|
|||||||
| Home | Forums | Rules | Articles | Store | Gallery | Blogs | Register | Donations | FAQ | Calendar | Search | Today's Posts | Mark Forums Read | Search |
| Pass Labs This forum is dedicated to Pass Labs discussion. |
  |
|
|
|
Please consider donating to help us continue to serve you.
Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving |
 |
|
|
Thread Tools | Search this Thread |
13th November 2009, 11:25 PM
|
#1 |
|
diyAudio Member
Join Date: Jun 2004
Location: Milpitas
|
The simplified schematic of J2 what I suppose to be.
Here is the simplified schematic of Firstwatt J2 that published in the owner's manual of J2.
 It says the output stage current source is no longer an "Aleph" current source, but a version of the classic "Mu Follower". But the simplified schematic of Firstwatt J2 shown just a basic circuit of SRPP(Shunt Regulate Push-Pull). Since it claimed to be a Mu Follower, I suppose the simplified schematic of Firstwatt J2 should be just like this.  At first, I guest the regulator IC in the schematic is TL431. Then the voltage drop of those two resistors will be 2.5V, it seems too high. So, I guest the regulator IC in the schematic is LM385. Last edited by wensan; 13th November 2009 at 11:44 PM. |
|
|
14th November 2009, 06:13 PM
|
#2 |
|
The one and only
Join Date: Mar 2001
|
That will work, but it is not the J2 voltage source. I am not
planning on making the circuit details public, so I suggest that you just pick a nice voltage source and go with it. 
|
|
|
|
15th November 2009, 06:31 AM
|
#3 | |
|
diyAudio Member
Join Date: Jun 2004
Location: Milpitas
|
Quote:
But if I announce this schematic not you, I think no one will have interest in it. So sad! 
|
|
|
|
|
15th November 2009, 06:58 AM
|
#4 |
|
Formerly Thanh1973
Join Date: Nov 2006
|
Sad for them, but not for you
|
|
|
|
15th November 2009, 02:07 PM
|
#6 |
|
diyAudio Member
Join Date: Aug 2007
Location: Sunny SC,USA 15 min south of Charlotte NC
|
Build it and they will come, somehow I think I've heard that before.
You certainly have my interest, keep it going. Regards, Elwood
__________________
"when you open your mind to the imposible, soon you will find the truth...." |
|
|
|
15th November 2009, 02:24 PM
|
#7 |
|
Official Court Jester
diyAudio Member
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
|
be brave .... and confident
 about lack of attention to your thread - greedy boyz like to have Papa's blessing for their usual hysteria 
__________________
my Papa is smarter than your Nelson ! tnx to  clean  thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; BAF Forum & Gallery
|
|
|
|
16th November 2009, 09:27 AM
|
#9 | |
|
diyAudio Member
Join Date: Jul 2008
|
Quote:
|
|
|
|
|
16th November 2009, 10:09 AM
|
#10 | |
|
Official Court Jester
diyAudio Member
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
|
Quote:
__________________
my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; BAF Forum & Gallery
|
|
|
|
|
| Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
| Thread Tools | Search this Thread |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| Improved/simplified X-100???? | Circlomanen | Pass Labs | 26 | 20th April 2007 04:20 PM |
| Suppose I should have introduced myself first. | J_Starner | Introductions | 2 | 19th May 2006 02:41 PM |
| Simplified FLH's? | leadbelly | Full Range | 8 | 7th February 2006 09:53 AM |
| Simplified LM3886 amp with PCB | KostasTheGreat | Chip Amps | 39 | 21st November 2004 08:26 PM |
| New To Site? | Need Help? |
| Page generated in 0.10811 seconds (77.17% PHP - 22.83% MySQL) with 11 queries |
