GE DUAL Ripple Eater Boards - Limited Availablilty

[gommer]

Hi Jon,

The package arrived today. Who says surface mail is slow?
Nice looking PCB's, tinier then i expected, they should fit almost everywhere.

Thanks again.

Cheers, Marc

[Deleted]

Feb 14, 2013 12:46:15 GMT gommer said:

Hi Jon,

The package arrived today. Who says surface mail is slow?
Nice looking PCB's, tinier then i expected, they should fit almost everywhere.

Thanks again.

Cheers, Marc

Hi Marc
For even tighter spaces, you can cut them down the centre ( carefully!) and stack one on top of the other.
Don't forget to use a J506 FET instead of the 10K resistor for operation at +5V or +3.3V

You could also use a selected N-FET such as the 2N5484 with a current of around 1.5mA when G and S are tied,
(e.g. test with something like +15V and a 100 ohm drain resistor)
or trim the current to 1.5mA approx.with a resistor in series with the Source lead.
Kind Regards
Alex

[hirez69]

Hi Jon & Alex

PM sent yesterday and today

Many thanks

hirez69

Feb 13, 2013 17:48:25 GMT jonclancy said:

IIRC, still to hear from:

steveecrane....04
PinkFloyd.......04

hirez69...........06
Listener..........04

etoiledusoir.....02
Telstar............02
Porfido.........04
Seavan..........06

[pingu]

Hi Jon,
Boards arrived Tuesday but have been away untill tonight. All unpacked and safe thanks.
Bartin

[pingu]

Hi All,
Maybe this is one for Alex.
Pls excuse me if this is a no brainer I am only a keen beginner.
I am just ordering the bits for a few of the boards, to make them "generic" to fit a couple of psu's I intended to make the 500/550ma version using a large wattage resist (or may lower wattage paralleled) for R12/112.
Will the listed transistors be OK, especially the 2sc5171 and 2sc1930 used for Q6 & Q106 and the listed diodes (1N4148's)?
They will be used on cpu's from 12v to 20volt +/-
Any help advice greatly appreciated
Martin

[Deleted]

Feb 16, 2013 22:44:57 GMT pingu said:

Hi All,
Maybe this is one for Alex.
Pls excuse me if this is a no brainer I am only a keen beginner.
I am just ordering the bits for a few of the boards, to make them "generic" to fit a couple of psu's I intended to make the 500/550ma version using a large wattage resist (or may lower wattage paralleled) for R12/112.
Will the listed transistors be OK, especially the 2sc5171 and 2sc1930 used for Q6 & Q106 and the listed diodes (1N4148's)?
They will be used on cpu's from 12v to 20volt +/-
Any help advice greatly appreciated
Martin

A .5W or 1W resistor is all that is needed there. Don't forget that there will be several hundred mV drop through the JLH when the current limiter is used.
If you are using voltage regulators such as the LM78xx/LM79xx or the LM317T/LM337T ahead of it, then best results will be obtained with the Current Limiter section bypassed.
The original CL circuit can be quite touchy to get right at more than the originally published 100mA maximum limit.
With the CL bypassed, provided that a small heatsink is fitted to the 2sa/2sc device with the 33 ohm emitter resistor, it can even handle 2A at +12V.
Do NOT use it with aPC's SMPS unless you protect the JLH at start up using something like a relay and PW5 resistor as posted in another thread.
Regards
Alex

[pingu]

Thanks Alex,
I understand and yes as they will be used with regulated psu's as you mention so I will just bypass the limiters, seems the easiest way to do things. Just a couple of HA's and a phono so 550ma will be the max I think I will need so a simple approach sounds good.
Passed a couple of boards on to son in law so will let him see your comments too.

I see in the article a diode can also be connected across R9... or maybe that is a different approach.
Thanks for the advise about PC's I have read that but will not be using them on that type of psu at the moment however will keep it in mind.
Thanks
Martin

[Deleted]

Feb 17, 2013 1:24:31 GMT pingu said:

Thanks Alex,
I understand and yes as they will be used with regulated psu's as you mention so I will just bypass the limiters, seems the easiest way to do things. Just a couple of HA's and a phono so 550ma will be the max I think I will need so a simple approach sounds good.
Passed a couple of boards on to son in law so will let him see your comments too.

I see in the article a diode can also be connected across R9... or maybe that is a different approach.
Thanks for the advise about PC's I have read that but will not be using them on that type of psu at the moment however will keep it in mind.
Thanks
Martin

Hi Martin
Forget about that diode. There is no provision for it on Greg's latest PCBs anyway.
Seeing that you will be bypassing the CL section, I recommend using a 4,700uF 10V low ESR electro and a normal 4,700uF 16V in parallel on both halves of the PCB.
Just remember that it takes around 48 hours of use to fully stabilise.If you have a bench PSU you can condition it before using it in your project.
Anything from 5V to 15V will do for that.
Kind Regards
Alex

[pingu]

Hi Alex,
Thanks for the information. I think I'll use your method and bypass the c/l circuit all together, that will save changing Q3 & Q5.
Where would the 4,700uF caps go, on the initial input in place of the c/l circuits or elsewhere? (observing polarity of course)
Bearing in mind I may be using one board on a 20v psu should I keep one cap to 10v low ESR and up the other to 4,700uF >30v?
Thanks for details about burning in I'll hook them up to a +/- 12v 200ma psu for a few days before I use them.

