Go Back   Home > Forums > Design & Build > Construction Tips

Construction Tips Construction techniques and tips

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 28th October 2009, 09:21 PM   #1
diyAudio Member
 
Join Date: Sep 2009
Location: Stavanger (NORWAY)
Default Working with breadboards

Hello to Everyone !

I would be very interested to know if:
1) a breadboard is still the best tool to build a prototype
2) the quality of a stereo amp schema can be assessed just building one channel.
Actually my intention would be to mix the L and R signals at the input and using just one speaker to test and optimize it.
It is the first time that I try to convert a schema in a prototype, so I am very confused and unexperienced.
Building just one channel a time seems to me a much simpler approach then making all the two channels.
If the prototype channel will work then I will build another one completely identical.
Suggestions will be very much appreciated.
Thank you very much and kind regards,
gino

Last edited by ginetto61; 28th October 2009 at 09:23 PM.
  Reply With Quote
Old 28th October 2009, 09:51 PM   #2
diyAudio Member
 
nigelwright7557's Avatar
 
Join Date: Apr 2008
Location: Carlisle, England
I get along well with veroboard or stripboard.

If one amp sounds great then I cant think of a reason why it shouldnt sound good in a stereo pair.
__________________
http://www.murtonpikesystems.co.uk PCBCAD50 pcb design software.
  Reply With Quote
Old 28th October 2009, 10:52 PM   #3
diyAudio Member
 
Join Date: Sep 2009
Location: Stavanger (NORWAY)
Quote:
Originally Posted by nigelwright7557 View Post
I get along well with veroboard or stripboard..
Thank you very much indeed for your kind and helpful reply
I understand that with these boards soldering is needed
Nebertheless I have read of some issues like bad contacts with breadboards
After all soldering is much more reliable connection

If one amp sounds great then I cant think of a reason why it shouldnt sound good in a stereo pair
I think the same as you, I am a strong believer in dual mono construction
By the way I saw a lot of very good preamp and amp where the two channels are identical either they were in the same chassis or not.
I will take some veroboards then.
Thanks a lot again
Kind regards,
gino
  Reply With Quote
Old 29th October 2009, 12:37 AM   #4
diyAudio Moderator Emeritus
 
Iain McNeill's Avatar
 
Join Date: Oct 2007
Location: Santa Cruz, California
Are you referring to the "old school" breadboarding technique of screws & dish washers holding down all the connections?

I've done this in the past and it works. If you use soft wood its harder to get a reliable contact than with a harder wood. Also, this technique makes all the leads really long and so parasitic inductance and capacitance can become a problem at HF if you're not careful.

And then there's the rats nest of wires with low impedance, high voltage supplies on them. If you've never shorted out a 50,000uF cap charged to 40V before - it's quite an event.

P.S. building one channel first is definitely recommended. You learn so much on the first one - building one first saves time in the long run.
  Reply With Quote
Old 29th October 2009, 12:38 AM   #5
dangus is offline dangus  Canada
diyAudio Member
 
Join Date: May 2004
Location: Vancouver Island
It may not be critical for AF designs, but for RF there are techniques like "ugly" or "dead bug" and "Manhattan" that use a plain PCB as a ground plane.
Manhattan" style PCB Construction

Last edited by dangus; 29th October 2009 at 12:44 AM.
  Reply With Quote
Old 29th October 2009, 01:00 AM   #6
diyAudio Moderator Emeritus
 
Iain McNeill's Avatar
 
Join Date: Oct 2007
Location: Santa Cruz, California
Like Nigel Wright, here's how I do it.
Attached Images
File Type: jpg top.JPG (38.9 KB, 160 views)
File Type: jpg bottom.JPG (52.1 KB, 158 views)
  Reply With Quote
Old 29th October 2009, 05:15 PM   #7
diyAudio Member
 
Join Date: Sep 2009
Location: Stavanger (NORWAY)
[QUOTE=Iain McNeill;1963895]Are you referring to the "old school" breadboarding technique of screws & dish washers holding down all the connections? I've done this in the past and it works. If you use soft wood its harder to get a reliable contact than with a harder wood

Good evening !
I am referring to something like this one
http://www.robotroom.com/Joystick/Breadboard.jpg
There are clips to make contacts

Also, this technique makes all the leads really long and so parasitic inductance and capacitance can become a problem at HF if you're not careful.
And then there's the rats nest of wires with low impedance, high voltage supplies on them.
If you've never shorted out a 50,000uF cap charged to 40V before - it's quite an event

To be more precise I intend to experiment a solid state line stage
60V single supply rails ... 470uF of capacitance max on the board
A very simple line stage

P.S. building one channel first is definitely recommended.
You learn so much on the first one - building one first saves time in the long run

Thank you very much for your kind and valuable advice.
Honestly I thought it were much easier, just two bjts per channel ...
I should pass to a only one bjt per channel ... if only I found a suitable schematic ...

Thanks again and kind regards,
gino
  Reply With Quote
Old 29th October 2009, 05:46 PM   #8
diyAudio Member
 
Join Date: Sep 2009
Location: Stavanger (NORWAY)
Quote:
Originally Posted by Iain McNeill View Post
Like Nigel Wright, here's how I do it.
Very nice work !
I am very beginner nevertheless the idea of implementing a project is very exciting to me
It would be the first time I make something
I modded some amps in the past, with debatable results
Kind regards,
gino
  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
WTB Krell KSA Mk2- working or non working Jozua Swap Meet 0 20th March 2006 11:14 AM
sub amp not working felzi Chip Amps 0 28th July 2005 05:29 AM
Anyone ever use solderless breadboards for circuit testing? darkmoebius Chip Amps 3 3rd March 2004 11:51 PM
Where can I get good breadboards ? russbryant Pass Labs 1 5th February 2003 02:56 AM
Tortilla breadboards dice45 Parts 4 4th May 2002 02:58 AM


New To Site? Need Help?

All times are GMT. The time now is 03:15 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