Commercial Gainclone kit- building instructions - Page 152 - diyAudio
Go Back   Home > Forums > Commercial Sector > Vendor Forums > Audio Sector

Audio Sector Kits & PC boards from AudioSector

Reply
 
Thread Tools Search this Thread
Old 18th January 2012, 05:26 PM   #1511
Marra is offline Marra  United Kingdom
diyAudio Member
 
Join Date: Nov 2009
Location: Near Lincoln
I take you recommend an input cap Andrew?
  Reply With Quote
Old 18th January 2012, 07:43 PM   #1512
diyAudio Member
 
Peter Daniel's Avatar
 
Join Date: Jul 2002
Location: Toronto, Canada
Send a message via AIM to Peter Daniel
Why would anybody suggest input caps if those voltages are only with attenuator and without any source connected yet? The input caps are needed in case the source producing the offset. I'm not familiar with LDR, but I don't think it's adding any offset?

Is it passable? How much offset do you read at normal listening levels? If you won't be exceeding 80mV or so, I would say it is passable. Otherwise you need NFB cap, not an input cap.
__________________
www.audiosector.com
“Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC
  Reply With Quote
Old 18th January 2012, 08:01 PM   #1513
Marra is offline Marra  United Kingdom
diyAudio Member
 
Join Date: Nov 2009
Location: Near Lincoln
Thanks for the response Peter. I connected the integrated GainClone to my cd player and a pair of 4" Tandy speakers and it plays music; spent the last hour listening to J J Cale live. I never thought to check the dc when listening; I take it thats what you meant? I'll listen again tomorrow.
  Reply With Quote
Old 18th January 2012, 08:37 PM   #1514
diyAudio Member
 
Peter Daniel's Avatar
 
Join Date: Jul 2002
Location: Toronto, Canada
Send a message via AIM to Peter Daniel
Yes, check the offset again with the source connected
__________________
www.audiosector.com
“Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC
  Reply With Quote
Old 19th January 2012, 07:08 PM   #1515
Marra is offline Marra  United Kingdom
diyAudio Member
 
Join Date: Nov 2009
Location: Near Lincoln
A couple of photo's. I won't get chance to listen until tomorrow and check offset dc.

Click the image to open in full size.

Click the image to open in full size.
  Reply With Quote
Old 20th January 2012, 11:08 AM   #1516
Marra is offline Marra  United Kingdom
diyAudio Member
 
Join Date: Nov 2009
Location: Near Lincoln
Tried it out this morning and with the cd player and an old pair of speakers connected dc offset maxs out at 38mv on one channel and 46mv on the other. I've been listening to music for the past two hours and nothing overheats and sounds good too even through a crappy pair of 4" drivers.
  Reply With Quote
Old 20th January 2012, 11:22 AM   #1517
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
What is the assembly just below the in/out RCAs?
__________________
regards Andrew T.
  Reply With Quote
Old 20th January 2012, 03:06 PM   #1518
diyAudio Member
 
Peter Daniel's Avatar
 
Join Date: Jul 2002
Location: Toronto, Canada
Send a message via AIM to Peter Daniel
Quote:
Originally Posted by Marra View Post
...dc offset maxs out at 38mv on one channel and 46mv on the other.
Those offset values are perfectly fine.
__________________
www.audiosector.com
“Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC
  Reply With Quote
Old 20th January 2012, 03:56 PM   #1519
Marra is offline Marra  United Kingdom
diyAudio Member
 
Join Date: Nov 2009
Location: Near Lincoln
Quote:
Originally Posted by AndrewT View Post
What is the assembly just below the in/out RCAs?
Thats the Optivol LDR volume control[pcb's courtesy of dvbprojekt; unfortunately no longer available] with a Bib reg to its left.
  Reply With Quote
Old 24th January 2012, 07:12 PM   #1520
Marra is offline Marra  United Kingdom
diyAudio Member
 
Join Date: Nov 2009
Location: Near Lincoln
Would 0.47R be ok for the output resistors?
  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
Commercial complete Gainclone kit for a beginner? gychang Chip Amps 365 4th October 2011 08:19 AM


New To Site? Need Help?

All times are GMT. The time now is 01:32 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