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Numark PT-01 modding thread


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#21 Symatic

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Posted 12 July 2015 - 10:40 AM

http://scratchdj.de/...ad&threadid=917

German mod with new speaker and a exler fader

#22 Acts_One

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Posted 13 July 2015 - 07:34 PM

http://scratchdj.de/...ad&threadid=917

German mod with new speaker and a exler fader

 

thats fucking ill....

 

 

Now I want to mod my PT01.... maybe something simple like putting in a recess/hole in the area where I would put the Raidenfader so I it sits flush with the PT's body.  Oh shit... forgot about all the dam wires..... scratch that


Edited by Acts_One, 13 July 2015 - 07:34 PM.


#23 Symatic

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Posted 13 July 2015 - 09:04 PM

yeah on an old thread i showed how i installed a fader that was flush with the body. but a velcro'd on raiden / frisk fader is way more useful.....



#24 Focus

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Posted 21 July 2015 - 06:02 AM

 

Yeah like I said for now a crude ultrapitch can be got by replacing VR1 with a 2K resistor and that gives you about 20RPM. I'll try and figure out a better/more flexible way of doing ultrapitch.

I wonder if it would just be worth making a whole new mainboard that had all the features we need - decent phono preamp (the stock one sucks), decent speed/torque control (the stock one sucks), decent speaker amp (the stock one sucks), decent EQ (the stock one sucks), fader cut circuit (the stock one doesn't even exist).

 

Is the speed selector just a switch that switches between different value Resistors and the VR1 does the additional speed adjustment?

If so then maybe getting rid of the 78 rpm speed and converting that to use the 16 RPM...

Most of these portable turntables use the same parts from the same manufacturer, there was a Ebay seller selling all the parts minus the casing awhile back, I was looking into adding the parts to re-introduce my Scratch Practice Pads with Audio, definitely good for any of you do it yourselfers to make your own design.

I'm waiting for things to mature some more and I would really love a CNC Router too...

I think if you do those upgrades you mentioned and sold the upgrade kit they would sell good and help the Scratch Arts.

For On the Go Cuts the Audiophile quality might be overkill but the Speed/Torque Control and Fader Circuit would be excellent...

I'm going to try your Circuit with the 4066 when I get a chance if you don't mind, I do have a bag of them somewhere...I was never a fan of gutting those Vestax 06 / 05 and pros to make the Scratch boxes but it does work and they look good...

This Fader Cut Circuit would be a good kit to make by itself, that way it would be easy for anyone to add a Fader and make their own basic Scratch box or External Fader...

I never released an external fader because the High End Faders were expensive and the low end ones weren't quality enough, now here we are with these Frisk and Raiden Faders using those low end $2 Alpha/Noble faders and selling...blew my mind but I do like that it's Artists within the Scratch Arts releasing these...

Scratch Ninjas just want to Scratch and it's the only options right now and that's why they are selling...It's not the faders it's the un-tethering but just wait another month or two when the faders start to get staticky and bleeding and you'll see the importance of these Fader Cut Circuits...There will be riots :-)

With a Fader Cut Circuit VCA or Analog Switch...A battery powered External Fader can be made...That's what the Photomos was for and to add Contact-less Fader to a One Direction Portable Turntable...It's all free territory so anyone one of you readers can get to work on some of this ish too...


Would you mind sharing the PCB layout? Are you the Rasteri that's my facebook friend? I have some stuff I can share with you too...
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#25 Focus

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Posted 21 July 2015 - 06:52 AM

 



Adding a Variable Potetiometer would be cool for the Ultra Pitch Adjustment...This gives room to make some Ultra Pitched 7" Records...

 
hmmmmm, funny you should say that.....
 

Well, I predicted it too...:-)....

Let me tell you a story...In one of my books I have a list of different Scratch / Breaks Records that I wanted to either try to get licensed or at least motivate the Artists into releasing them on a 7" Inch Format to kick start this ish back in the late 90's...One of those records on the list was "Super Duck Breaks"...
Licensing a Scratch Record" Who ever heard of such a thing :-)...

My label partner at the time called StonesThrow /Peanut Butter Wolf and asked to license Super Duck Breaks..Peanut Butter said he would talk it out with Babu to see if it was possible...The answer came back and it was a NO :-)...Next thing you know they dropped a Super Duper Duck Breaks 7" inch teaser and Stones Throw has been dropping 7" inch records ever since :-) Check the time line on their releases...

