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Anyone have any thoughts on what the right material would be for the standoffs for the turntable? 18-8 Stainless? Aluminum? Brass? Maybe Nylon would be a better choice as it would isolate the turntable from being directly grounded through the screws into the metal baseplate (in other words the grounding would be only through the wired ground point).
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Old 14th February 2013, 02:08 AM   #6710
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Hello all,

Posting a few pics of my Shigaclone, with thanks to all who contibuted to this great project.

Cheers, John.


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