ejtsoundsystem said:
Please, not in common view.
The reasons are:
1) I don't like the appearance of some people here, who looks like the two old mans Statler & Waldorf on the balcony of Muppet Show to criticize for kidding - after they have drink enough beers - ( DO YOU HEAR Mr. MODERATOR??? ).
2) There is in my country enough electronics who many times they copied my plans to make money with succes.
3) I make this job for living - not for hobby.
4) My plans are not so much exceptional, the only that i make well it is the correct pcb drawings and the use of first quality parts.
So, to facilitate you, please send me e-mails with your link to post you the plans privately.
Fotios
Here is my build of NCC 200 amplifiers
http://i259.photobucket.com/albums/hh290/337alant/ncc2002.jpg
http://i259.photobucket.com/albums/hh290/337alant/ncc2003.jpg
http://i259.photobucket.com/albums/hh290/337alant/ncc2001.jpg
I am building another amp case as well thats what the second transformer is for
Alan
http://i259.photobucket.com/albums/hh290/337alant/ncc2002.jpg
http://i259.photobucket.com/albums/hh290/337alant/ncc2003.jpg
http://i259.photobucket.com/albums/hh290/337alant/ncc2001.jpg
I am building another amp case as well thats what the second transformer is for
Alan
Re: Re: Yap
I've been lately extremely busy with my dayjob - I'm afraid I have to delay publishing the new amp on my web site.
Here's a quick snapshot of the YAP amp pulse response in a capacitive load.
- 10Vpp 500KHz pulse.
- 4ohm || 100nF load.
- Zoebel network is in place: 10ohm+100nF
- 0.6uH (damped by 4.7ohm) output coil.
Upper trace is real time, lower trace is delayed sweep (magnified trailing edge).
Nice amp (yours) BTW. If I would have the same talent, pacience and time to lay out PCBs as yourself I could probably save a little fortune in PCB costs.
A better photo of the finished OPS:
fotios said:
I've been lately extremely busy with my dayjob - I'm afraid I have to delay publishing the new amp on my web site.
Here's a quick snapshot of the YAP amp pulse response in a capacitive load.
- 10Vpp 500KHz pulse.
- 4ohm || 100nF load.
- Zoebel network is in place: 10ohm+100nF
- 0.6uH (damped by 4.7ohm) output coil.
Upper trace is real time, lower trace is delayed sweep (magnified trailing edge).
Nice amp (yours) BTW. If I would have the same talent, pacience and time to lay out PCBs as yourself I could probably save a little fortune in PCB costs.
A better photo of the finished OPS:
Hello all, this is my piece. Originally designed DPA330 by Pavel Dudek, big thanks to him. My construction:
An externally hosted image should be here but it was not working when we last tested it.
Thanks lineup. This topology has really good performance. By reading this thread, I see many superior constructions, little bit shamy about mine 
Here´s a better wiew for you.
have a nice day
Here´s a better wiew for you.
An externally hosted image should be here but it was not working when we last tested it.
have a nice day
Dudaindc, not exactly, protection circuitry still missing. But soon will be completed, also front panel is completed and waits for assembly.
Syn 08-well done, very nice PCB. Amp looks to be stable. 2 Months ago, i tried the Alexander amp construction. Now i´m working on PCB, because original PCB looks awful, separated output stage etc..my prototype board worked very good, afer some little changes(-3dB at approx 700kHz in 6.6Ohm). I want to use it for driving the tweeters on my 2way system(nowdays completing).
Changes: in output stage the IR fets were used, Ne5532 on input. Also protection circuitry was added. Whole thing will be placed on single PCB-i hate cables..If the day had 25hours at least
greetings
Syn 08-well done, very nice PCB. Amp looks to be stable. 2 Months ago, i tried the Alexander amp construction. Now i´m working on PCB, because original PCB looks awful, separated output stage etc..my prototype board worked very good, afer some little changes(-3dB at approx 700kHz in 6.6Ohm). I want to use it for driving the tweeters on my 2way system(nowdays completing).
Changes: in output stage the IR fets were used, Ne5532 on input. Also protection circuitry was added. Whole thing will be placed on single PCB-i hate cables..If the day had 25hours at least
greetings
337alant said:
Many thanks Alan for the link!
Nice cases in very logical price! And first of all from a country near all of us the Europeans.
To all: follow this link:
http://www.modu.it
Fotios
And the rear of the NX150. Conrad heatsink, WBT RCA and binding posts. The cases had to fit a particular size (non standard), so I was limited as to what cases were available. In the end I designed them using Front Panel Express' software.
Inside the amp case (as per photo on previous page) is 1 x Aussie Amplifiers NX150 module, custom 400VA potted toroid, 2 x Mundorf 47000uF/80V caps, Borbely speaker protector and my own soft start/switch on board. Now to finish the 23W subwoofer...
Inside the amp case (as per photo on previous page) is 1 x Aussie Amplifiers NX150 module, custom 400VA potted toroid, 2 x Mundorf 47000uF/80V caps, Borbely speaker protector and my own soft start/switch on board. Now to finish the 23W subwoofer...
