XTRProf
Fully Modded
Pssst ! Got any spare capacitors ?
Posts: 5,689
|
Post by XTRProf on Dec 8, 2012 7:51:09 GMT
Well, is there anything better value than a cheap Burson clock with it's own discrete super power at about 5 to 10ps jitter? Finally hope to get one to up the ante of my MF X-Dac V3 from 120ps as itchy finger seems to be back. Specs here: bursonaudio.com/DIY_Low_Jitter_Clock.htmlI'll be getting the 24.576 MHz version obviously.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Dec 8, 2012 8:12:24 GMT
Well, is there anything better value than a cheap Burson clock with it's own discrete super power at about 5 to 10ps jitter? Finally hope to get one to up the ante of my MF X-Dac V3 from 120ps as itchy finger seems to be back. Specs here: bursonaudio.com/DIY_Low_Jitter_Clock.htmlI'll be getting the 24.576 MHz version obviously. Chong Did you win the lottery, or are you just plain nuts ? $185 + P and P for an oscillator when you can buy a low PPM 24.576MHZ Vanguard TCXO off ebay, and breadboard a "Cricket" or similar ? Alex
|
|
pagan
Been here a while!
Posts: 512
|
Post by pagan on Dec 8, 2012 10:01:18 GMT
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Dec 8, 2012 10:19:20 GMT
Do they make a 24.576 MHz version??? Also check at audio-gd to see if they have the same thing.. Allan Their type 3 has similar specs to the TCXO that I am using. At $45 + P and P it is very well priced. Alex www.audio-gd.com/Pro/diy/JZ1/JZEN.htmP.S. I would like to know the mark/space ratio at it's 3 output frequencies.
|
|
XTRProf
Fully Modded
Pssst ! Got any spare capacitors ?
Posts: 5,689
|
Post by XTRProf on Dec 8, 2012 11:53:46 GMT
Yes, there is one at 24.576 Mhz. Only about USD 60 year end sales. That's why the interest. Not USD 185 or whatever. Is the clock on the Burson a TCXO type? What advantage over normal one? Also, with super power already or I need another super regulator for the Burson. If ok, I'll buy one. At least, it's branded.
|
|
pagan
Been here a while!
Posts: 512
|
Post by pagan on Dec 8, 2012 12:52:26 GMT
Yes, there is one at 24.576 Mhz. Only about USD 60 year end sales. That's why the interest. Not USD 185 or whatever. Is the clock on the Burson a TCXO type? What advantage over normal one? Also, with super power already or I need another super regulator for the Burson. If ok, I'll buy one. At least, it's branded. I could not find it on there site so I can not say..
|
|
XTRProf
Fully Modded
Pssst ! Got any spare capacitors ?
Posts: 5,689
|
Post by XTRProf on Dec 8, 2012 13:14:55 GMT
I mean the Burson XO picture any resemblance to a TXCO with super power?
|
|
pagan
Been here a while!
Posts: 512
|
Post by pagan on Dec 8, 2012 13:29:28 GMT
I mean the Burson XO picture any resemblance to a TXCO with super power? Looks like Burson are using the XO's frrom China, whether they are the Vanguard is not Known. As for there class A power supply hype, Each to there own. I still think the audio-gd's clocks would be better. A for there spec's...... well they are not as good as others. And for a clock spec's, where is there phase noise spec's. As for there write-ups on why discrete is better than opamps, cannot match a transistor on die as good as discrete? ? I think they have totally missed the point about discrete circuits. Allan
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Dec 8, 2012 21:14:38 GMT
Personally, I would pay the little extra for the AudioGD TCXO version.What would you rather have in a highly specified circuit, a normal Xtal, or a Xtal in a Xtal Oven as per high tech communications gear etc. ? A TCXO isn't that far removed from a Xtal in an oven as far as stability goes.
|
|
leo
Been here a while!
Team wtf is it?
Posts: 3,638
|
Post by leo on Dec 8, 2012 22:07:23 GMT
I got one of the Burson clocks very cheap quite a while ago. Its actually not bad but it seems the prices have gone up quite a bit? The discrete onboard regulation is quite decent. I'm going to be trying it with the PCM5102, It has an oboard divider so when I swap its stock XO with the 45.15MHz Vanguard XO I get multiple outputs. This makes things convenient for me.
Going diy as already suggested by Alex would be the cheapest option and not too hard if you only need one output.
|
|
leo
Been here a while!
Team wtf is it?
Posts: 3,638
|
Post by leo on Dec 8, 2012 22:22:15 GMT
Heres one of my old pictures with the XO fitted in a CDP
|
|
pagan
Been here a while!
