Simple SE optimum layout for hum - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

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 15th July 2009, 09:44 AM   #1
webby is offline webby  United Kingdom
diyAudio Member
 
Join Date: Jul 2004
Location: england
Smile Simple SE optimum layout for hum

Hi All,
I have my PCB, so the Simple SE build begins.
I have a friend helping me out with both a 2D chassis template and a 3D render, I plan to share this with anyone who wants it.
I wanted some feedback on layout and dimensions please. So far I have decided on copper sheet 500 x 400mm with four folds to create a 400 x 300mm top plate, but of course this can change.
And will be using the following iron;
Edcor CXSE25-8-5K OPT.
Edcor xpwr059
Hammond 193H choke
And an Ebay Motor run cap.

After reading Morgan Jones I am trying to confirm best practice for the iron with regard to Hum and electromagnetic induction. Is layout 1 or 2 correct and are there any minimum gaps between components. I have looked at several SE builds and have seen both layouts?

Can I also ask about finishing and polishing copper sheet, do I need to lacquer to stop oxidisation?

Many thanks
Ian
  Reply With Quote
Old 15th July 2009, 11:27 AM   #2
diyAudio Member
 
Join Date: Jun 2009
Location: Berlin
We have almost identical builds planned; all the same parts, right down the list. I am still waiting for my transformers (and tube sockets) so that I can get started putting things together. I'd love to see the renderings you come up with as I'm still mulling over layout designs.
  Reply With Quote
Old 15th July 2009, 11:29 AM   #3
webby is offline webby  United Kingdom
diyAudio Member
 
Join Date: Jul 2004
Location: england
Not sure why the images didnt upload,
Try again
Cheers
Attached Images
File Type: jpg layout2.resized.jpg (19.0 KB, 777 views)
  Reply With Quote
Old 15th July 2009, 11:38 AM   #4
webby is offline webby  United Kingdom
diyAudio Member
 
Join Date: Jul 2004
Location: england
Or this option?
Thanks
Ian
Attached Images
File Type: jpg layout1.resized.jpg (19.2 KB, 701 views)
  Reply With Quote
Old 15th July 2009, 11:40 AM   #5
diyAudio Member
 
Join Date: Jan 2007
Location: Minnesota
I did mine similar to your first option. I have zero hum
  Reply With Quote
Old 15th July 2009, 11:50 AM   #6
webby is offline webby  United Kingdom
diyAudio Member
 
Join Date: Jul 2004
Location: england
That's interesting. I thought the second option would be the best method.
Having the transformer laminations pointing away from the tubes?
This is why i am confused, did you have lots of space between the iron and PCB?
Cheers
Ian
  Reply With Quote
Old 15th July 2009, 11:53 AM   #7
diyAudio Member
 
Join Date: Jan 2007
Location: Minnesota
Not really everything was pretty tight when I built it
Click the image to open in full size.

Not the best photo
  Reply With Quote
Old 15th July 2009, 12:30 PM   #8
diyAudio Member
 
tubelab.com's Avatar
 
Join Date: Jul 2005
Location: West Virginia panhandle
Mine have all been similar to your second choice except that I tend to swap the choke and the power transformer for purely asthetic reasons. I want all of the big stuff lined up across the back. I am building a Tubelab SE right now. I have all the big transformers lined up across the back. I put the motor run cap between the choke and the power transformer. Time has been scarce and this one has taken over a year to build, but it should be done in a few weeks.

I don't think that there will be much difference between either choice.
__________________
Too much power is almost enough! Turn it up till it explodes - then back up just a little.
  Reply With Quote
Old 15th July 2009, 02:38 PM   #9
rknize is offline rknize  United States
diyAudio Member
 
rknize's Avatar
 
Join Date: Feb 2009
Location: Chicagoland
Send a message via AIM to rknize Send a message via Yahoo to rknize
I'd say it's a wash and you should go with whichever is more esthetically pleasing to you. You can see my arrangement in my avatar, though the choke is under the chassis. I also considered your exact arrangement, but it was too tight for the 10x12" chassis I was considering using. You can see what it might have looked like here:

http://www.diyaudio.com/forums/showt...61#post1783961
  Reply With Quote
Old 15th July 2009, 03:01 PM   #10
webby is offline webby  United Kingdom
diyAudio Member
 
Join Date: Jul 2004
Location: england
Thanks people,
I have read lots of Simple SE threads loads of really good info, have noted your excellent SE as well Russ. I just wanted to understand the whole transformer orientation subject, its all new to me. Hum fields and beam valves best practice and how it relates to the layout of the SSE layout.
Please keep your suggestions coming.

Many Thanks George for the excellect PCB and project.
Cheers
Ian
  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
Eagle vs. Sprint-Layout for PCB design/layout hollowman Parts 11 12th January 2014 09:01 PM
TSD-15 Optimum Loading Justcallmedad Analogue Source 21 30th October 2010 03:24 PM
Simple SE Cap and layout questions??? BillEpstein Tubes / Valves 1 23rd April 2009 02:47 PM
Layout and Pcboard software... please friends, suggest me something really simple destroyer X Solid State 102 21st July 2008 01:30 PM
optimum pot value/ ubication? federico moreno Parts 4 27th June 2006 04:24 PM


New To Site? Need Help?

All times are GMT. The time now is 07:21 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