Thanks, but be aware that I don't go to London that often anymore. Years ago I used to go there five to six times a year.
We will be there from Sunday to Wednesday only this time. We will visit the fist night of the new Tosca production at the ROH.
Regards
Charles
I'd be interested to read any comments about how live and dynamic Lar's new modules sound when adjusting the feedback loop, especially compared to the UCD modules.
Regards,
Dean
Regards,
Dean
Thanks for all your comments, questions and suggestion.
The lifetime of the eeprom is exactly why the update frequency is only once every minute. With that freq we can store 4 8 bit values per minute, and roll them over in the eeprom memory for around 50.000 operational Hours, (about 6 years). After that the eeprom functionality is no longer guaranteed, but it will most probably work for quite a while longer. And even if the eeprom fails, the amplifier and microprocessor control will still work fine, only without the memory diagnostics.
The challenge however is, to build the most useful diagnostics, and that may still remain. (Like you already pointed out Chris). In most cases we know the cause of a meltdown, like shorting the output to a voltage rail, reversing plus and minus, and so on, so we dont need the temperature and voltage diagnostics.
As for issues with modules going faulty, my plan is to first offer assistance to find the cause for the malfunction, and then provide immediately new modules under warranty. So the diagnostics function will be entirely for my own internal use. Namely to find the cause of any occurance. And thankyou Chris, and soongsc for your very comprehensive thoughts on such diagnostics software, i will definetely take the ideas into consideration.
The software to download data from the eeprom, is by the way available for free from Atmel's homepage, so everybody can try it on their PC. You need also a 6 pin AVR programming dongle, (www.olimex.com) and more seldomly occuring these days, a serial port on your PC 😉
classd4sure said:
The lifetime of the eeprom is exactly why the update frequency is only once every minute. With that freq we can store 4 8 bit values per minute, and roll them over in the eeprom memory for around 50.000 operational Hours, (about 6 years). After that the eeprom functionality is no longer guaranteed, but it will most probably work for quite a while longer. And even if the eeprom fails, the amplifier and microprocessor control will still work fine, only without the memory diagnostics.
The challenge however is, to build the most useful diagnostics, and that may still remain. (Like you already pointed out Chris). In most cases we know the cause of a meltdown, like shorting the output to a voltage rail, reversing plus and minus, and so on, so we dont need the temperature and voltage diagnostics.
As for issues with modules going faulty, my plan is to first offer assistance to find the cause for the malfunction, and then provide immediately new modules under warranty. So the diagnostics function will be entirely for my own internal use. Namely to find the cause of any occurance. And thankyou Chris, and soongsc for your very comprehensive thoughts on such diagnostics software, i will definetely take the ideas into consideration.
The software to download data from the eeprom, is by the way available for free from Atmel's homepage, so everybody can try it on their PC. You need also a 6 pin AVR programming dongle, (www.olimex.com) and more seldomly occuring these days, a serial port on your PC 😉
Hi,
Thanks Lars, and you're very welcome, thanks for listening. I've no doubt whatever does get implemented be best for everyone. Looking forward to see what you end up with.
Regards,
Chris
Thanks Lars, and you're very welcome, thanks for listening. I've no doubt whatever does get implemented be best for everyone. Looking forward to see what you end up with.
Regards,
Chris
This one looks really interesting... 😀
Hopefully we can see a bunch of reviews as soon as Lars is finished his testing and the product is released for us.
I will for sure consider to buy one of the introduction offers... Lars - how long will you have those offers?
Hopefully we can see a bunch of reviews as soon as Lars is finished his testing and the product is released for us.
I will for sure consider to buy one of the introduction offers... Lars - how long will you have those offers?
Hi Lars
Just wondering how your NCD700 is progressing😎
Very exciting and very much look forward to hearing the results😀
Just wondering how your NCD700 is progressing😎
Very exciting and very much look forward to hearing the results😀
Hi Lars
How's the testing going?
Very exciting, microprocessor controlled feedback/deadtime.
Any news. How soon to you realeasing the NCD700
rgds
How's the testing going?
Very exciting, microprocessor controlled feedback/deadtime.
Any news. How soon to you realeasing the NCD700
rgds
KLe said:
You may want to reread the thread very carefully. The MCU is only there for protection circuitry!!
I have already received many new orders for NewClassD modules. And Thank You all for that! The plan is to release the modules in mid August. Before that this is what is going on:
1..At ths point a few tests still remain to be worked, these will be completed by July 1st.
2..July 1st a new Ltd is established, to handle the New Audio Activities.
The new company is named: Dexa Technologies ltd. Dexa Technologies will own NewClassD, the new D-Clocks and also some other stuff.
3..Production commenses, immediately after July 1st, of NewClassD amplifiers, and D-Clocks.
4..The Web Shop on NewClassD.com will open by mid July, and will receive orders, but not for same day shipping in the beginning. Probably will have some opening offers, for pre orders though.
5..The cookbook will be available at the end of July, and will be built after a brand new principle, which is more user friendly, a so called EDAM system. This stands for 'Example, Documentation, Analysis, Modification' and will make amplifier construction very simple, easy to learn, and not require as much previous skill as before. And for all you guys who already know most of Amplifier construction, well, there will also be a 'need to know' section for you guys, with the short form information required to start the modules.
6..Production modules will be in after about 3 weeks, in the end of July, and will be ready for testing and packing. And by mid August we should start accepting same-day shipping orders.
7..As fast as the generation of good quality documentation, and development allows, after that we will commense making further new products for DIY.
1..At ths point a few tests still remain to be worked, these will be completed by July 1st.