Let me tell you another story, at NAMM I was giving away "Precision Incisions" my first 7 inch Scratch Record and Serato loved the idea...Next thing you know, the next NAMM Serato 7" Inch Limited Records being given out at the show...I hear it's a collectors item now...:-)

So in my note book there is a list of Break Records I wanted to license for 7 Inch Releases and it's pretty interesting...

The idea was to condense them by using the most recognizable Beats and Sentences, end result would be 2 things....1. You have a Fresh 7 Inch Record and 2. The Scratch Training Part....You could go from 7 Inch to 12 inch record which already existed...Here you get into muscle memory ish...

It would be coo if some of you went back check some of my sentences and sounds...All the Ultra Pitching is there and Reverse Sounds and it's all in my notes too...for the time most of it was too experimental and overlooked...and this is before turntables had a 50% pitch range...and come to think of it.At the time of my first 7 Inch,There were No Vestax or Numark Portable Turntables...check the timelines..

Anyhow...I was going to message you because my game plan is to release "Precision Incisions" 2.5 or 2.6 :-) but you kinda beat me to the punch with your center label and alignment waveforms...
I was going to do that, with some artwork or markings but on the underside of the Record itself...
Part of the game plan is to press a Clear 7 Inch Vinyl to be able to do some Custom Artwork...
There are more features, since I gotta make it extra special, it will be my first release since 2001 :-)
The point is that If you're dropping a 7 Inch record soon, I'd like to convince you to press some clear Vinyl so we can Frankenstein that sucker...I'm down to share some of the other secrets for the cause...
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#26 rasteri

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Posted 21 July 2015 - 09:21 AM

Is the speed selector just a switch that switches between different value Resistors and the VR1 does the additional speed adjustment?


The motor speed control circuit is a mess of incomprehensible resistor networks, but it all boils down to the diagram on page 4 of this datasheet - http://www.rcscompon...c1470ed3iuf.pdf- "RT" controls the torque and "RS" controls the speed.

RS is selected by the 33/45/78 switch, and RT is controlled by the pitch knob. So when you're varying the pitch you're actually varying the torque, dunno why it's set up like that. I'll rip it all out and experiment with different values of RT and RS when I get a chance - maybe we can get more torque at low speeds.

 

I'm going to try your Circuit with the 4066 when I get a chance if you don't mind, I do have a bag of them somewhere...I was never a fan of gutting those Vestax 06 / 05 and pros to make the Scratch boxes but it does work and they look good...


Yeah man I'd love for other people to have a go at building this thing, hit me up if you have any problems with it. Here's an updated version of the schematic that should be a bit more flexible as it has input signal biasing (will work on devices other than the PT-01) :

nanofb2.png
 
 

This Fader Cut Circuit would be a good kit to make by itself, that way it would be easy for anyone to add a Fader and make their own basic Scratch box or External Fader...


Yeah man, will have a few of these made up and see if anyone wants to buy them.
If you wanted to put them as a standalone faderbox you'd probably want to add input and output buffering, which is simple enough but would have added another 6 opamps to the design (so at least another 2 chips).
 

Would you mind sharing the PCB layout? Are you the Rasteri that's my facebook friend? I have some stuff I can share with you too...


Yeah man that's me, hit me up on facebook. I'm nearly finished the PCB design, here's what I've got so far :
 
nanofbpcb.png
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#27 Symatic

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Posted 21 July 2015 - 11:27 AM


Well, I predicted it too...:-)....

Anyhow...I was going to message you because my game plan is to release "Precision Incisions" 2.5 or 2.6 :-) but you kinda beat me to the punch with your center label and alignment waveforms...
I was going to do that, with some artwork or markings but on the underside of the Record itself...
The point is that If you're dropping a 7 Inch record soon, I'd like to convince you to press some clear Vinyl so we can Frankenstein that sucker...I'm down to share some of the other secrets for the cause...



Yeah basically to do a clear vinyl or a pic disk vinyl or some sort of etching that would provide some sort of visual cueing system is the dream, but to do it on a pressed record is totally possible but expensive. Its about manually lining up your design with whats been already cut. And theres still a risk of the motion of the press affecting your carefully lined up stamper....
Its something i would love to do but will take time and money to perfect
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#28 Focus

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Posted 26 July 2015 - 05:46 AM

 

Well, I predicted it too...:-)....

