LClock XO PSU

carlosfm · 9th August 2004, 12:03 AM

Hi,

I'm going to make a new PSU (including trafo) for my old LClock XO.
Although the clock must receive the cleanest PSU possible, I was always puzzled why LC-Audio was selling an unregulated PSU for this (at least at the time I bought this clock, around 1999).
So, what's the best option?

1. Unregulated: trafo + schottky diodes + caps.

2. Regulated: trafo + schottky diodes + caps + reg.

What reg?
Would a LM317 do the job fine?
I have some TL431s around here too.
Some better option?

For the diodes I have some here that I may use:
- MBR1100
- MUR1100
- BA159

BTW you can see the schematic of this clock posted by Lars here, posts #39 and 40:
LClock Schematics

Thanks

Pan · 9th August 2004, 08:42 AM

I thought the LClock used reg. on the clock board... no?

Maybe the latest models only..

/Peter

carlosfm · 9th August 2004, 08:54 AM

Yes, Peter.
If you look at the XO schematic posted by Lars (link on my first post), it also has regulation on board.
The question is: dedicated PSU: regulated or unregulated?
I ask this because in some cases double regulation is not better.

carlosfm · 9th August 2004, 11:29 AM

It seams that the PSU is still the same, and it looks like an unregulated one:

http://www.lcaudio.dk/com/hyperkit.jpg

Maby I don't need to use regs here...
I made up my mind: gonna make a regulated PSU, with two outputs, reg. and unreg. and compare.

Pan · 9th August 2004, 12:32 PM

"I made up my mind: gonna make a regulated PSU, with two outputs, reg. and unreg. and compare. "

That´s my man

Hehe, Carlos, yesterday I happened to scan thru the old "audible differences in amp" thread, you know the one which never wanted to end? haha so much fun I miss it!

/Peter

carlosfm · 9th August 2004, 01:12 PM

You mean this one?
Blind Listening Tests & Amplifiers

This was an excellent thread.

I don't know what happened to Eric (MrFeedback).
I liked that guy...

jameshin · 9th August 2004, 01:37 PM

I'm using a KF50BDT regulator for my TCXO, the KF have a more "analogue" sound than those LM317 , 7805 and LT1086 that I've tried.

KF regulators...

http://www.premier-electric.com/files/STM/pdf/KFxx.pdf

Calimero · 9th August 2004, 03:14 PM

especially need a low noise supply for a clock-circuit to perform its best.
A TL431 nor LM317 are not the regs I (a novice) would use in such application. An LT1086CT would be more my choice. You could also have alook at the power supply used in Elso's clock design
Would be nice to to know the strenghts/weaknesses of an offspring of the LC-Audio and KWAK clock (Possible name could be The LC-KWAK' clock

)

Henk

carlosfm · 9th August 2004, 03:29 PM

Hi Henk,

The Kwak clock has regs on board.
The Tent clocks too (XO2 and XO3).
The LClock too.

They are all different.
I just wonder why LC-Audio sells a dedicated unregulated PSU for their clocks?
Maby they found out that the regulation they have on-board doesn't need pre-regulation?

carlosfm · 9th August 2004, 04:23 PM

Quote:

Originally posted by jameshin
KF regulators...

I didn't know those regs, thanks.

9th August 2004, 12:03 AM	#1
carlosfm Banned Join Date: Mar 2003 Location: Lisbon, Portugal	LClock XO PSU Hi, I'm going to make a new PSU (including trafo) for my old LClock XO. Although the clock must receive the cleanest PSU possible, I was always puzzled why LC-Audio was selling an unregulated PSU for this (at least at the time I bought this clock, around 1999). So, what's the best option? 1. Unregulated: trafo + schottky diodes + caps. 2. Regulated: trafo + schottky diodes + caps + reg. What reg? Would a LM317 do the job fine? I have some TL431s around here too. Some better option? For the diodes I have some here that I may use: - MBR1100 - MUR1100 - BA159 BTW you can see the schematic of this clock posted by Lars here, posts #39 and 40: LClock Schematics Thanks

9th August 2004, 03:14 PM	#8
Calimero Banned Join Date: Aug 2003 Location: A farm on the prairie (protcted from foxes)	According to the clock-monks, you especially need a low noise supply for a clock-circuit to perform its best. A TL431 nor LM317 are not the regs I (a novice) would use in such application. An LT1086CT would be more my choice. You could also have alook at the power supply used in Elso's clock design Would be nice to to know the strenghts/weaknesses of an offspring of the LC-Audio and KWAK clock (Possible name could be The LC-KWAK' clock ) Henk

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9th August 2004, 08:42 AM	#2
Pan diyAudio Member Join Date: Sep 2002	I thought the LClock used reg. on the clock board... no? Maybe the latest models only.. /Peter

9th August 2004, 08:54 AM	#3
carlosfm Banned Join Date: Mar 2003 Location: Lisbon, Portugal	Yes, Peter. If you look at the XO schematic posted by Lars (link on my first post), it also has regulation on board. The question is: dedicated PSU: regulated or unregulated? I ask this because in some cases double regulation is not better.

9th August 2004, 11:29 AM	#4
carlosfm Banned Join Date: Mar 2003 Location: Lisbon, Portugal	It seams that the PSU is still the same, and it looks like an unregulated one: http://www.lcaudio.dk/com/hyperkit.jpg Maby I don't need to use regs here... I made up my mind: gonna make a regulated PSU, with two outputs, reg. and unreg. and compare.

9th August 2004, 12:32 PM	#5
Pan diyAudio Member Join Date: Sep 2002	"I made up my mind: gonna make a regulated PSU, with two outputs, reg. and unreg. and compare. " That´s my man Hehe, Carlos, yesterday I happened to scan thru the old "audible differences in amp" thread, you know the one which never wanted to end? haha so much fun I miss it! /Peter

9th August 2004, 01:12 PM	#6
carlosfm Banned Join Date: Mar 2003 Location: Lisbon, Portugal	You mean this one? Blind Listening Tests & Amplifiers This was an excellent thread. I don't know what happened to Eric (MrFeedback). I liked that guy...

9th August 2004, 01:37 PM	#7
jameshin diyAudio Member Join Date: Dec 2003 Location: HONG KONG	I'm using a KF50BDT regulator for my TCXO, the KF have a more "analogue" sound than those LM317 , 7805 and LT1086 that I've tried. KF regulators... http://www.premier-electric.com/files/STM/pdf/KFxx.pdf

9th August 2004, 03:29 PM	#9
carlosfm Banned Join Date: Mar 2003 Location: Lisbon, Portugal	Hi Henk, The Kwak clock has regs on board. The Tent clocks too (XO2 and XO3). The LClock too. They are all different. I just wonder why LC-Audio sells a dedicated unregulated PSU for their clocks? Maby they found out that the regulation they have on-board doesn't need pre-regulation?

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