All the Best
Martin

[4est]

Just a quick note to say "thanks" to Jon! Boards arrived yesterday safe and sound.

I appreciate your providing this opportunity to all of us...

Forrest

[mkusan]

My boards arrived as well, thanks Jon.
One question, anyone used ripple eater as a psu for a cd clock?

thanks
marko

[Deleted]

I haven't used one directly with a CD clock although it should work quite well.
I use them preceding a simple zener and opamp PSU as in the attached photo.
I also have one preceding a Paul Hynes 3.3V regulator to supply a DIR9001 with squeaky clean power., and others feeding the DAC PCB as in the photo with +5V, and + and - 15V.
I also use them in Class A preamps and headphone amplifiers, as well as supplying the fronr end of a 15W/Ch Class A amplifier as in the DIY thread here.
Regards
Alex

URL=http://imageshack.us/photo/my-images/228/scdacs31082012.jpg/][/URL]

[mkusan]

I was thinking about using
either
The Flea or ripple eater for the clock.
By looking at your pictures  I am now tempted to use both

Thank you Alex

Marko

[Deleted]

Feb 20, 2013 10:50:49 GMT mkusan said:

I was thinking about using
either
The Flea or ripple eater for the clock.
By looking at your pictures  I am now tempted to use both

Thank you Alex

Marko

Marko
The attached may be of interest. With my X-DAC V3 I use an external + and -15V PSU with a JLH, and in the X-DAC V3 itself,
I use the "Cricket"(single version) to supply a Vanguard .3PPM 24.576MHZ TCXO


See the simplofied version of something a bit like a PFM flea that several of us use in conjunction with a JLH

rockgrotto.proboards.com/thread/4477/new-hq-diy-dac?page=3#page=4

[mkusan]

Alex,
this is certainly of interest. I would just need the TCXO, everything else I have readily available.
Low jitter clock with low noise psu for £12.95 sounds good to me.

Thanks again
Marko

[Deleted]

Hi Will,

Boards rolled up today.

Many thanks.

[Deleted]

Feb 20, 2013 12:26:11 GMT mkusan said:

Alex,
this is certainly of interest. I would just need the TCXO, everything else I have readily available.
Low jitter clock with low noise psu for £12.95 sounds good to me.

Thanks again
Marko

Marko
You will see a "Cricket" and .3PPM TCXO fitted inside an X-DAC V3 at the link
Regards
Alex

rockgrotto.proboards.com/thread/8115/extreme-dac-v3-revisited

[jonclancy]

PinkFloyd and hirez69: your boards went in the post this morning.

[Deleted]

Hi All

Here is a quick snap of my Greg’s JLH board Build.

Without CL and waiting for the C1/101 C2/202 film caps which are on the way by snail mail.



Just to point aot that nearly all of the hard work was done long before I had my hands on these boards.

So a big thanks again to (in no particular order) Greg, Jon, will and Alex for all of the hard work put into thiese and the mighty single boards.

Take care

[steveecrane]

Jon,

Just PM'd you with a note and an apology vis-a-vis this:

Feb 13, 2013 17:48:25 GMT jonclancy said:

IIRC, still to hear from:

steveecrane....04
PinkFloyd.......04

hirez69...........06
Listener..........04

etoiledusoir.....02
Telstar............02
Porfido.........04
Seavan..........06

Will set about paying you tomorrow...

[Deleted]

Hi All

Does anyone have a link to the single sided JLH build manual?

From memory it gave a nice little explanation of how the circuit works which could be of interest to new builders.

Just a thought

Take care

[Deleted]

Hi One!

I have the old word file that Dave "canjunkie" originally sent out. I tried pasting up into a skydrive word file but it made a total balls up of it, losing all the diagrams and pictures.

If you know another to create a linkable file I'm all ears!

Aha! sorted.

Making thread in saucerful....

[Deleted]

Feb 27, 2013 18:51:13 GMT @cjarchez said:

Hi One!

I have the old word file that Dave "canjunkie" originally sent out. I tried pasting up into a skydrive word file but it made a total balls up of it, losing all the diagrams and pictures.

If you know another to create a linkable file I'm all ears!

Aha! sorted.

Making thread in saucerful....

How's it going Two



Hi Chris

I’ve just found this on the build guide and support thread

www.gt6.co.uk/JLHPSRR/John%20Linsley%20Hood%20ripple%20Eater%20-%20Rock%20Grotto%20Charity%20Edition.html

It has a really well written overview of the circuit, great build tips and some interesting historical stuff and even though it’s for the RG single board it’s a must read for anyone building for the first time.

Great stuff

And the support thread is here should anyone wish to have a read through

rockgrotto.proboards.com/thread/5645

Think I’ll just pop off for some reading

edit

i found the full manual over on DIYA for the second GB but it's in booble docs so i can't open it.

ho hum

Thanks again Chris

Take care

[jonclancy]

Who is after what??

Full Manual


Appendix One


Mini Manual

HTH

Jon

[Deleted]

Hi Jon

Thanks for the above links but unfortunately I’m having problems with the Google docs download.

It keeps asking for a password.

Take care