2..July 1st a new Ltd is established, to handle the New Audio Activities.
The new company is named: Dexa Technologies ltd. Dexa Technologies will own NewClassD, the new D-Clocks and also some other stuff.
3..Production commenses, immediately after July 1st, of NewClassD amplifiers, and D-Clocks.
4..The Web Shop on NewClassD.com will open by mid July, and will receive orders, but not for same day shipping in the beginning. Probably will have some opening offers, for pre orders though.
5..The cookbook will be available at the end of July, and will be built after a brand new principle, which is more user friendly, a so called EDAM system. This stands for 'Example, Documentation, Analysis, Modification' and will make amplifier construction very simple, easy to learn, and not require as much previous skill as before. And for all you guys who already know most of Amplifier construction, well, there will also be a 'need to know' section for you guys, with the short form information required to start the modules.
6..Production modules will be in after about 3 weeks, in the end of July, and will be ready for testing and packing. And by mid August we should start accepting same-day shipping orders.
7..As fast as the generation of good quality documentation, and development allows, after that we will commense making further new products for DIY.
Hi Orson
Thank You for your question as sent to me by DIYA mail.
Right now i am waiting for the start date of the new company, which is 1st July, and then afterwards i can apply for a credit card payment agreement. Which then takes some time for administration, approval etc.
Until then i have set up a special pre-order offer, where those who already know they are probably going to get one of these amplifiers, can save a little money by ordering it now. The pre-order uses PayPal to get started. You find a button on the low end of the front page of www.newclassd.com.
I would guess it will be until mid August before the NewClassD site can accept credit card payment directly.
In return for a discount of around 15% you accept that you don't get the modules as a same-day shipment right now, but instead will receive them in the first batch sent out in mid August.
Thank You for your question as sent to me by DIYA mail.
Right now i am waiting for the start date of the new company, which is 1st July, and then afterwards i can apply for a credit card payment agreement. Which then takes some time for administration, approval etc.
Until then i have set up a special pre-order offer, where those who already know they are probably going to get one of these amplifiers, can save a little money by ordering it now. The pre-order uses PayPal to get started. You find a button on the low end of the front page of www.newclassd.com.
I would guess it will be until mid August before the NewClassD site can accept credit card payment directly.
In return for a discount of around 15% you accept that you don't get the modules as a same-day shipment right now, but instead will receive them in the first batch sent out in mid August.
Thanks, Lars.
One more quick question / clarification. Based on what I see on the website, the six wire power supply will require a transformer with and additional set of 18-0-18 secondaries or a separate transformer with the same specifications.
Is this correct?
One more quick question / clarification. Based on what I see on the website, the six wire power supply will require a transformer with and additional set of 18-0-18 secondaries or a separate transformer with the same specifications.
Is this correct?
Sorry, one more question:
Can the fast-on connectors provided to mount the PS capacitors horizontally also be used to increase total capacitance? Do you feel there will be any need to increase to increase the capacitance of the supply if two modules are expected to produce full output?
Ooops, that was two questions.
Can the fast-on connectors provided to mount the PS capacitors horizontally also be used to increase total capacitance? Do you feel there will be any need to increase to increase the capacitance of the supply if two modules are expected to produce full output?
Ooops, that was two questions.
Passivo: Q1: You need one winding of 15V, 15-0-15V is not necessary.
Q2: Yes they can be used for that, since the caps on the power supply are quite fast, you can get a way with adding a couple of large (slow) cans to the fast on terminals.
Just remember GND is towards the outside of the board, while the 'hot' terminals are towards the middle.
All the best from
Lars
Q2: Yes they can be used for that, since the caps on the power supply are quite fast, you can get a way with adding a couple of large (slow) cans to the fast on terminals.
Just remember GND is towards the outside of the board, while the 'hot' terminals are towards the middle.
All the best from
Lars
As I can understand (newbie-warning - I have newer built an amp before) the only thing that has to be added to the starter kit with 2 modules and power supply is the transformer. Of course the chassis, cables and contacts also has to be added but the transformer must be right.
Lars (or anyone else…): Can you recomend a transformer?
Lars (or anyone else…): Can you recomend a transformer?
Matsen. I can recommend this model from ELFA in Sweden: 56-139-97. Look at www.elfa.se
You can use that with a 4 wire power supply directly, or add a single 15V AC 15VA transformer for slightly lower power consumption, and use the 6 wire power supply.
All the best from
Lars Clausen
You can use that with a 4 wire power supply directly, or add a single 15V AC 15VA transformer for slightly lower power consumption, and use the 6 wire power supply.
All the best from
Lars Clausen
This is all extremely interesting....so, what do these modules sound like with music?
Gary Dahl
Gary Dahl
Lars Clausen said:
Can't I wire a 6 wire psu to run without a secondary trafo or winding (I might want to add that later) ?
A couple more questions...
Lars, can you please clarify the content of your initial offer?
The modules + power supply will have DC protection, delay on turning on, etc. so I don't need to provide them myself, right?
The only things that I have to provide are a soft start circuit (if needed) and the transformer(s).
Is my understanding correct?
Lars, can you please clarify the content of your initial offer?
The modules + power supply will have DC protection, delay on turning on, etc. so I don't need to provide them myself, right?
The only things that I have to provide are a soft start circuit (if needed) and the transformer(s).
Is my understanding correct?
Anzgar: I can make a special power supply for you, where you can change from one to the other, by removing or mounting the series MOSFET.
m.parigi: Yes exactly, and of course plugs, and a nice cabinet.
All the best from
Lars
m.parigi: Yes exactly, and of course plugs, and a nice cabinet.
All the best from
Lars
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