Hi MatthieuMalefoda said:
The solution for over heated +-12v rayregs is depicted below.
Nevertheless I still think more volt less heat is better so I just built a -15v rayreg using 13v zenners and a 1N4148.. The output is -15.28v...
Do you think I can use this voltage with 220uF BG 16v in the opamps ?
Note:
I believe I have the best CD53 on Earth.... and I did not fit the servo clock yet.....
Regards
Ricardo
Attachments
Ricardo the 16V black gate standards are usually ok running 15V. I have had no problems.
Brent
Brent
I'm the BG torture champ:
http://www.diyaudio.com/forums/showthread.php?postid=1445461#post1445461
16V is 16V, right? 😀
I'm too lazy to put 25V in...
Ray
http://www.diyaudio.com/forums/showthread.php?postid=1445461#post1445461
16V is 16V, right? 😀
I'm too lazy to put 25V in...
Ray
rowemeister said:
6h5c said:
Thank you gentlemen
While I wait for the discrete outputs (time + €€€) I will be using +-15v on the opamps with the 220uF 16v BG.
Should I expect the CDP to sound louder ?
Hope not because it is too loud right now.... I am using the preamp pot at 12 o´clock for maximum output.
I will report the results.
Note:
Ray I sent you an e-mail... did you receive it ?
Regards
Ricardo
No it won't sound louder!
You need to attenuate your preamp or the interconnect to it. I run my amp at 3pm when having uber listening sessions.
Strap a few resistors across the vol pot. 2 per channel.
Brent
You need to attenuate your preamp or the interconnect to it. I run my amp at 3pm when having uber listening sessions.
Strap a few resistors across the vol pot. 2 per channel.
Brent
RCruz said:
It's obvious: you have to mod your preamp 😀. Or get rid of it completely and build a passive one, even better.
I must have missed your mail, probably got lost between the other ones...
Ray
6h5c said:
Or even better, build a discrete buffer-stage. I am testing one at the moment and it sounds a lot better than my Alps Black Beauty on it's own.
Lee.
Thomo said:
Mmm, wonder what I'll be replacing my op-amp based pre with... I find passive can be a bit flat sounding, and op-amps add problems, so this discrete buffer idea is exciting.
Ricardo,
You could add an L-pad resistor network at your preamp's input for the CD player. Or if you're feeling brave you could try to reduce the gain of the circuit!
Simon
Hi SimonSimontY said:
As you know, I have a little problem related with breaking things while modding..
My pre is an original Meridian 101 (pre opamp).
It is equiped with a wonderfull phono stage !!!
It is working wonderfully for +-30 years (and it plays everytime anybody is at home).
So I wonder what could happen if I broke it... No spares, no schematics.... right ?
I have been looking for a compatible power amp and can not decide due to the lack of info...
Nevertheless I will be following lee´s buffer stage closely.
Ricardo
Hi Ray6h5c said:
I can get rid of my pre because I need the precious phono stage.
After looking at your work with amps, I sent you an e-mail asking your oppinion about the Meridian 101 pre and the possibility of upgrading the power amp.
I will send it again.
Thank you for all the help.
Ricardo
Hi Ricardo,
You can ask... but I don't know these! Unless you have a service manual or schematic of some kind...
As for upgrading them: The General Rules Of Tweaking apply here: replace existing components with better ones!
Ray
You can ask... but I don't know these! Unless you have a service manual or schematic of some kind...
As for upgrading them: The General Rules Of Tweaking apply here: replace existing components with better ones!
Ray
Hehe, power supplies and components in the signal path are usually the best culprits for improvement.... so it's resistors and caps as ever.
Simon
Simon
I know Iknow....🙄
Maybe I will start by the line atenuator with two resistors in the cd input.....
Than I will open the power amp psu and see how it looks... maybe I can upgrade the smoothing caps...
If I learn enough, I will build a bigger psu....
Wish me luck
Maybe I will start by the line atenuator with two resistors in the cd input.....
Than I will open the power amp psu and see how it looks... maybe I can upgrade the smoothing caps...
If I learn enough, I will build a bigger psu....
Wish me luck
I emailed you Ricardo regarding those amps😉
I have a set of those here too and got good results from upgrading the caps in the psu and also the power amp.
Good News! My mate Hifi Dave came round the other day, and had a quick listen to my CD63. It's defo miles better than his cd67 which is well modded. With two clocks the cd63 sounds much more realistic, and detailed.
Lee.
I have a set of those here too and got good results from upgrading the caps in the psu and also the power amp.
Good News! My mate Hifi Dave came round the other day, and had a quick listen to my CD63. It's defo miles better than his cd67 which is well modded. With two clocks the cd63 sounds much more realistic, and detailed.
Lee.
Hi LeeThomo said:
I read your e-mail and was very informative... When I open the psu, I will surely report to you.
Do you want to part with yours ?
I would really like to try the option of two psu with my actual power amp... Meridian informs it as a stock upgrade..
Note:
Obvioulsy not as good as yours but my CD53 is unbeliaveble good sounding now.
I believe when I install the servo clock it will become a true high end machine.
Regards
Ricardo