PeeCeeBee - Page 57 - 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 7th June 2013, 12:51 PM   #561
shaan is offline shaan  India
diyAudio Member
 
shaan's Avatar
 
Join Date: Mar 2009
Location: Near the Ganges
Quote:
Originally Posted by Dacz View Post
Here is my version of peeceebee...
Yo Dacz! \m/

Welcome to the thread.

The design of your peeceebee is just incredible!

All the best for the tests. May it bring pure sonic pleasure to you.

Thanks for sharing.

shaan

Last edited by shaan; 7th June 2013 at 12:57 PM.
  Reply With Quote
Old 7th June 2013, 01:05 PM   #562
Dacz is offline Dacz  Philippines
diyAudio Member
 
Dacz's Avatar
 
Join Date: May 2013
Location: Mt. Halcon
thanks LC and Shaan... hoping to finish it this weekend.. how much transformer amperage for stereo?

i have stock of MJE340-350.. can i use it for VAS?

Last edited by Dacz; 7th June 2013 at 01:19 PM.
  Reply With Quote
Old 7th June 2013, 01:25 PM   #563
shaan is offline shaan  India
diyAudio Member
 
shaan's Avatar
 
Join Date: Mar 2009
Location: Near the Ganges
Hi dacz.

Please note that the peeceebee thread focuses on the simplest VSSA config.

Please read the first post of this thread carefully. The thread topic and rules are described there.

Best to post your progress in the VSSA thread. You can find the link in the first post of this thread.

This is not a rejection, just a suggestion indicating the best place for your posts.

Thanks.
shaan

Last edited by shaan; 7th June 2013 at 01:29 PM.
  Reply With Quote
Old 7th June 2013, 01:33 PM   #564
Dacz is offline Dacz  Philippines
diyAudio Member
 
Dacz's Avatar
 
Join Date: May 2013
Location: Mt. Halcon
it is pure peeceebee.. all values are from your first post.. i just don't have bd's thats why i ask if i can use mje's.
  Reply With Quote
Old 7th June 2013, 02:37 PM   #565
PMI is offline PMI  United States
diyAudio Member
 
Join Date: Feb 2013
Location: Milwaukee, Wisconsin
Quote:
Originally Posted by Dacz View Post
thanks LC and Shaan... hoping to finish it this weekend.. how much transformer amperage for stereo?

i have stock of MJE340-350.. can i use it for VAS?
Nice layout, I like it! Not sure if you can get 60W/channel w. +/-35V DC rails, LC may have been thinking of the max voltage as specified on his schematics.

I expect to get about 40W/channel, with a transformer 25V AC (rms) secondary winding, and I am using a 250 VA transformer, which is plenty of power for my version of this amp.

I am using heatsinks rated at 0.65C/watt, which would give me a 25C worst case temperature rise at the heatsink, averaged over the surface of the heatsink, assuming good air flow over vertical fins.

In normal use, 2 8-ohm speakers, and single-room listening, 20-25W per channel is plenty, and most of that power is used for dynamic range, and not average power anyway...
  Reply With Quote
Old 7th June 2013, 02:40 PM   #566
shaan is offline shaan  India
diyAudio Member
 
shaan's Avatar
 
Join Date: Mar 2009
Location: Near the Ganges
Quote:
Originally Posted by Dacz View Post
it is pure peeceebee...
That's not the problem.

The amplifier is named VSSA(Very Simple Symmetrical Amplifier). "PeeCeeBee" is what we call our lovely boards built around the simplest version of the amplifier.

Your board is awesome and yes you can use MJEs without any problems. However, it contains parallel capacitors in the feedback node, not matching the schematic in the first post.

Please post your future progress and enquiries in the original VSSA thread. The link is in the first post of this thread. Please read it carefully.

Thank you.
  Reply With Quote
Old 7th June 2013, 02:53 PM   #567
Dacz is offline Dacz  Philippines
diyAudio Member
 
Dacz's Avatar
 
Join Date: May 2013
Location: Mt. Halcon
ok no problem..
  Reply With Quote
Old 7th June 2013, 04:19 PM   #568
diyAudio Member
 
Lazy Cat's Avatar
 
Join Date: Sep 2007
Quote:
Originally Posted by PMI View Post
Not sure if you can get 60W/channel w. +/-35V DC rails,
+/-35 V stable DC rails from SMPS will give 62 Vpp on 8 Ohm and that's exactly 60 Wrms/8 Ohm.

Not well designed PSU is another issue and can vary between 0-35 V DC.
__________________
First One VSSA

Last edited by Lazy Cat; 7th June 2013 at 04:21 PM.
  Reply With Quote
Old 7th June 2013, 04:23 PM   #569
diyAudio Member
 
Lazy Cat's Avatar
 
Join Date: Sep 2007
Quote:
Originally Posted by Dacz View Post
how much transformer amperage for stereo?
5 Aeff per channel min, so for two channels 10 Aeff min.
__________________
First One VSSA
  Reply With Quote
Old 7th June 2013, 04:36 PM   #570
Bigun is offline Bigun  Canada
diyAudio Member
 
Bigun's Avatar
 
Join Date: Jan 2009
Blog Entries: 2
Quote:
Originally Posted by shaan View Post
Bingo.

Edit: hi viewers. in case you are new to this topology, for a quick knowhow/knowwhat see my signature below.
I also offer my insights here: TGM5 - all-BJT Simple Symmetric Amplifier

you will find some information on current-stable Vbe multiplier and use of surface-mount with pcb layout. It is not the simplest design, but after reading about the nice sound of the simplest design I am thinking of making another
__________________
"The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed." Robert M Pirsig.
  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



New To Site? Need Help?

All times are GMT. The time now is 07:08 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