Author Topic: parts for diy kajak12 clock  (Read 6228 times)

Offline kajak12

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still discovering the link between electronics and audio reproduction.so much to learn and so little time

Offline ozmillsy

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Re: parts for diy kajak12 clock
« Reply #1 on: September 27, 2010, 08:41:05 PM »
got 1 (on the way),  tick.

what's next?
It's all about the music,, not the equipment.

Offline kajak12

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Offline ozmillsy

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Re: parts for diy kajak12 clock
« Reply #3 on: September 27, 2010, 09:06:34 PM »
tick,  ordered.
It's all about the music,, not the equipment.

Offline kajak12

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Re: parts for diy kajak12 clock
« Reply #4 on: September 27, 2010, 09:37:35 PM »
tick,  ordered.
http://cgi.ebay.com.au/IC-socket-holder-turned-pin-gold-insert-DIP-6-way-6pin-/180284864491?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item29f9d0b7eb
now you need one of the above BUT A 10 PIN THE CRYSTALS ARE RECTANGULAR ON THE 6PIN ONLY A TRICHORD CRYSTAL WILL FIT
AVAILABLE FROM JAYCAR
http://cgi.ebay.com.au/5-PCS-Bread-Board-Prototype-proto-442-POINTS-EST58-/180463587641?pt=LH_DefaultDomain_0&hash=item2a0477d139
and a bread board for your crystal.dick smith or jay car they have small ones
still discovering the link between electronics and audio reproduction.so much to learn and so little time

Offline ozmillsy

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Re: parts for diy kajak12 clock
« Reply #5 on: September 30, 2010, 09:02:22 PM »
and a bread board for your crystal.dick smith or jay car they have small ones
I got the small bread board,   tick.

Quote
http://cgi.ebay.com.au/IC-socket-holder-turned-pin-gold-insert-DIP-6-way-6pin-/180284864491?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item29f9d0b7eb
now you need one of the above BUT A 10 PIN THE CRYSTALS ARE RECTANGULAR ON THE 6PIN ONLY A TRICHORD CRYSTAL WILL FIT
AVAILABLE FROM JAYCAR
Now this one I had trouble with.   Jaycar didnt have a 10pin in their range.    Do you mean 10pins each side, 20 in total?    I need a picture of the actual socket Mario.
It's all about the music,, not the equipment.

Offline flemo

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Re: parts for diy kajak12 clock
« Reply #6 on: October 25, 2010, 02:33:18 AM »
I must have missed the link for the low jitter crystal because I can't seem to find it?   ???

Cheers, flemo.

Offline kajak12

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Re: parts for diy kajak12 clock
« Reply #7 on: October 25, 2010, 02:41:12 AM »
still discovering the link between electronics and audio reproduction.so much to learn and so little time

Offline zenelectro

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Re: parts for diy kajak12 clock
« Reply #8 on: October 25, 2010, 04:08:35 PM »
I must have missed the link for the low jitter crystal because I can't seem to find it?   ???

Cheers, flemo.
http://cgi.ebay.com.au/Valab-1PPM-11-2896-MHz-Low-Jitter-TCXO-/300478299790?pt=LH_DefaultDomain_0&hash=item45f5e6fe8e

Guys

If you are going to have a play with clocks and power supplies, it's best to use solid copper
covered blank pcb material.

http://www.jaycar.com.au/productView.asp?ID=HP9512&keywords=pcb+copper&form=KEYWORD

All the gnd returns and capacitor bypasses can be soldered direct to pcb, it's also pretty easy to
work with.

For your oscillator power supplies forget LM317 etc they are pretty noisy, a discrete shunt reg is
a better option.

WRT the oscillator on ebay there is no jitter spec just a ppm which is the long term frequency
stability - this has nothing to do with jitter.   

FWIW - I am not sure whether you will actually like an ultra low jitter clock. The Tentlabs clock has very
low jitter but it appears SV prefers clocks with worse jitter and finds the Tent to be 'sterile'. I haven't got to
the bottom of this but it looks like some kinds of jitter are 'musical'.

Personally my approach is lowest jitter at the clock and get the musicality elsewhere.

Have fun

cheers

Terry 










Offline kajak12

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Re: parts for diy kajak12 clock
« Reply #9 on: October 25, 2010, 04:24:22 PM »
I must have missed the link for the low jitter crystal because I can't seem to find it?   ???

Cheers, flemo.
http://cgi.ebay.com.au/Valab-1PPM-11-2896-MHz-Low-Jitter-TCXO-/300478299790?pt=LH_DefaultDomain_0&hash=item45f5e6fe8e

Guys

If you are going to have a play with clocks and power supplies, it's best to use solid copper
covered blank pcb material.

http://www.jaycar.com.au/productView.asp?ID=HP9512&keywords=pcb+copper&form=KEYWORD

All the gnd returns and capacitor bypasses can be soldered direct to pcb, it's also pretty easy to
work with.

