Intrest Check: 120w @ 8ohm Tube Buffered LM3875 Amplifier - Page 13 - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

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 1st February 2009, 09:20 AM   #121
Luck is offline Luck  China
diyAudio Member
 
Join Date: Jul 2006
Send a message via ICQ to Luck
Hi rhysh ,
Great job!!!Do you have an output delay design in the PCB?
I means when the power on, the tube is heating,there will be a big noise signal input to LM375,it can damige the speaker easily.
  Reply With Quote
Old 1st February 2009, 11:02 AM   #122
rhysh is offline rhysh  United Kingdom
diyAudio Member
 
rhysh's Avatar
 
Join Date: Sep 2008
Location: Southampton
Send a message via MSN to rhysh
Quote:
Originally posted by Luck
Hi rhysh ,
Great job!!!Do you have an output delay design in the PCB?
I means when the power on, the tube is heating,there will be a big noise signal input to LM375,it can damige the speaker easily.

I decided to do a input delay, instead of output. This allows me to keep the board smaller by using smaller relays and to also allow people to use their own method of speaker protection if needed, as there are countless methods people may want to implament.

Rhys
  Reply With Quote
Old 1st February 2009, 01:25 PM   #123
Luck is offline Luck  China
diyAudio Member
 
Join Date: Jul 2006
Send a message via ICQ to Luck
YES,i make my preamplifier as the same way.you can see in the attached picture.i use a relay...
Attached Images
File Type: jpg srpp_pcb.jpg (64.0 KB, 502 views)
  Reply With Quote
Old 11th February 2009, 06:58 PM   #124
rhysh is offline rhysh  United Kingdom
diyAudio Member
 
rhysh's Avatar
 
Join Date: Sep 2008
Location: Southampton
Send a message via MSN to rhysh
Hi everyone, I have not forgotten about you all! PCB's are taking suprisingly long, as i have placed two other orders and got them back since i placed the order for the gainclone. I will try contacting the company, they should be here soon!
  Reply With Quote
Old 11th February 2009, 07:01 PM   #125
rhysh is offline rhysh  United Kingdom
diyAudio Member
 
rhysh's Avatar
 
Join Date: Sep 2008
Location: Southampton
Send a message via MSN to rhysh
Oh and here is the schematic.
  Reply With Quote
Old 21st February 2009, 08:43 PM   #126
Brewboy is offline Brewboy  United States
diyAudio Member
 
Join Date: Dec 2008
What's the deal, are you hogging these super cool PCB's for yourself? Actually, I am happy they have taken so long to produce, it has allowed me some time to do a lot of reading, so maybe when it does show up, it might get built correctly. Then again I'm a rookie... or maybe virgin is the correct term.
  Reply With Quote
Old 22nd February 2009, 04:06 AM   #127
billyk is offline billyk  United States
diyAudio Member
 
billyk's Avatar
 
Join Date: Oct 2005
Location: North Central Mass, USA
What's Up???
My backorders from China have been coming in for the last week or so....
Status Update please.
  Reply With Quote
Old 22nd February 2009, 07:46 AM   #128
rhysh is offline rhysh  United Kingdom
diyAudio Member
 
rhysh's Avatar
 
Join Date: Sep 2008
Location: Southampton
Send a message via MSN to rhysh
In transit to me now via fedex
  Reply With Quote
Old 23rd February 2009, 03:56 PM   #129
yan6 is offline yan6  Canada
diyAudio Member
 
Join Date: Nov 2008
Was there an updated BOM for the changes made in the power supply section ?
  Reply With Quote
Old 23rd February 2009, 05:34 PM   #130
rhysh is offline rhysh  United Kingdom
diyAudio Member
 
rhysh's Avatar
 
Join Date: Sep 2008
Location: Southampton
Send a message via MSN to rhysh
Quote:
Originally posted by yan6
Was there an updated BOM for the changes made in the power supply section ?

There will be, not got round to it yet.
  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
Intrest Check : Pretty Simple Digital Preamp / Volume Control rhysh Chip Amps 69 20th December 2008 06:14 PM
Intrest check - Kepco DC Power Supply - 48v 1500 watts owdi Swap Meet 3 5th March 2006 07:03 AM
Sanity check - designing my speaker to be 8ohm amplifier friendly. owdi Multi-Way 4 1st November 2005 10:08 PM


New To Site? Need Help?

All times are GMT. The time now is 02:21 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