DIY power supply for Technics SL1200/1210

[Dave Cawley]

Hi Mr Frog

There are fundamental differences between the SP-10 and SL-1200, in fact there is actually no similarity at all. However with a new platter, a modified main bearing and new control electronics they could get close.

Putting the SL-1200 into a new plinth is a splendid DIY project, well done! Is this the first time?

I would suggest that you fully screen all the wires from the motor, I assume you are remote mounting the electronics too? There is a lot of hash that your cartridge could pick up from unshielded wires.

In my other life in Weather Satellites www.time-step.com I encourage DIY's and help them. They in return often provide the inspiration of wood and trees. You can see on www.SL-1200-MK2.com that I explain in great detail how I do things, this can make it easy for a DIY'er to copy, and I'm not against that.

In a few months I will release the motor dynamic mod for all to have for free.

But it must be remembered that some people struggle to solder a single joint, and that I need to pay my mortgage just like everyone else. And that works well!

Keep up the good work!

Regards

Dave

[jonners]

Very nice, frogspit. Put me down for one too - I look forward to seeing how it turns out.
The cueing light certainly works after a fashion, but I've never had much use for it myself. I agree with muffinman that it's very unlikely that it could affect the sound.

John

[Marco]

Dave,

There are fundamental differences between the SP-10 and SL-1200, in fact there is actually no similarity at all. However with a new platter, a modified main bearing and new control electronics they could get close.

I suspect that the SL-1200 shares more genes with the SP-10 than you may think. I'd be very surprised if when National Panasonic launched the first SL-1200 in its full 'audiophile guise' that the SP-10 wasn't in their thoughts when implementing the design.

Anyway, a fully-modifed SL-1210 (like mine, for example) certainly gets very, very close, sonically - no "could" about it!

You yourself said that the 1200/1210 got 95% of the way there... Based on what I've heard, I'm not sure that last 5% is terribly significant

Marco.

[jonners]

I encourage DIY's and help them.
In a few months I will release the motor dynamic mod for all to have for free.

What a gentleman you are Dave May you pay your mortgage and much more! I will certainly be buying stuff from you in the not too distant future.

John

[Sgt.Pepper]

In a few months I will release the motor dynamic mod for all to have for free.

Jolly decent of you Dave

[frogspit]

Thanks for the encouragement everyone-this seems like a great site. I'll be looking for more advice vis-a-vis the electronic stuff at some point-right now, I just want to finish the deck, and have the platter spin at the correct speed. There'll be plenty of time for me to fry resistors down the road.

Not my first project-below is my 'reference' VPI (I made everything you see that's wood), a Papst-motored, three-arm belt drive deck, a Rek-O-Cut idler that, so far, I've stripped and polished, and will drop into a high-mass plinth, and a G301 that will receive a plinth made from a material that should be interesting-or, perhaps, "interesting".

Dave, I appreciate the sometimes disparate realities of helping the diyers, and trying to make a living!. So, any help you give is not expected, but much appreciated. Frank Schroeder of the famous Schroeder tonearms likewise provides help to diy-ers attempting to copy his arms-another great guy. I'm not sure what that 'motor dynamic mod' is all about, but I'm looking forward to it.

Oh, and I'm under no illusion that the SL-12XX series are anywhere near the SP-10s in any way other then the published specs (and even there, the 10 MKIII is in a class by itself). I just wanted to try a DD deck, and have a little fun at the same time. So far-mission accomplished. At least the 'fun' part.

[fraser.]

I'm amazed that you would provide that information to be honest, and very pleased so a big thankyou to dave cawley!!

[jonners]

Fraser -

My offer of help was made to you personally via a PM, so I would prefer you to use that method if you want to communicate further about this, thanks.

John

[fraser.]

Whoops sorry mate, taken to PM..

[leo]

So nobody else tried a diy PSU yet?
I'm going to treat myself to one of these SL-1210's at some point, theres way too much fiddling for a diy bodger like me to resist
If a linear regulated psu is good enough you can try out a few variations, their p**s cheap and easy to knock up