For your oscillator power supplies forget LM317 etc they are pretty noisy, a discrete shunt reg is
a better option.

WRT the oscillator on ebay there is no jitter spec just a ppm which is the long term frequency
stability - this has nothing to do with jitter.   

FWIW - I am not sure whether you will actually like an ultra low jitter clock. The Tentlabs clock has very
low jitter but it appears SV prefers clocks with worse jitter and finds the Tent to be 'sterile'. I haven't got to
the bottom of this but it looks like some kinds of jitter are 'musical'.

Personally my approach is lowest jitter at the clock and get the musicality elsewhere.

Have fun

cheers

Terry 










if you could supply a shunt regulated circuit i will build one with the jaycar board and compare.
still discovering the link between electronics and audio reproduction.so much to learn and so little time

Offline zenelectro

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Re: parts for diy kajak12 clock
« Reply #10 on: October 25, 2010, 11:10:45 PM »
Quote
if you could supply a shunt regulated circuit i will build one with the jaycar board and compare.

A primer on regulators.

http://www.tnt-audio.com/clinica/regulators_noise1_e.html


cheers

Terry

Offline kajak12

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Re: parts for diy kajak12 clock
« Reply #11 on: October 25, 2010, 11:53:08 PM »
Quote
if you could supply a shunt regulated circuit i will build one with the jaycar board and compare.

A primer on regulators.

http://www.tnt-audio.com/clinica/regulators_noise1_e.html


cheers

Terry

thanks terry  i am thinking of buying a teddy reg one day to try
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Offline zenelectro

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Re: parts for diy kajak12 clock
« Reply #12 on: October 26, 2010, 12:15:48 PM »
Quote
if you could supply a shunt regulated circuit i will build one with the jaycar board and compare.

A primer on regulators.

http://www.tnt-audio.com/clinica/regulators_noise1_e.html


cheers

Terry

thanks terry  i am thinking of buying a teddy reg one day to try

I may do a run of +5V shunt regs for people to play with.

What raw supply are you using currently to feed the existing regs?

cheers

Terry


Offline Greg Erskine

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Re: parts for diy kajak12 clock
« Reply #13 on: October 26, 2010, 12:37:38 PM »
Another alternative, the JLH Ripple Eater. This is what I intend to use on my DAC and Squeezebox.

http://users.tpg.com.au/gerskine/greg/jlh%20add-on%20shunt%20regulator.htm#TopOfPage

I have a few PCBs if anyone feels like giving it a try.

Note: I don't think these have been tested for voltages less than 5V.

regards
« Last Edit: October 26, 2010, 12:39:55 PM by Greg Erskine »

Offline omodo

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Re: parts for diy kajak12 clock
« Reply #14 on: October 30, 2010, 06:21:02 PM »
I've got a few Tentlabs 3-pin shuntregs, they might be a good option, could replace your lm317, or keep the lm317 as a pre-reg.. what voltage do you need? I've got 3.3, 5 and -15, but can modify them to pretty much any value

http://www.tentlabs.com/Components/cdupgrade/shunt/index.html

Offline kajak12

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Re: parts for diy kajak12 clock
« Reply #15 on: October 30, 2010, 07:42:25 PM »
5v dc thanks
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Offline PET-240

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Re: parts for diy kajak12 clock
« Reply #16 on: November 23, 2010, 02:33:09 AM »

Another alternative, the JLH Ripple Eater. This is what I intend to use on my DAC and Squeezebox.

http://users.tpg.com.au/gerskine/greg/jlh%20add-on%20shunt%20regulator.htm#TopOfPage

I have a few PCBs if anyone feels like giving it a try.

Note: I don't think these have been tested for voltages less than 5V.

regards

Hey Greg,

What dollars are you talking? What would you use for an adjustable regulator ar am I misreading this and it is a regulator too? Just I want to be able to adjust from 7-9V for a couple of DAC channels, both positive, want to increase separation, does it matter if both are positive instead of one negative?

Thanks

Drew.

Offline Greg Erskine

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Re: parts for diy kajak12 clock
« Reply #17 on: November 25, 2010, 05:45:41 PM »
What dollars are you talking? What would you use for an adjustable regulator ar am I misreading this and it is a regulator too? Just I want to be able to adjust from 7-9V for a couple of DAC channels, both positive, want to increase separation, does it matter if both are positive instead of one negative?

Hi Drew,

$0 for a couple of PCBs. Yes, you still need the adjustable regulator before the JLH ripple eater. These PCBs have been already used in a few DAC and I believe you can have 2 postive voltages on the one PCB, though I haven't done it.

regards