Playstation as CD-player

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Originally posted by carawu
Moin,


the PS1 (5502) is rated @ 9VA at max!
Working on an audio Disc, it sucks 6VA from mains.
That said, transformed to the 7,6V or less...who put the 5A on the road???
LM317@1,5A is enough for this machine. Even at startup, large C after the reg for current peaks (10.000µF?) will be enough.

Carsten

nobody put the 5A on the road.
i just made a psu with lm 317 and 1000uf at the output and it didnt work.
then i went with lm 317 and 2n3055 which is capable of 5A and it works.

my psu (5502) is rated 17 watts.

[jives11]

I have some sticky bitumastic damping material, and it crosses my mind that the metal casework that the CD transport sits on might be able to be damped a bit.

Anyone have a view on wether this metal is a significant heatsink. I guess damping underneath might be better, assuming clearance. I notice Dommi that you damp everything with a grey compound .


Just a thought

[Dommi]

Originally posted by jives11
I have some sticky bitumastic damping material, and it crosses my mind that the metal casework that the CD transport sits on might be able to be damped a bit.

Anyone have a view on wether this metal is a significant heatsink. I guess damping underneath might be better, assuming clearance. I notice Dommi that you damp everything with a grey compound .


Just a thought

Good morning,
you are right, the gray compound is from car accessory, its a material for car bodys. Go into a car accessory shop and ask for. This is a verry good damping material to avoid resonances. I will post a picture with a blue led mounted. You can make some other modifications on the Laserunit. One is to remove the little black cap over the lense, and to paint the margin of the lense black. The other is to remove the complete black cap from transport. You have only to fix the copper cable in a way that it can move with the transport.

Regards Dommi

[Dommi]

Hy @ all,
can someone post a complete psu for 1002 please ? Is there someone who used different transformers for the different output voltages ?

Thanks

Dommi

[Mick_F]

Dommi, I am in the course of building a PSU. I will use two separate toroidals (10 V), one for the 7.6 V and one for the 3.6 V output. I will use two LM317 regulators in a regular circuit. The capacity will be someting like 1000uF before, 100uF and a snubber after the regulators.

Mick

[Dommi]

Originally posted by Mick_F
Dommi, I am in the course of building a PSU. I will use two separate toroidals (10 V), one for the 7.6 V and one for the 3.6 V output. I will use two LM317 regulators in a regular circuit. The capacity will be someting like 1000uF before, 100uF and a snubber after the regulators.

Mick

It sounds good, but what are toroidals and a snubber ?
I'm going to look for the parts for a tube stage.

Dommi

[jives11]

Originally posted by Dommi


Good morning,
you are right, the gray compound is from car accessory, its a material for car bodys. Go into a car accessory shop and ask for. This is a verry good damping material to avoid resonances. I will post a picture with a blue led mounted. You can make some other modifications on the Laserunit. One is to remove the little black cap over the lense, and to paint the margin of the lense black. The other is to remove the complete black cap from transport. You have only to fix the copper cable in a way that it can move with the transport.

Regards Dommi

Thanks Dommi,

What is the reason for the blue LED ?

I assume i't not like the Car or PC case modders ("pimp my playstation")

I noticed that the transport is supported in 3 rubber tubes, but on one side this floating is damped by a plastic tab which rubs against a small rubber pad attached to the metal subchasis. I guess removing the tab and the rubber pad will allow the transport to 'float' better ?

[Mick_F]

Originally posted by Dommi



It sounds good, but what are toroidals and a snubber ?
I'm going to look for the parts for a tube stage.

Dommi

Toroidals are "Ringkerntrafos".

Snubbers are serial RC networks (like a Zobel) to decrease the ESR of the power supply. Have a look at this page for my implementation of CarlosFMs famous PSU. The snubber is the RC network just before the output.

Mick

[Mick_F]

Originally posted by jives11


I noticed that the transport is supported in 3 rubber tubes, but on one side this floating is damped by a plastic tab which rubs against a small rubber pad attached to the metal subchasis. I guess removing the tab and the rubber pad will allow the transport to 'float' better ?

I generally recommend to remove the small rubber pad glued on the metal internal cover of the PS1 indeed!

Mick

[pieroh]

Originally posted by Dommi



It sounds good, but what are toroidals and a snubber ?
I'm going to look for the parts for a tube stage.

Dommi

Hi Dommi,
if you use a tube output stage you could use the heater windings at the transformer. The 6,3V to build a regulated supply for the 3,6V and the 12,6V-AC for the 7,6V supply.
Peter