♫♪ My little cheap Circlophone© ♫♪ - Page 120 - 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 24th April 2013, 02:24 AM   #1191
abetir is offline abetir  Philippines
diyAudio Member
 
Join Date: Nov 2010
Location: Easternmost Region V
Hi! spare_parts,

I would be very glad to have a copy of *.lay file, I am also a Sprint user.
Kindly send a copy to aco.ocampo@gmail.com.

Thank You!
  Reply With Quote
Old 24th April 2013, 06:40 AM   #1192
Elvee is offline Elvee  Belgium
diyAudio Member
 
Elvee's Avatar
 
Join Date: Sep 2006
Quote:
Originally Posted by spare_parts View Post
I would like to upload the .LAY file for editing and printing with Sprint Layout 5, but DIY audio forum file upload says it's an "invalid file type". If anyone is interested, suggest a workaround to uploading files... If nothing else, I can try to create a PDF instead.
Try to "disguise" it by adding a .txt suffix after the .lay, and if it doesn't work, put it in a zip.
__________________
. .Circlophone your life !!!! . .
♫♪ My little cheap Circlophone© ♫♪
  Reply With Quote
Old 24th April 2013, 02:45 PM   #1193
diyAudio Member
 
Join Date: Oct 2006
Default Sprint Layout file revised

Also changed diode packages to TO-220
Attached Files
File Type: zip AMP CIRCLOPHONE - Copy.zip (198.1 KB, 99 views)
  Reply With Quote
Old 24th April 2013, 06:06 PM   #1194
diyAudio Member
 
terranigma's Avatar
 
Join Date: Feb 2007
Quote:
Originally Posted by spare_parts View Post
Also changed diode packages to TO-220
In my opinion those diodes must have thicker tracks at both side. Almost all current drawn by output transistors passes through these diodes. The diode at positive rail has more current swing but donated with signal level thickness track. You can do fine with only one resistors each side (1R and 0.47R), thus able to place more room for thicker tracks. Also, I would prefer to place those diodes closer to the power transistors rather than resistors.

Last edited by terranigma; 24th April 2013 at 06:08 PM.
  Reply With Quote
Old 24th April 2013, 06:39 PM   #1195
diyAudio Member
 
Join Date: Oct 2006
Thumbs up Revised again

agreed, was looking at that also... changes added one jumper.
Attached Files
File Type: zip AMP CIRCLOPHONE.zip (196.4 KB, 106 views)
  Reply With Quote
Old 24th April 2013, 06:45 PM   #1196
diyAudio Member
 
Project16's Avatar
 
Join Date: Nov 2012
Quote:
Originally Posted by spare_parts View Post
agreed, was looking at that also... changes added one jumper.
This is much better!

Regards!
  Reply With Quote
Old 24th April 2013, 07:05 PM   #1197
diyAudio Member
 
terranigma's Avatar
 
Join Date: Feb 2007
Quote:
Originally Posted by spare_parts View Post
agreed, was looking at that also... changes added one jumper.
Much better. Hope you don't forget to fix resistor values. Other things that I would consider:
* Bypass caps may be better to place to other side of fuses. Bypass caps can help for recovering nonlinear behavior of fuses if they have placed front of fuses.
* Just an idea: TO-3 metal case transistors can be fitted as an option on same layout (or alternative layout). I was working on such kind of a layout by considering Carlos' Dx super A layout's output section. You can refer to this link: Dx Blame ST together Dx Super A

Last edited by terranigma; 24th April 2013 at 07:20 PM.
  Reply With Quote
Old 27th April 2013, 02:35 AM   #1198
abetir is offline abetir  Philippines
diyAudio Member
 
Join Date: Nov 2010
Location: Easternmost Region V
Hi All!

I did my own version of the original AlexMM lay-out for the original Circlophone, lay files courtesy of spare_parts. I have eliminated the TO-39 for VAS, (this package is becoming harder to find here in my place) instead I replaced them with TO-126 type and I managed to allow a small space for a DIY heatsink on VAS. Also I made sure that I have inserted the missing 470pf on the original lay-out, replaced the smoothing capacitors with a single one and omitted the LED indicators just for simplicity of the design. I have wanted the board to become smaller in size but further modification restricts parts movement.

In case anyone will find the lay-out useful, here it is.

Thank You!
Attached Images
File Type: jpg circlomod_all.JPG (854.7 KB, 492 views)
File Type: jpg circlomod_silk.JPG (717.2 KB, 464 views)
Attached Files
File Type: pdf Circlomod_bottom_copper.pdf (73.8 KB, 90 views)
  Reply With Quote
Old 3rd May 2013, 05:12 AM   #1199
abetir is offline abetir  Philippines
diyAudio Member
 
Join Date: Nov 2010
Location: Easternmost Region V
Hi All, (again )

I just thought that following the basic elements is simply wonderful, this new lay-out is my preference. Experience suggests that a wider space for VAS heat sink is necessary and I have always read that an output coil is becoming necessary for an amp, this is the only addition not indicated in the basic schematic. Surprisingly the whole board is only a few inches bigger than Powerflux design.

Any comments is very much welcome.

Thank You!
Attached Images
File Type: jpg circlo_all_v1.4b.JPG (778.0 KB, 409 views)
  Reply With Quote
Old 3rd May 2013, 10:06 AM   #1200
diyAudio Member
 
Project16's Avatar
 
Join Date: Nov 2012
Very good drawing abetir, the superfluous is removed!

Regards!
  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
Need help with OB design - cheap, cheap, cheap djn Multi-Way 38 30th May 2010 06:26 AM
Scosche SPL meter: Cheap find with potential, or cheap junk? theAnonymous1 Everything Else 5 11th October 2006 03:40 AM
Alpine cda-9831 vs. 9833 vs. 9835 cbecker33 Car Audio 3 10th December 2004 12:47 PM


New To Site? Need Help?

All times are GMT. The time now is 11:23 AM.


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