Anyhow...I was going to message you because my game plan is to release "Precision Incisions" 2.5 or 2.6 :-) but you kinda beat me to the punch with your center label and alignment waveforms...
I was going to do that, with some artwork or markings but on the underside of the Record itself...
The point is that If you're dropping a 7 Inch record soon, I'd like to convince you to press some clear Vinyl so we can Frankenstein that sucker...I'm down to share some of the other secrets for the cause...



Yeah basically to do a clear vinyl or a pic disk vinyl or some sort of etching that would provide some sort of visual cueing system is the dream, but to do it on a pressed record is totally possible but expensive. Its about manually lining up your design with whats been already cut. And theres still a risk of the motion of the press affecting your carefully lined up stamper....
Its something i would love to do but will take time and money to perfect

 

 

Word, man excuse the 3 chapter post earlier...I over embellish a bit sometimes and it took away from this Turntable topic which I much preffer..:-)

 

Some of the pictures from my design books on facebook have drawings for a  Skipless and Heaphoneless record...

Headphoneless is pretty much self explanantory...

 

The obstacles I had for any of the abstract ideas was that the engineers are

more geared towards cutting sound for quality  and weren't open to doing or trying what I wanted...

 

...Lock Beats and Parallel Grooves and Record Playing Outwards are standard but some of the heavy duty ish would require finding a Mastering Engineer that was down to be experimental.

 

With that said, things have evolved now and I'm pretty sure they are more open to try different things...

I worked out a couple of methods to align the sounds back in the early 2000's and since then

There have been some advances in Record Cutting that has made it even easyer...

 

The Clear Records are for artwork after the record is pressed to be able to custom designs...

Worst case secenerio it's a novelty with custom graphics on vinyl like slipmats, best case scenerio Scratch Braniacs

run with it and make into something greater...

 

The alignment is just one small component of the full master plan..If you do press some 7 inch records, it be cool if you drop a few Clear

copies to experiment with, heck if everyone pressing 7 inch records did some Clear copies that ish would be ideal..

I have one in the works but don't think it will be out before all these that are already in the pipeline...Anywho, continued succes with what you

are doing,...



#29 Focus

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Posted 26 July 2015 - 06:08 AM

 

Is the speed selector just a switch that switches between different value Resistors and the VR1 does the additional speed adjustment?


The motor speed control circuit is a mess of incomprehensible resistor networks, but it all boils down to the diagram on page 4 of this datasheet - http://www.rcscompon...c1470ed3iuf.pdf- "RT" controls the torque and "RS" controls the speed.

RS is selected by the 33/45/78 switch, and RT is controlled by the pitch knob. So when you're varying the pitch you're actually varying the torque, dunno why it's set up like that. I'll rip it all out and experiment with different values of RT and RS when I get a chance - maybe we can get more torque at low speeds.

 

I'm going to try your Circuit with the 4066 when I get a chance if you don't mind, I do have a bag of them somewhere...I was never a fan of gutting those Vestax 06 / 05 and pros to make the Scratch boxes but it does work and they look good...


Yeah man I'd love for other people to have a go at building this thing, hit me up if you have any problems with it. Here's an updated version of the schematic that should be a bit more flexible as it has input signal biasing (will work on devices other than the PT-01) :

nanofb2.png
 
 

This Fader Cut Circuit would be a good kit to make by itself, that way it would be easy for anyone to add a Fader and make their own basic Scratch box or External Fader...


Yeah man, will have a few of these made up and see if anyone wants to buy them.
If you wanted to put them as a standalone faderbox you'd probably want to add input and output buffering, which is simple enough but would have added another 6 opamps to the design (so at least another 2 chips).
 

Would you mind sharing the PCB layout? Are you the Rasteri that's my facebook friend? I have some stuff I can share with you too...


Yeah man that's me, hit me up on facebook. I'm nearly finished the PCB design, here's what I've got so far :
 
nanofbpcb.png

 

 

 

Super fresh, I'll hit you up on Facebook soon too....Making some kits so Scratch mofos can use their High Quality Faders is needed asap.

 

Some other plans I had was to make Kits to add Individual Outputs to the 05 Pros or any other mixer that might need it...That's from my SA-8 Signature Mixer and now added to the TRX Mixer but, it's just adding Op-Apm kits you know...Same with FX Sends and Returns...a few other kits in mind too...

 

I don't want to go into too much of the details but overall I think the new eco system is to make some kits aswell as have it be open source and those with skill can build of that and those that much rather pay and support Scratch Arts will do so...I saw the Scratch Fader Box you made too haha sick...

