#26 pre amp - Page 238 - 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 24th January 2013, 12:03 PM   #2371
diyAudio Member
 
Join Date: Aug 2005
Quote:
Originally Posted by 12B4A View Post
That is a piece of elegance.
Thanks 12B4A
  Reply With Quote
Old 24th January 2013, 01:21 PM   #2372
massimo is offline massimo  Italy
diyAudio Member
 
Join Date: Dec 2002
Location: Milan, Italy
Fantastic work rclourenco, really nice. I can see a bit of Thomas Mayer's in suspension system

(I wish I had a CNC router!)
  Reply With Quote
Old 24th January 2013, 01:38 PM   #2373
diyAudio Member
 
Join Date: Aug 2005
Quote:
Originally Posted by massimo View Post
Fantastic work rclourenco, really nice. I can see a bit of Thomas Mayer's in suspension system

(I wish I had a CNC router!)
Thanks Massimo, in fact you are correct, these are Thomas suspensions.
As for the CNC, join the club, I also would love to have one, it would avoid so much trouble. Nevertheless, these fantastic plates are fabricated by Home- Schaeffer AG - Frontplatten, Front Panels, Faces Avant if you don't know them, please try, they are top german quality, and its so simple, just download their free application, design your plates (really easy), have live on the second quotation, send the produced file through the application, wait up to 10 days, and your projects will never be the same again.

sheers.

Last edited by rclourenco; 24th January 2013 at 01:40 PM.
  Reply With Quote
Old 24th January 2013, 01:53 PM   #2374
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Thanks for sharing rclourenco.
  Reply With Quote
Old 24th January 2013, 02:24 PM   #2375
massimo is offline massimo  Italy
diyAudio Member
 
Join Date: Dec 2002
Location: Milan, Italy
Just to show Merlin (as promised) what can be done with a pair of Galaxy Maggiorato enclosures.
On the top of the PS unit, pw xfrm and choke, inside two 15V/50VA xfrms for Coleman's regs. Between the xfrms 8 diodes on a yet-to-be-made pcb. Several caps (big elcaps for filaments, pp for HV) will take space inside too.
The pream hosts two Tango 160H chokes and inside the filament bias Dale's fixing hardware is contact with the front panel through an alu bar. The other two L shaped alu bars are hosting the Coleman's regs and the SSHV2 (pcbs yet-to-be-made) spreading heat on the sides and the top cover. Close to the SSHV2 regs another pcb with 10 pcs 10uF pp caps
A suspended copper subchassis will host the tube sockets.
Attached Images
File Type: jpg P1000375.JPG (162.2 KB, 359 views)
File Type: jpg P1000377.JPG (154.9 KB, 347 views)
File Type: jpg P1000378.JPG (155.8 KB, 333 views)
File Type: jpg P1000382.JPG (170.5 KB, 322 views)

Last edited by massimo; 24th January 2013 at 02:38 PM.
  Reply With Quote
Old 24th January 2013, 02:27 PM   #2376
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Nice, congrats Massimo.
  Reply With Quote
Old 24th January 2013, 02:41 PM   #2377
massimo is offline massimo  Italy
diyAudio Member
 
Join Date: Dec 2002
Location: Milan, Italy
Quote:
Originally Posted by rclourenco View Post
As for the CNC, join the club, I also would love to have one, it would avoid so much trouble. Nevertheless, these fantastic plates are fabricated by Home- Schaeffer AG - Frontplatten, Front Panels, Faces Avant if you don't know them, please try....
Yes, I know tha company, but I cannot even figure out how expensive could be such a big, thick top cover!
I cannot afford
  Reply With Quote
Old 24th January 2013, 02:50 PM   #2378
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Near Barcelona I know laser company because my Erno Borbely mono power amps are done this way, for me is the best.
  Reply With Quote
Old 24th January 2013, 06:34 PM   #2379
mogliaa is online now mogliaa  United Kingdom
diyAudio Member
 
mogliaa's Avatar
 
Join Date: Dec 2009
Location: London
Quote:
Originally Posted by rclourenco View Post
Some photos from the main chassis (PS on another one), work around filament supply with Rod Colleman boards. Cabling is Nordost teflon covered copper.
Rui,
This looks superb, absolute perfection! Well done
Ale
__________________
"A mistake is always forgivable, rarely excusable and always unacceptable. " (Robert Fripp)
http://www.bartola.co.uk/valves/
  Reply With Quote
Old 25th January 2013, 05:18 AM   #2380
diyAudio Member
 
amandarae's Avatar
 
Join Date: Oct 2004
Location: Diamond Bar, CA
Quote:
Originally Posted by Magz View Post
I have the B+, L/R filaments and remote control power all in the same umbilical, with each pair twisted and shielded. Coleman supplies have 1000uF cap at input, B+ is regulated with VR tubes in the preamp chassis, 26s have cascoded CCS plate loads. My filament supply has ~10mV of ripple when it exits the PS chassis. The pre is dead quiet.
Where do you source your chassis?

thanks!

Abe
  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 11:59 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