SL-1200 outboard power supply.

[doom2112]

I have found this from China on EBAY.

http://www.ebay.co.uk/itm/131585252822?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

This is an ultra low noise regulated power supply according to them it is superior to normal LM 317 LT1086 and so on that sound hifi and Kabusa uses and many DIY use.
They make whatever voltage you need,in this case for the SL-1200 21-22V the technics can run on 18-25V so there is no problem with 24 V as well but to be safe just say you want 21V.
It connects just like any ather outboard power supply from OK suppliers.21V+ ti J3 and minus to ground post on motherboard.
Run it to the on off switch so you can turn it on and off woth the regular on off switch.
I have nothing to do with this firm i just wated to give you a very good product works perfect.

80£ free shipping in good looking box and perfect power,normally it goes through the customs whe shipped free at least in sweden.

[Spectral Morn]

I have found this from China on EBAY.

http://www.ebay.co.uk/itm/131585252822?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

This is an ultra low noise regulated power supply according to them it is superior to normal LM 317 LT1086 and so on that sound hifi and Kabusa uses and many DIY use.
They make whatever voltage you need,in this case for the SL-1200 21-22V the technics can run on 18-25V so there is no problem with 24 V as well but to be safe just say you want 21V.
It connects just like any ather outboard power supply from OK suppliers.21V+ ti J3 and minus to ground post on motherboard.
Run it to the on off switch so you can turn it on and off woth the regular on off switch.
I have nothing to do with this firm i just wated to give you a very good product works perfect.

80£ free shipping in good looking box and perfect power,normally it goes through the customs whe shipped free at least in sweden.

PSUs for the Technics make a big difference and the varying types, affect the presentation. I would contact Paul Hynes for his entry level one, or look at the Long Dog Audio one, or Origin Live's. Yes they are dearer but you get what you pay for.

Regards Neil

[CageyH]

Customer service is another bonus from buying from the above suppliers.
My PSU developed a fault, and was fixed very quickly. I doubt you would get that with a Chinese supplied PSU.

[Spectral Morn]

Customer service is another bonus from buying from the above suppliers.
My PSU developed a fault, and was fixed very quickly. I doubt you would get that with a Chinese supplied PSU.

+ 1





Regards Neil

[doom2112]

Well if their power supply is better made with better stuff inside and can be had fro 80£ i dont think it will be aproblem i have talke to them an i guess you can send it back for 15£ an d get it fixed if something is faulty and they test it before sending.
The ones made in UK are just ordinary LM317 and ordinary components and they charge you 3-400£ for them.
It is just like IFI Audio that state that their Ipower is a super quiet power supply it is nothing more than a wall plugs from china i have tested and chrushed one inside its no more than some shitty componenets and they charge 10 times the china power supply.I have regulated power supplyes with LT1086 that are much better than the wall plugs that comes with hifi gear. and cost about 40£ from china free hipping in good looking anclosures with digital voltage reading.
Most of the times they bullshit you and charge you 10 times mera than they should.
Then i can agree to having the suppliers close is a good thing.

But if you dont want to have it just dont buy it i wanted to give you all a better power supply to a nice price ,what is there to loose.
Much better than trying to make something of your own.

[lurcher]

The ones made in UK are just ordinary LM317 and ordinary components

Well, they are probably ordinary components, no magic dust, but they are certainly not all LM317's

[Spectral Morn]

Well if their power supply is better made with better stuff inside and can be had fro 80£ i dont think it will be aproblem i have talke to them an i guess you can send it back for 15£ an d get it fixed if something is faulty and they test it before sending.
The ones made in UK are just ordinary LM317 and ordinary components and they charge you 3-400£ for them.
It is just like IFI Audio that state that their Ipower is a super quiet power supply it is nothing more than a wall plugs from china i have tested and chrushed one inside its no more than some shitty componenets and they charge 10 times the china power supply.I have regulated power supplyes with LT1086 that are much better than the wall plugs that comes with hifi gear. and cost about 40£ from china free hipping in good looking anclosures with digital voltage reading.
Most of the times they bullshit you and charge you 10 times mera than they should.
Then i can agree to having the suppliers close is a good thing.

But if you dont want to have it just dont buy it i wanted to give you all a better power supply to a nice price ,what is there to loose.
Much better than trying to make something of your own.

No worries Per, you pays your money and makes your choice.


Regards Neil

[Arkless Electronics]

I'll just do the "me too" bit and add that I can also make any power supply for any application to order...

[doom2112]

I'll just do the "me too" bit and add that I can also make any power supply for any application to order...

Well i know it works perfect so you do as you like.

There are people that cant make their own supply so this will be good for them.
Dont know what you are afraid of.