 

I noticed you were asking about making it purdier, I have some simple ways you can make your own faceplates, those freakin skins/printed vinyl stickers effed up the game plan so I never released these print your own faceplate kits but, you can definitely make them without any major tools...I'll give you that info too...



#30 Symatic

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Posted 26 July 2015 - 12:40 PM

When i have my own record lathe i'll hopefully be up for experimenting... But i get why engineers dont wanna go too crazy. A cutting head is a rate and valuable piece of kit, very expensive and tine consuming to repair, and if your business is using one of those fuckers, you dont wanna risk breaking it becaus dj cutsalot wants to make crazy seethrough skipless halfspeed records :)
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#31 rasteri

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Posted 28 July 2015 - 08:38 AM

For anyone who wants to have a go at replacing the tonearm I've made some notes.

I think underhung straight tonearms (like the STR8-150 and Vestax PDX 2000 tonearms) are the way to go because they'll be more skip resistant and the manufacturing and maths is easier.

You may have to shorten the tonearm tube slightly because the pivot point in a PT-01 is closer to the centre of the record. The maths you need to work this out are in page 765 of http://www.tubebooks.../Books/RDH4.pdf- basically you have to solve the underhang equation for L instead of Dopt. Clue : L = (D - Dopt)

(or you could just say fuck it and live with the slightly misaligned tracking, I bet it'd make no difference).

You can get STR8-150 tonearm assemblies from sales@focusrite.com for £72.50 inc VAT + £5.00 shipping. IMO we're better leaving the dwindling stock of Technics and Vestax tonearms to people who want to repair actual turntables.
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#32 rasteri

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Posted 28 July 2015 - 09:13 AM

Wolfram Alpha reckon the maths goes like this :

wolfalph.png
 
So it's :
L = 0.5 * ( sqrt( 4C + D2 ) + D )
 
That's where :
L = The length the tonearm needs to be, from the pivot point to the needle
D = The distance from the tonearm pivot to the spindle
C = The record radius constant, (3.04 for 10 inch records, 3.18 for 12 inch records, see the Radiotron handbook)

C can be optimised for 7" records by measuring the outside and inside radius of a typical 7" record's grooves and plugging the values into this :

C = (R12 * R22) / (R12 + R22)

Where :
R1 = Outside radius of record groove
R2 = Inside radius of record groove

Now all someone needs to do is measure the distance from the PT-01's pivot point to the spindle (i.e. "D") and the inner/outer radius of a few 7" records (i.e. "R1"/"R2") and we can calculate the exact length a straight tonearm needs to be.
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#33 Symatic

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Posted 28 July 2015 - 10:39 AM

Tone arm made out of a carbon fiber Arrow Shaft, and a hard drive motor / bearing assembly.

 

no evidence of how it sounds.... but i've seen people talking about hard drive components for other DIY audio projects, it seems theyre pretty well built in terms of accuracy / durability....

 


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#34 rasteri

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Posted 28 July 2015 - 10:51 AM

That does look sexy. I really love the idea of using a carbon fibre arrow shaft as a tonearm tube :)

No way I can be arsed building one though. Not as long as SuperOEM parts are available.

#35 kut_class

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Posted 30 July 2015 - 06:02 AM

I think the center label sticker idea cud def be evolved as its a little small to read, I'm not sure the clear record method is that great as a next evolution... I see some cons.. It Wud push the price up a lot having to buy a pair of slipmats per record. It might suck a bit for the battlers that don't wanna adjust slipmats but might want to see the wavs. U'd need to fix the slipmat semi permanently to the record some how in an even way.. lots of people suggested the picture disc / pre attached central label thing but as sy said it's a pipe dream to manufacture to that accuracy in a viable way. Using stickers does allow for flexibility in your stickering method (12oclock / at the needle or others). My thoughts were to make the wavs colour coded so u can pick them out easier and maybe glow in the dark for dim conditions. Both tiny changes that suddenly double the cost tho :-(
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£100? I see you're gunning for the 'friends and family discount'... Like a Paris brothel, never underestimate the price of French Aaaahhhs.

 


#36 kut_class

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Posted 30 July 2015 - 06:07 AM

Saying that , there's no harm in making the records clear and maybe providing a file for people to print their own paper slipmats and figure out the fixing method themseleves..hmmm

£100? I see you're gunning for the 'friends and family discount'... Like a Paris brothel, never underestimate the price of French Aaaahhhs.

