6CB5 AMP BUILD. - 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 16th March 2012, 11:39 PM   #1
tubem is offline tubem  Canada
diyAudio Member
 
Join Date: Jun 2010
Blog Entries: 1
Unhappy 6CB5 AMP BUILD.

I have just finished building a version of Thomas Mayer's 6CB5 AMP,I'm really impressed with the sound of it, as a few of my friends were amazed how well it turned out. I'll be sending pictures as soon as I figure out how to do that again,sorry.
  Reply With Quote
Old 16th March 2012, 11:45 PM   #2
diyAudio Member
 
vinylkid58's Avatar
 
Join Date: May 2005
Location: Victoria, B.C.
If your pictures are really big, just post them up here and ask a mod to re-size them.

jeff
  Reply With Quote
Old 17th March 2012, 01:29 AM   #3
tubem is offline tubem  Canada
diyAudio Member
 
Join Date: Jun 2010
Blog Entries: 1
Default 6CB5 AMP PICS

Here are the pictures
Attached Images
File Type: jpg IMG_0696.JPG (93.6 KB, 1290 views)
File Type: jpg IMG_0704.JPG (99.5 KB, 1204 views)
File Type: jpg IMG_0705.JPG (113.0 KB, 1206 views)
File Type: jpg IMG_0707.JPG (103.0 KB, 1191 views)
  Reply With Quote
Old 17th March 2012, 01:45 AM   #4
diyAudio Member
 
vinylkid58's Avatar
 
Join Date: May 2005
Location: Victoria, B.C.
Looks great! Love the shape of the 6CB5's.

How about some details?

jeff

Last edited by vinylkid58; 17th March 2012 at 02:02 AM. Reason: add text
  Reply With Quote
Old 17th March 2012, 02:21 AM   #5
diyAudio Member
 
Vinylsavor's Avatar
 
Join Date: Feb 2002
Location: Lindau
Hi!

Nice amp! Congratulations! I'm glad to read that you like the sound!
Those ST-shape 6CB5 look great. These are quite difficult to find actually, while the straight glass 6CB5A is very common.

Best regards

Thomas
__________________
http://vinylsavor.blogspot.com/
  Reply With Quote
Old 17th March 2012, 02:38 AM   #6
diyAudio Member
 
Join Date: Nov 2007
I had the pleasure of listening to this amplifier for a couple hours last night on my recently completed Tang Band 1772 speakers. All I can say is WOW this thing sounds AMAZING!!!
Great job Jim on the build and thanks Thomas for a great design! The problem now is that I'm spoiled and I WANT ONE!!! lol This is definitely the "cure for the common amp"!!

Larry
  Reply With Quote
Old 17th March 2012, 02:54 AM   #7
diyAudio Member
 
Vinylsavor's Avatar
 
Join Date: Feb 2002
Location: Lindau
Hi Jeff,

Quote:
Originally Posted by vinylkid58 View Post
How about some details?
You can find the schematics for 6CB5A amps on my blog. Click on the label 6CB5A for all posts related to this tube. The amp looks like the RC coupled version. There is also an interstage transformer coupled one which is a bit more sophisticated. Don't hesitate to ask me if you have any questions. I can also provide parts if you have difficulties to find what is needed.

Best regards

Thomas
__________________
http://vinylsavor.blogspot.com/
  Reply With Quote
Old 17th March 2012, 02:55 AM   #8
diyAudio Member
 
Vinylsavor's Avatar
 
Join Date: Feb 2002
Location: Lindau
Hi Larry

Quote:
Originally Posted by larryldspkr View Post
The problem now is that I'm spoiled and I WANT ONE!!!
That 'problem' is easily fixable

Thomas
__________________
http://vinylsavor.blogspot.com/
  Reply With Quote
Old 17th March 2012, 03:40 AM   #9
diyAudio Member
 
vinylkid58's Avatar
 
Join Date: May 2005
Location: Victoria, B.C.
Thanks Thomas.

jeff
  Reply With Quote
Old 17th March 2012, 05:01 AM   #10
tubem is offline tubem  Canada
diyAudio Member
 
Join Date: Jun 2010
Blog Entries: 1
Default 6CB5 RC VERSION

Yes Thomas is right, it is the RC version which simply means it is capacitor coupled to the 6CB5 instead of the interstage transformer, this is the lower cost version, but not in all respects the power supply is a little more involved in that it has two pie filter sections with three banks of filtering all bypassed by quality mpp caps. The plate voltage on the 6CB5'S is 400v @70ma each, the 6N7'S are at 200v. All wiring is point to point with connections as short as possible, the actual chassis size is 17''x10''x3'' and it weighs approx 50lbs. I can tell you the extra choke and filtering is well worth it because this amp is dead quiet and that really also impressed everyone at the amps debut Thursday night. Oh and yes the old st shape 6CB5 are rare but I'm fortunate to have a dozen of them and I'll be looking for more, I'ts funny I had these tubes probably 15 years and never would have done anything with them had I not seen Thomas's blog so thank you Thomas!

Last edited by tubem; 17th March 2012 at 05:10 AM.
  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
Uses for Cheapo 6CB5 wrenchone Tubes / Valves 27 17th April 2011 11:35 PM
Modify & build out (2) Western Electric 300B / 2A3 Hammond monoblock amps & UTC LS-5 quality sound Tubes / Valves 0 9th May 2009 03:59 PM
Build a Loud, Simple & Cheap amp for a friend EWorkshop1708 Car Audio 5 19th April 2008 04:53 PM
Want to build car amp to run a couple of 12" subs menaztricks Chip Amps 10 5th November 2005 04:39 PM
Build or buy? Logitech Z-680 & College student donga Multi-Way 3 19th August 2004 08:09 PM


New To Site? Need Help?

All times are GMT. The time now is 10:58 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