100W Ultimate Fidelity Amplifier - Page 179 - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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
Reply
 
Thread Tools Search this Thread
Old 30th December 2012, 05:01 PM   #1781
diyAudio Member
 
Join Date: Dec 2011
Location: hyderabad
hello friends plz help me in post #1755
  Reply With Quote
Old 30th December 2012, 07:06 PM   #1782
diyAudio Member
 
Join Date: Mar 2010
Location: Santiago, RS/ Brasil
Send a message via MSN to smartx21 Send a message via Skype™ to smartx21
Quote:
Originally Posted by shravanth View Post
hello friends plz help me in post #1755
Would you please refine your question?
That capacitor looks to be some sort of ground lift. Maybe someone can explain its behavior in this circuit.
__________________
Regards,
Andres
  Reply With Quote
Old 30th December 2012, 07:35 PM   #1783
44250 is offline 44250  Serbia
diyAudio Member
 
44250's Avatar
 
Join Date: Jan 2011
Location: Ugrinovci-Zemun-BELGRADE
Send a message via AIM to 44250
Exclamation pay attention

Quote:
Originally Posted by shravanth View Post
hello sir I made AX-14 amp
Is I should connect 0.1uf capacitor from power supply ground to input ground

Click the image to open in full size.

No need for any capacitors.

Almost all apex amplifiers are to be connected as on next picture:

(the SGND (signal ground) from pcb goes to input conector and from input conector it goes to power GND . that is how it goes for both(all) chanels in amplifier chases,each for it self. this is a scheme for AX12 but the same principle is used in (almost) all other APEX amplifier wireing)
Attached Images
File Type: jpg APEX 100W4R HI-FI.jpg (304.7 KB, 1043 views)
  Reply With Quote
Old 30th December 2012, 07:47 PM   #1784
diyAudio Member
 
Greg Erskine's Avatar
 
Join Date: Jan 2002
Location: Sydney/Australia
Quote:
Originally Posted by AndrewT View Post
Nazir,
follow the circuit schematic. It tells you the voltage at the base of the -IN transistor.

Look at the emitter of the +IN transistor.
Follow the DC current route through to Signal Ground (SG).

From this route all the current flows in the same direction from emitter to SG.
The emitter and every component MUST be +ve with respect to SG.

Now look at the base of the +IN and compare it to the base of -IN.
Thye voltages at these two bases should be IDENTICAL if the two transistors are IDENTICAL.

The base of +IN MUST be +ve with respect to SG.
Learn to read the schematic !!!!!!! READ !!!!!
Or C6 is incorrect. But I think we have discussed this many times in the past and because there is very little voltage across C6 it doesn't really matter. I would like to see it corrected so it can become an accurate reference for future builders.

Andrew, I think Nazir may be able to read schematics that is why he is asking for it to be checked.
__________________
Greg Erskine
  Reply With Quote
Old 2nd January 2013, 10:54 AM   #1785
diyAudio Member
 
Join Date: Dec 2011
Location: hyderabad
Quote:
Originally Posted by 44250 View Post
No need for any capacitors.

Almost all apex amplifiers are to be connected as on next picture:

(the SGND (signal ground) from pcb goes to input conector and from input conector it goes to power GND . that is how it goes for both(all) chanels in amplifier chases,each for it self. this is a scheme for AX12 but the same principle is used in (almost) all other APEX amplifier wireing)

thank you sir can u suggest any bass treble board for ax-14
  Reply With Quote
Old 2nd January 2013, 11:02 AM   #1786
Vostro is offline Vostro  South Africa
diyAudio Member
 
Vostro's Avatar
 
Join Date: May 2012
Location: Other side of the fence
Apex Tone control.
Mic, Line, EQ... Preamps
  Reply With Quote
Old 2nd January 2013, 12:38 PM   #1787
diyAudio Member
 
AUDISOUL's Avatar
 
Join Date: Dec 2008
Default need pcb help

Quote:
Originally Posted by alex mm View Post
........ I have from now a huge colection of Apex amplifier schematics and ofcourse many PCB's designed....... and another one
Alex.
Hi alex please send me pcb design of this project

My ID audisoul@yahoo.in
  Reply With Quote
Old 2nd January 2013, 01:45 PM   #1788
wiljj78 is offline wiljj78  Philippines
diyAudio Member
 
wiljj78's Avatar
 
Join Date: Mar 2012
Location: Bahrain
Default NTC 10K

Mr. Mile,

NTC 10K is not available in my place, what are the recommended value can be use instead of 10K??

Regards,
Willj78
Attached Images
File Type: jpg APEX%20Stereo%20Speaker%20Protect_0000.jpg (259.1 KB, 865 views)
  Reply With Quote
Old 3rd January 2013, 01:53 AM   #1789
diyAudio Member
 
Join Date: Oct 2009
hi apex sir,
pls clarify the 1762 post.
  Reply With Quote
Old 3rd January 2013, 08:26 AM   #1790
diyAudio Member
 
Join Date: Mar 2008
Hello,

I'm thinkig about building an AX14 amp. Any advice on how to drive it with a balanced source? can i feed a balanced signal to the differential pair in the first stage?
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Good ~100W amplifier percy Solid State 16 3rd April 2013 05:16 PM
New desined 4*100W car amplifier Whortless Car Audio 13 21st July 2011 04:39 AM
Ultimate Amplifier DF Plummer Tubes / Valves 19 23rd March 2011 02:48 AM
Ultimate amplifier glen65 Car Audio 2 19th September 2007 02:15 PM
100W Amplifier Shematic and PCB viki Solid State 2 17th October 2004 11:54 AM


New To Site? Need Help?

All times are GMT. The time now is 02:43 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2