Mabye the well respected UK firms are afraid of someone making something better for less money.
I dont know.
i have looked at photos if the time step and whatever they claim it´s just an ordinary LM317 circuit mabye som more
resistors here and there but nothing fancy to it.

Have a good day and maby someone will be glad that i posted this and will buy this ULTRA LOW NOISE power supply.

[lurcher]

Well i know it works perfect so you do as you like.

There are people that cant make their own supply so this will be good for them.
Dont know what you are afraid of.

Mabye the well respected UK firms are afraid of someone making something better for less money.
I dont know.
i have looked at photos if the time step and whatever they claim it´s just an ordinary LM317 circuit mabye som more
resistors here and there but nothing fancy to it.

Have a good day and maby someone will be glad that i posted this and will buy this ULTRA LOW NOISE power supply.

Yep, but there is more than just Timestep when you say "all". Just saying.

[RobbieGong]

Well i know it works perfect so you do as you like.

There are people that cant make their own supply so this will be good for them.
Dont know what you are afraid of.

Mabye the well respected UK firms are afraid of someone making something better for less money.
I dont know.
i have looked at photos if the time step and whatever they claim it´s just an ordinary LM317 circuit mabye som more
resistors here and there but nothing fancy to it.

Have a good day and maby someone will be glad that i posted this and will buy this ULTRA LOW NOISE power supply.

Thanks for the suggestion Per it's good to have options \ choice for sure. You'll find untold posts on the Technics external psu here. £80 does seem mighty cheap but as I say it's an option indeed for someone who wants to try without big outlay.

[struth]

Yes a very good option for little money relatively speaking. With an adaptor would work with a RPI as well

[Spectral Morn]

Dare I say, there is also the ethics issue, re buying from China - just saying. I'd rather buy British or American, European, Japanese or Korean before I would buy there.



Regards Neil

[rubber duck]

And what might be the ethics or objections to buying from China that don't apply to other countries?

[rubber duck]

Thanks for the suggestion Per it's good to have options \ choice for sure. You'll find untold posts on the Technics external psu here. £80 does seem mighty cheap but as I say it's an option indeed for someone who wants to try without big outlay.

+1

[dmckean]

I actually use that exact Made in China power supply to power my recently built DIY phono stage. I bought it because it was cheaper than building something like it myself. It's overkill for my phono stage, I would try it with my Technics but mine is the wrong voltage for that.

There's been a recent trend of Chinese taking popular DIY circuits off DIY boards and selling them on Ebay. These Ear 834p kits really intrigue me: http://www.ebay.com/itm/-/252085579102?

[Arkless Electronics]

Well i know it works perfect so you do as you like.

There are people that cant make their own supply so this will be good for them.
Dont know what you are afraid of.

Mabye the well respected UK firms are afraid of someone making something better for less money.
I dont know.
i have looked at photos if the time step and whatever they claim it´s just an ordinary LM317 circuit mabye som more
resistors here and there but nothing fancy to it.

Have a good day and maby someone will be glad that i posted this and will buy this ULTRA LOW NOISE power supply.

What a strange reply.... maybe an "English not first language" thing....

Theres nothing wrong with 3 terminal regulators when used for applications they are well suited for.... yet another old wives tale about electronics put about by people who probably know nowt about electronics ;)

[CageyH]

What a strange reply.... maybe an "English not first language" thing....

Theres nothing wrong with 3 terminal regulators when used for applications they are well suited for.... yet another old wives tale about electronics put about by people who probably know nowt about electronics ;)

Being called Per and coming from Sweden, that is highly likely.
For someone who's mother tongue is not English, I thought he did really well.

If my post original came across negative, then I did not mean it that way. It's just you need to be careful buying from China due to different regulations applying there.

[Arkless Electronics]

Being called Per and coming from Sweden, that is highly likely.
For someone who's mother tongue is not English, I thought he did really well.

If my post original came across negative, then I did not mean it that way. It's just you need to be careful buying from China due to different regulations applying there.

Well yes indeed! It was the "well you do what you like" and "don't know what you are afraid of" bits that obviously made me go :scratch:

I don't make a "stock" power supply (at the moment anyway) but was adding my name to the list of people who can supply high quality linear PSU's... in as much as I can make one-offs, to order, for virtually any application, including this one. Want a regulated 450V supply for a valve amp? 200V for a valve pre-amp? + and - 15V for op amp based equipment? etc etc I can probably make one.

[Spectral Morn]

And what might be the ethics or objections to buying from China that don't apply to other countries?

Do I really have to provide an answer ?

Look into China's lack of human rights, business practice, etc.


Regards Neil

[Spectral Morn]

I actually use that exact Made in China power supply to power my recently built DIY phono stage. I bought it because it was cheaper than building something like it myself. It's overkill for my phono stage, I would try it with my Technics but mine is the wrong voltage for that.

