PSU for SL-1210 with pics

[leo]

Heres a few pics and details for a diy external psu for the Technics I knocked up, I decided to use the Paul Hynes PR3 based psu after the positive write ups from other Techie users and also after great results using his other regs in my dacs . I've only just finished it so not had chance to try it with the 1210 yet , according to Paul the PR3G3HD-21 for the Techie is capable
of prodigious transient current delivery so won't have any problems upon start up for the platter

I'll add a few details how to fit it later

Some of the used parts, I also tried to get prices etc

Hammond aluminum enclosure Maplin N85AL £10:79 http://www.maplin.co.uk/Module.aspx?ModuleNo=33690

DC socket , Bits of cable, heatshrink IEC socket etc can all be had from Maplin http://www.maplin.co.uk/Module.aspx?ModuleNo=1503

Paul Hynes PR3G3HD-21 module £120 http://www.paulhynesdesign.com/ For those that can't or don't want to diy , Paul can supply a stand alone psu called SR3-21 for £270 and DC3C high performance DC lead for £35

I already had the 2 x 18v 80vA transformer as a spare http://www.farnell.com/datasheets/74766.pdf suitable types can be had from Farnell , RS , ebay etc, required secondary voltage is 18v, 2 x 80vA is probably overkill





Paul Hynes PR3G3HD-21 for the Techie, I edited the pic and added a few details



Inside after the build, theres the option to add a power on led to the PR3 module, I may add one on later



Added a few details



Finished!

[twelvebears]

Pretty neat job Leo!!

[MartinT]

Nice one Leo. I was thinking of using the same series case from Maplin. Which size is yours?

I now have a superteddy circuit board ready to fire up and am waiting for an 18V 50VA tranny to arrive. Going to try mine both with the Techie (21V) and the Caiman (15V).

[leo]

Thanks guys.

Hi Martin,

The case is the largest Maplin sell, according to the spec its 160 x 103 x 43 mm

Let us know how you get on with the TR

Cheers,
Leo

[MartinT]

Thanks, case ordered.

How does the PSU sound with the Techie?

[leo]

Hi Martin,

Not had it running the Techie long but initial impression is bloody hell I wasn't honestly expecting much difference compared to say upgrading the dacs regs, infact the improvement its brought is very clear to my ears.
Its early days but so far I notice a thick veil has been removed, bass is tighter and quicker, high's are less sibilant , the sound has better flow.

Certainly a worth while upgrade imho

Cheers,
Leo

[The Vinyl Adventure]

What were you using before? Just the techie's own power?

[Dave Cawley]

Any good PSU will improve the Technics. Some more than others. And some in different ways.

The SL-1200 is now achieving even greater heights with Mike New's bearing and the up-coming heavy solid platter (have you sent it yet Mike?)

So in true audio tradition we will have our new HE PSU next week. This achieves an instantaneous 60A peak current delivery with absolutely no negative feedback at all.

Regards

Dave

[anthonyTD]

Hi Martin,

Not had it running the Techie long but initial impression is bloody hell I wasn't honestly expecting much difference compared to say upgrading the dacs regs, infact the improvement its brought is very clear to my ears.
Its early days but so far I notice a thick veil has been removed, bass is tighter and quicker, high's are less sibilant , the sound has better flow.

Certainly a worth while upgrade imho

Cheers,
Leo

looking good leo!
as dave [cawley] said the technics 1210 will respond positively when powered by a well designed outboard power supply as was demonstrated with the paul hynes design on marco's turntable at the recent scalford hall meeting.
good luck with it!
A...

[Marco]

Nice one, Leo - this is most interesting!

What I like is the huge (for the purpose) f*ck-off tranny used. I'm a great believer in over-specifying transformers in PSUs, no matter their application, as experience tells me, properly implemented, it always makes a significant (easily audible) sonic improvement, even if there appears no 'logical' explanation for it based on measurements.

Hi Dave,

Does the HE PSU use as big a transformer, and if not, why not?

The reason I ask is that the answer you give *could* have an impact on which new PSU I buy for use with the new platter - an HE PSU, a Paul Hynes, one of Leo's, or get Anthony to make me an 'extra-special, super-duper' bespoke one.....

Basically, I guess what I'm looking for is you to 'sell' me the benefits of the HE PSU, which you feel makes it a better product than those of your competitors.

More info such as "This achieves an instantaneous 60A peak current delivery with absolutely no negative feedback at all" would be good, along with a layman's explanation for why this is liable to improve performance. Perhaps Leo or Anthony could comment here, too?

A list of 'features and benefits' of the HE PSU, in the form of bullet points, over and above those of the standard Time Step PSU, would be ideal. I'd like to know where the improvements over the current model have been made, and for what purpose.

Cheers!

Marco.