http://datasheet.octopart.com/LM317T/NOPB-National-Semiconductor-datasheet-7275803.pdf
Page 9 Figure 3 is what I meant.
Also page 15 bottom right might be better is using an external reference? But I would put in the diodes and reference decoupling capacitor.
Dave
Page 9 Figure 3 is what I meant.
Also page 15 bottom right might be better is using an external reference? But I would put in the diodes and reference decoupling capacitor.
Dave
That was also my suggestion, and exactly what I did with my SP-10 suply- the caps can be quite a bit larger (100-220uF) which further reduces noise and impedance.
Huh, my dynamics seem to be intact.
See the definitive Erroll Dietz paper- note particularly Figure 4 and what happens to the output impedance below 100 Hz when that adjust cap is oversized (his data show 10uF vs 1000uF).
Dave, I believe this is the Dietz article SY is referencing. - http://electrooptical.net/www/sed/ErrolDietzRegulatorNoisePeaks.pdf
And this is the circuit you are suggesting -
That's what I'm thinking, with 220uF on the output.
And this is the circuit you are suggesting -
That's what I'm thinking, with 220uF on the output.
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The Chasss has been sent to be refinished, my brother-in-law owns an automotive paint and body shop, he is going to prep and paint it, I merely need to decide on a color. Somebody has suggested Autoair colors 4584, but it would clash with the plinth.
These photos were made to assist me in the reassembly of the turntable, but I thought you may want to see them as well -
Switch assembly
Edge connector
Motor bottom
Strobe assembly
Mechanical brake
Various stand-offs on chassis bottom
Parts removed from chassis
Bare chassis
These photos were made to assist me in the reassembly of the turntable, but I thought you may want to see them as well -
Switch assembly
Edge connector
Motor bottom
Strobe assembly
Mechanical brake
Various stand-offs on chassis bottom
Parts removed from chassis
Bare chassis
So you're sticking with the original color...?
What color have you decided on the plinth?
It's never too late to opt for a custom color and maybe do some color matching with the power supply chassis.
Are you going to leave the original chassis as is?
A lot of things could be done underside to strengthen-damp it.
The boards leave enough space for you to work on.
A crucial thing is to damp the area around the "thrust plate".
With a bit of metal CNC work the screw on ball supporting thust plate could become
a vibration sinking ballast weight of sorts.
I have tried it and works wonders.
What color have you decided on the plinth?
It's never too late to opt for a custom color and maybe do some color matching with the power supply chassis.
Are you going to leave the original chassis as is?
A lot of things could be done underside to strengthen-damp it.
The boards leave enough space for you to work on.
A crucial thing is to damp the area around the "thrust plate".
With a bit of metal CNC work the screw on ball supporting thust plate could become
a vibration sinking ballast weight of sorts.
I have tried it and works wonders.
Hi Tim
Would you ask him if there are/were any issues with the chassis. And like how he striped it, how it was flattened, what primer, etc ?
I would like to get some done here but I am nervous, as others have tried and found the material not to be very pure, very porous and difficult to get stuff to stick to.
Your brother-in-law is much more likely to do the job properly !
Let us know ?
Thanks
Dave
BTW, was this the colour ?
Would you ask him if there are/were any issues with the chassis. And like how he striped it, how it was flattened, what primer, etc ?
I would like to get some done here but I am nervous, as others have tried and found the material not to be very pure, very porous and difficult to get stuff to stick to.
Your brother-in-law is much more likely to do the job properly !
Let us know ?
Thanks
Dave
BTW, was this the colour ?
Soundofvoid-
Not sure yet, but probably original or black.
Reconstituted Ebony
Chassis will be refinished, but how will be left up to my brother in law.
Some damping will be added to the chassis, likely dynamat
No current plans on modifying the bearing well cap, but have looked into it.
Dave -
I will relay the refinishing technique once I hear from him.
Yes, that's the color.
Not sure yet, but probably original or black.
Reconstituted Ebony
Chassis will be refinished, but how will be left up to my brother in law.
Some damping will be added to the chassis, likely dynamat
No current plans on modifying the bearing well cap, but have looked into it.
Dave -
I will relay the refinishing technique once I hear from him.
Yes, that's the color.