There's been a recent trend of Chinese taking popular DIY circuits off DIY boards and selling them on Ebay. These Ear 834p kits really intrigue me: http://www.ebay.com/itm/-/252085579102?

Possible example of intellectual theft if the designs are patented to Tim de P


Regards Neil

[EricS]

Alternatively, you can build your own power supply for the SL-1200. I copied a few designs I've found around the web and the results turned out pretty nicely.

I removed the stock transformer and the associated PCB. The power supply pcb got tossed and I moved the transformer to an outboard box. I created a CRCRC filter with a set of four diodes. The caps are 10,000uF and I used 5R 3W resistors between the caps. I then used a power jack on the outside of the chassis that connects to a 5-foot power umbilical. I drilled out the metal plate in the base of the turn table so it would accept a similar power jack.

I then built two Tracking Preregulators
15538

Values are as follows:

R1 = 150R
R3 = 120R
R4 = seven 3.0v LEDs for 21v ref
Purple R = 10R
C1 = 0.1uF film
C2 = 0.1uF film
Input Cap = 100uF 63v (had on hand)
Output Cap (not in image) = 470uF (also had on hand)

The wiring is a bit hard to see, so here is an image of the front and back of the board.
15540
15539

Too bad I don't have any equipment to measure how it actually performs relative to a "normal" regulator. The perf board measures 12x12 if you count holes. I put the regulators in row 3 to reduce the height of the board once I attach the regulators to the copper bar.

I'm hitting an image upload limit, so I'll end here and create another post to continue...

[EricS]

Oops, looks like I can't remove an image I uploaded above... oh well..

I built two tracking preregulators and tested the voltage to make sure they were delivering the specified 21v. Seven 3.0v LEDs served as the voltage reference for the regulator. Do yourself a favor and get low output LEDs. These are blindingly bright and make my turntable glow like something from outer space!
15543

I then depopulated the circuit board for the turn table. Remove the voltage regulator that is wired to the board as well.
15544

Then, turn the board over and cut the big trace to separate motor control from motor drive. Both function on 21v.
15545

Then, I cut a test-fit a 1/4" copper bar to act as a heat sink for the regulators. I had to round the edges a little and then drilled/tapped holes for the regulators.
15546

The next step is to wire it all together. I drilled a few holes through the PCB to apply power to the right places to restore the 21v supply to both the motor control and the motor drive circuits.
15547

Then, just close everything up and enjoy!

All together, this cost me about $50. I purchased a few large caps, some power resistors, jacks for the wire, 4-conductor wire for the power umbilical, some military grade high precision voltage regulators, and a handfull of LEDs. Everything else was already in my parts box.

All of the AC stays out of the turn table. The motor control and motor supply circuits are now isolated from one another. Each regulator has it's own run back to the cap bank in the outboard power supply, and the regulators are located in close proximity to the actual circuit.

[Andrei]

Very impressive Eric. Be sure to let us know how it sounds when you are done.
PS Nice green lighting too!

[doom2112]

As you all understand i´m from sweden and i hope that i haven´t offended someone, my only intention was to provide a well built power supply that probably are superior to the ones you can make yourself.
And to Neil and Mr Arkless,why don´t you buy one and try it out it might be better than you think and the ones you can make.
I will not respond to this thread anymore ,but now you know what i wanted from the beginning.
It is very good and the Chinese gentleman i tailk to assured me that it is superior to the normal 3 terminal regulators.

And speaking of china most companys from EU makes their stuff in China and many are sold as OEM but it is the same product just made at a different time at the same line,so for me buying from China or hong kong is not a problem since our goverments and companies does it all the time.

Since this is not my natural language it might come out wrong in text but it is way better than you folks writing to me in Swedish.He He,just kidding.

Have a good time you all.I´ll be back when i have found something else for you to sink your teeth in.

[Spectral Morn]

Hi Per

I am well aware that many companies use stuff bought from, or made for them in China. Increasingly I have serious reservations about that and if possible I will avoid Chinese made stuff but can't always. What I personally won't do is buy direct from China.

There was no issue with your words, your English is good, so you didn't come across badly. I am sorry if I did, my issue is with China not you.

[rubber duck]

Do I really have to provide an answer ?

Look into China's lack of human rights, business practice, etc.

The usual list then. But let's prod a little deeper. Should Chinese businesses (and workers) be penalised for the government's policies, especially when they don't necessarily have a say? As for business practice, I am assuming intellectual property rights and that is fair enough. But to put this into historical perspective, China is behaving no differently from Japan and Western countries at similar stages of their development process, i.e. when national income levels were comparable. In fact, we don't have to delve too far into history to see European countries disregarding intellectual property rights.