Posts: 512
|
Post by pagan on Dec 9, 2012 0:15:11 GMT
I got one of the Burson clocks very cheap quite a while ago. Its actually not bad but it seems the prices have gone up quite a bit? The discrete onboard regulation is quite decent. I'm going to be trying it with the PCM5102, It has an oboard divider so when I swap its stock XO with the 45.15MHz Vanguard XO I get multiple outputs. This makes things convenient for me. Going diy as already suggested by Alex would be the cheapest option and not too hard if you only need one output. Hi Leo The price have gone up quite a bit? AUS $185.00 is way excessive for what it is, IMO, for that price there's also the tent XO's too, and probably a lot better. What quality was the stock XO? Admittedly XTRPRrof said he could get it for US $60,00, but then audioGD's are US $45.00. DIY would be better ie vanguard XO with alex's cricket. (or a flea) Allan
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Dec 9, 2012 0:40:38 GMT
|
|
leo
Been here a while!
Team wtf is it?
Posts: 3,638
|
Post by leo on Dec 9, 2012 23:18:36 GMT
I got one of the Burson clocks very cheap quite a while ago. Its actually not bad but it seems the prices have gone up quite a bit? The discrete onboard regulation is quite decent. I'm going to be trying it with the PCM5102, It has an oboard divider so when I swap its stock XO with the 45.15MHz Vanguard XO I get multiple outputs. This makes things convenient for me. Going diy as already suggested by Alex would be the cheapest option and not too hard if you only need one output. Hi Leo The price have gone up quite a bit? AUS $185.00 is way excessive for what it is, IMO, for that price there's also the tent XO's too, and probably a lot better. What quality was the stock XO? Admittedly XTRPRrof said he could get it for US $60,00, but then audioGD's are US $45.00. DIY would be better ie vanguard XO with alex's cricket. (or a flea) Allan Hi Allan, The Burson XO was just a standard type, when I dig out the clock from my stash I'll have a look what make it is. Its certainly not on par as say the Tent. I currently use a Tent XO in the QA550 run from a PH mini shunt. Even a standard XO can be greatly improved given a clean separate supply. Something could be knocked up on vero but if a Burson or Audiogd can be had cheap that may be the easiest option. I don't know the X-dacs innards without reading through all the threads. If it was me and the stock XO shares the dacs supplies I'd go for sorting out the stock XO supply first. Removing as much contamination as possible.
|
|
XTRProf
Fully Modded
Pssst ! Got any spare capacitors ?
Posts: 5,689
|
Post by XTRProf on Dec 14, 2012 15:50:31 GMT
I don't know the X-dacs innards without reading through all the threads. If it was me and the stock XO shares the dacs supplies I'd go for sorting out the stock XO supply first. Removing as much contamination as possible. Have also ordered some 5V 2A Super Vregs. Can't get the 3.3V 2A ones though as out of stock. Is the PH 3.3V 200mA one good enough to replace the 3.3V std Vreg at about 1.5A? PH has the lowest noise of all 78XX and 79XX style super power as they are shunt but not the lowest in ripple rejection. Maybe I just run the XO with a PH 3.3V 200mA super Vreg. That should be more than enough current to run the XO only.
|
|
XTRProf
Fully Modded
Pssst ! Got any spare capacitors ?
Posts: 5,689
|
Post by XTRProf on Dec 17, 2012 1:11:54 GMT
Alex, I have a look at the link and found that you have heatsinks on top of the OPA. How did you manage to stick the heatsinks on them without falling off with thermal compound? Also, is the Cricket a shunt regulator? How many V and A capable? If is, I will be interested to make some later.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Dec 17, 2012 1:32:17 GMT
Chong I use the material at the attached link. www.jaycar.com.au/productView.asp?ID=NM2790The "Cricket" is opamp based, and is really only suitable for 30mA or so, depending on the type of opamp used. Chris from Spain sometimes cheats by piggybacking another opamp of the same type on top, to double the current capability. The output voltage is set by the voltage of the Zener diode used. Alex. P.S. Check your PMs.
|
|
XTRProf
Fully Modded
Pssst ! Got any spare capacitors ?
Posts: 5,689
|
Post by XTRProf on Dec 17, 2012 2:15:27 GMT
Good! Now that widens my horizon as I had not use that in my PCBA plant days. The "Cricket" is opamp based, and is really only suitable for 30mA or so, depending on the type of opamp used. Chris from Spain sometimes cheats by piggybacking another opamp of the same type on top, to double the current capability. The output voltage is set by the voltage of the Zener diode used. Maybe I triple cheat too just for the clock! This is shunt super power, btw?
|
|