 


#37 rasteri

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Posted 30 July 2015 - 08:42 AM

12inchskins do a modified clear serato vinyl with custom print, might be worth investigating how that's done - http://www.12inchski...rs-pair-custom/

#38 Symatic

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Posted 30 July 2015 - 11:44 AM

I think the center label sticker idea cud def be evolved as its a little small to read, I'm not sure the clear record method is that great as a next evolution... I see some cons.. It Wud push the price up a lot having to buy a pair of slipmats per record. It might suck a bit for the battlers that don't wanna adjust slipmats but might want to see the wavs. U'd need to fix the slipmat semi permanently to the record some how in an even way.. lots of people suggested the picture disc / pre attached central label thing but as sy said it's a pipe dream to manufacture to that accuracy in a viable way. Using stickers does allow for flexibility in your stickering method (12oclock / at the needle or others). My thoughts were to make the wavs colour coded so u can pick them out easier and maybe glow in the dark for dim conditions. Both tiny changes that suddenly double the cost tho :-(

 

i was thinking more of a scratch rec that was a pic disc - with the pic lined up with the sounds on the stamper, and then you'd needle drop according to the graphics rather than labels or grooves


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#39 rasteri

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Posted 30 July 2015 - 08:39 PM

I've been speaking to wax inspektor (the dude who did the mods Sym posted, real nice guy) and it he says he's tried to mod a M44-7 onto the PT-01 but it didn't work - he got very quiet distorted audio. Probably an impedance mismatch, I'll investigate.



#40 wax inspektor

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Posted 30 July 2015 - 11:36 PM

hey there - funny someone found my old pt01 mod... that was some real primitive but effective stuff back in 2013..
i soldered a crossfader right under the volume potentiometer which was giving me a 3mm curve though... let's say it had a special feel to it..

i been through lot's of different faders and since none of them were "controlled" by a VCA they we're giving noises due dirt and stuff real quickly... the best result i had been with a pro-x-fade... it still had that curve but i never had to clean it. i even tried an innofader pro but i was getting real annoying electric click noises... now that i dig through this thread i think i might have found THE solution:)

my old pt01 mod contained some more gimmicks like a 2 channel mixer with tiny 20mm faders, 2 new speakers+amp, an internal mp3-player for beats (2GB), cue function for the turntable channel, start/stop button, technics tonearm clamp and 2 remote buttons for a boss loopstation (stop+track selection) oh.... and even a cheeky needle light... now that i look into it - it is a mess lol
it's been dead for some month now but i wanna update to akku and bluetooth for line in also soonish....
dovehdejltd.jpg


since most people think they can't do such mod on their own i been working on passive fader boxes for the past 3months... guess ya'll know about the frisk and the newer raiden fader... they're cool without a doubt but tbh that stuff can be done way better... my shot on a scratchbox - i call em the waxcutter - contains a real fader that runs on rails - super smooth and stable - and it cuts on a non contact / magnet base... so you can adjust the lenght of the cut in - not the curve though that's a super sharp cut (on/off switch) which is giving some click noises though - sometimes more sometimes less... that's still a bugger to me but it's the same on the raiden and frisk - it's because of the passive circuitry...

+

7353zrpx98.jpg

pkvnpb4yqens.jpg

funny feature is the bluetooth line in / you can use it with a cable also though - it runs on  2x AAA's at the moment but akku (charging via usb) is set up already.. haven't found the right case yet...

i'm super happy to see that there is an active solution - can't wait to try that out - real curious how much space it takes...
giving such a box a batterie brings up so many cool opportunities - the real lag still is the turntable though...
a better needle is a must - i didn't succeed in putting a m44/7 to it - it's just like rasteri described....

oh and for the pitch mod - there is a neat trick right in the box.... just put the pitch switch BETWEEN 33 and 45 and you'll get a pitch  of sth around 20 rpm... works on the handytrax and the pt01.
i wonder why not hanging a potentiometer right onto the motor and give it a huge pitch wheel u could control with your thumb?

sorry for the mega post and the language also... i'm no native english speaker...
super happy i found this spot - super inspirational... totally dig the idea of teaching each other...

maaaad props to rasteri for that circuitry and PCB design - other's would be sitting on this like the last bit of pot in town.

 


Edited by wax inspektor, 31 July 2015 - 12:17 AM.

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