New Technics SP10 motor controller specification - Page 30

Steerpike · 12th November 2009, 11:05 PM

A sexy circuit suitable for generating PWM drive, without a microprocessor. Either for analogue purists or testing purposes - very linear.

sp10page4.htm#pwmpulsetrain

And there's a missing capacitor in my diagram one-post-back. The anode of the red diode goes to ground via 0.2uF

Steerpike · 29th November 2009, 11:19 PM

I'm still here; I'm short of components for testing - no HEF4053! I'll be going into town to get bits to play with this week.

In the meantime I've been attending to my "ReVox Clone Amplifier" daydream, if anyone wants to see: ReVox Amplifier B24-something

Triophile · 30th November 2009, 12:03 AM

We're all still here too :-) Keep up the good work Steerpike - I'm seriously anticipating the final outcoming, and bolting it into my SP-10 Mk2 chassis!

Cheers, Jon.

rich121 · 29th December 2009, 07:04 AM

Hope everyone had a great Christmas weekend and enjoying the Winter that is upon us.
Curious, Steerpike, do you have any developments on the SP10 MKII controller/power project?
It has now been 1.5 years since Steerpike and I first posted to this thread...
I'm hoping, very much hoping, something will finally develop into an excellent, functional/with options and isolated, controller and power supply unit.

Looking forward to future posts... everyone Enjoy!

Rick

Steerpike · 29th December 2009, 02:42 PM

Quote:

Originally Posted by rich121

Curious, Steerpike, do you have any developments on the SP10 MKII controller/power project?
It has now been 1.5 years since Steerpike and I first posted to this thread...
I'm hoping, very much hoping, something will finally develop into an excellent, functional/with options and isolated, controller and power supply unit.

Oh certainly things are happening! One bug that has kept me from putting up exciting new info on the PLL part is that when I went to get ICs before Christmas, I asked for 4035s and they gave me 4053s ! So next week when they open again after the holidays, I will be getting the right chips!

Meantime I have been adjusting component values in the 'drive' stage according to actual measurements.

brianco · 29th December 2009, 03:17 PM

These things happen - especially close to holiday time!!!!

Good luck and a very joyful New Year,

Brian

rich121 · 29th December 2009, 09:34 PM

Quote:

Originally Posted by Steerpike

Oh certainly things are happening! One bug that has kept me from putting up exciting new info on the PLL part is that when I went to get ICs before Christmas, I asked for 4035s and they gave me 4053s ! So next week when they open again after the holidays, I will be getting the right chips!

Meantime I have been adjusting component values in the 'drive' stage according to actual measurements.

Glad to see things still going forward.

How do you feel about how the design is coming together?
I know it is alot of work, and I really do appreciate all that your doing, as everyone else here... if there is something I can somehow help with, just let me know, ok?

Again, thanks!

Rick

Steerpike · 30th December 2009, 09:46 PM

Quote:

Originally Posted by rich121

How do you feel about how the design is coming together?

So far I'm happy at how well it's working. All the test/prototype circuits have functioned as anticipated. That shouldn't be surprising, but often with stuff I'm experimenting with, I tend to rush it, and not think or calculate enough before going straight to harware. With all of you 'watching' though, I have to pay attention to the details on this one!

I think the circuit is rather an 'over-achiever' in some parts, when I look at the simplicity of some commercial designs. But for this project we don't have to concern ourselves with cutting a few dollars out of component costs. I don't like the prospect of having to go back and re-do a certain part because it doesn't perform - so I prefer to make each part work the best possible way that I know how, right from the start. (That's what audiophiles want anyway!)

rich121 · 30th December 2009, 09:51 PM

Well, you are doing a great job!

We are all very appreciative of all the effort and work you have put into this!

Rick

brianco · 31st December 2009, 12:19 AM

A few dollars will not hurt. You have given a few people a lot of hope as the TT is in my view one of the absolute best as far as its potential is concerned. I am having a slate plinth cut to take just the motor and an on/off switch plus a carbon (solid) armboard.....a sort of updated Kaneta approach.

12th November 2009, 11:05 PM	#291
Steerpike diyAudio Member Join Date: Jan 2006 Location: Johannesburg, South Africa	A sexy circuit suitable for generating PWM drive, without a microprocessor. Either for analogue purists or testing purposes - very linear. sp10page4.htm#pwmpulsetrain And there's a missing capacitor in my diagram one-post-back. The anode of the red diode goes to ground via 0.2uF __________________ Steerpike's Toybox

29th November 2009, 11:19 PM	#292
Steerpike diyAudio Member Join Date: Jan 2006 Location: Johannesburg, South Africa	I'm still here; I'm short of components for testing - no HEF4053! I'll be going into town to get bits to play with this week. In the meantime I've been attending to my "ReVox Clone Amplifier" daydream, if anyone wants to see: ReVox Amplifier B24-something __________________ Steerpike's Toybox

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30th November 2009, 12:03 AM	#293
Triophile diyAudio Member Join Date: Sep 2004 Location: London	We're all still here too :-) Keep up the good work Steerpike - I'm seriously anticipating the final outcoming, and bolting it into my SP-10 Mk2 chassis! Cheers, Jon.

29th December 2009, 07:04 AM	#294
rich121 diyAudio Member Join Date: Nov 2007	Hope everyone had a great Christmas weekend and enjoying the Winter that is upon us. Curious, Steerpike, do you have any developments on the SP10 MKII controller/power project? It has now been 1.5 years since Steerpike and I first posted to this thread... I'm hoping, very much hoping, something will finally develop into an excellent, functional/with options and isolated, controller and power supply unit. Looking forward to future posts... everyone Enjoy! Rick

29th December 2009, 03:17 PM	#296
brianco diyAudio Member Join Date: Aug 2005 Location: Scottish Borders - Kelso; on the famous Tweed River!	These things happen - especially close to holiday time!!!! Good luck and a very joyful New Year, Brian

30th December 2009, 09:51 PM	#299
rich121 diyAudio Member Join Date: Nov 2007	Well, you are doing a great job! We are all very appreciative of all the effort and work you have put into this! Rick

31st December 2009, 12:19 AM	#300
brianco diyAudio Member Join Date: Aug 2005 Location: Scottish Borders - Kelso; on the famous Tweed River!	A few dollars will not hurt. You have given a few people a lot of hope as the TT is in my view one of the absolute best as far as its potential is concerned. I am having a slate plinth cut to take just the motor and an on/off switch plus a carbon (solid) armboard.....a sort of updated Kaneta approach.

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