[struth]

The spacecraft has apparently been taken over "conquered" if you will by a master race of giant space ants. It's difficult to tell from this vantage point whether they will consume the captive earth men or merely enslave them. One thing is for certain. There is no stopping them; the ants will soon be here. And I for one welcome our new insect overlords. I'd like to remind them that as a trusted TV personality, I could be helpful in rounding up others to toil in their underground sugar caves.

[EricS]

Thanks, Andrei. I am not really sure how to best describe the changes. A fair amount of my listening is rather casual, I often listen to music from CDs or my satellite receiver while sitting on the couch doing some work. Over the past few months I've been spending more time with LPs. What I have been noticing is that each little tweak to the turn table increases the apparent differences between what is satellite/CD and what comes from LPs. The fun part is that I have a fair amount of music on both LP and CD, so it allows easy comparison. I don't know that I can speak to the whole "rhythm and pace" thing. Three descriptions that come to mind first are that music from LPs seems more "startling," be more "full," and contain greater levels of "detail" than that from other sources. For startling, the contrast between instruments and vocals seems to take me more by surprise than they do from other sources. Don't know if you equate this to "attack" of instruments or not, but the effect is clearly interesting. As for "full," the sound to me is just more rich, more present, more three-dimensional - almost as if the sound takes up more space in the room than ever before. And then there is just more "detail" that is missing from many of my CDs. This is most obvious in the mid-range and with treble (which I've now had to turn down a few dB from where I used to keep it). I know these aren't necessarily audiophile approved adjectives, but I find myself increasingly enjoying my turn table and increasingly disliking the sound of music from other sources.

The three changes I've made so far include the outboard power supply (a few months ago), an Oyaide mat and weight (a few weeks ago), and now a new bearing (last night). The impact of each is clearly discernible, though a bit subtle. All three together, though, make a more striking difference. The most obvious explanation to me is removal of various physical sources of noise. Removing the transformer gets rid of physical vibration - I haven't yet found a transformer that doesn't buzz, hum, or vibrate at some level. A mat and weight add a few kg of mass for increased inertia/stability. A new bearing provides a dramatic reduction in friction/drag. Next up is a tonearm rewire and RCA cable replacement - the stock wires measures close to 400pF which seems high to me.

[allthingsanalogue]

That ebay psu looks really nice but my main worry is the amount of fake components that seem to come China, mainly caps and transistors. Ebay is awash with fake capacitors and transistors. I suppose one could buy one and then change the suspect components relatively cheaply with genuine components.

[Andrei]

The three changes I've made so far include the outboard power supply (a few months ago), an Oyaide mat and weight (a few weeks ago), and now a new bearing (last night). The impact of each is clearly discernible, though a bit subtle. All three together, though, make a more striking difference. The most obvious explanation to me is removal of various physical sources of noise. Removing the transformer gets rid of physical vibration - I haven't yet found a transformer that doesn't buzz, hum, or vibrate at some level. A mat and weight add a few kg of mass for increased inertia/stability. A new bearing provides a dramatic reduction in friction/drag. Next up is a tonearm rewire and RCA cable replacement - the stock wires measures close to 400pF which seems high to me.
I think the various improvements add to each other, something like compound interest. The description you give makes perfect sense to me. Have you changed the feet? That was my single easiest improvement.

[EricS]

Nope, no feet yet, but my TT sits on a DIY "flexi" rack, that is made from about 2 full sheets of MDF and six 3/4" threaded rods. The rack and equipment on it probably top 200 lbs. It doesn't move very much. Feet will come at some point. Tone arm wire first. I've also been thinking of a nice wooden drop-in plinth from some exotic hardwood.

[CageyH]

I have also found that the Sound Damped Steel Isofeet work well under the feet.

[doom2112]

Since i do 99% of my vinyl listening with Headphones,vibrations from music and speakers in room is no issue for me.
the biggest improvement was when i took out the noisy transformer and bought the regulated power supply i mentioned in my earlier replys.
My three rebuilt technics sit on shelves on the wall with thick MDF bitumen sheets so nothing moves them exept if there is a big lorry or somthing going past my house but i´m in the basement so it´s no big issue.
The only thing that gets me annoyed these days is that i can hear the Record cutting machine start and stop i hear the rumble from it and the hum and other things that comes engraved in the vinyl records.

I can assure you that the technics even with original bearings are dead silent when listening in headphones.
So it is not the turntable thats the problem it is what comes with the records that has much higher rumble and hiss and other artifacts on it.

i can understand if silent socks for the techie can solve some problems when playing through speakers but in my case it doesnt matter.

The biggest improvent is the silent power supply.The bearing i have is one that i have made closed in oil with peek thrust plate.maybe it is better maybe not i have original in one and modified in two i can´t really hear the difference.

DEAD SILENT.I have run the needle on a glass platter and non engraved vinyl.cant hear a thing from the player.