Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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

ST-70 with Edcor Transformers
ST-70 with Edcor Transformers
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 13th February 2018, 09:36 PM   #31
H713 is offline H713  United States
diyAudio Member
 
Join Date: Nov 2017
Location: Wisconsin
Quote:
Originally Posted by Eli Duttman View Post

As for the 6L6 family tubes, check out the 6L6GC, 7581, and KT66 datasheets.
Never realized the KT66 drew that much heater current. Hmm. Is there a reason we see more production HiFi amps with EL34s than 6L6s?
  Reply With Quote
Old 13th February 2018, 09:50 PM   #32
20to20 is offline 20to20  United States
diyAudio Member
 
Join Date: Jun 2010
Location: W-S, NC
Quote:
Originally Posted by H713 View Post
Never realized the KT66 drew that much heater current. Hmm.
.... Compared to...?
  Reply With Quote
Old 13th February 2018, 10:29 PM   #33
H713 is offline H713  United States
diyAudio Member
 
Join Date: Nov 2017
Location: Wisconsin
6L6GC, 7591.
  Reply With Quote
Old 14th February 2018, 12:26 AM   #34
20to20 is offline 20to20  United States
diyAudio Member
 
Join Date: Jun 2010
Location: W-S, NC
Ok. The thread started with plans for an ST-70 ish design. The EL34 would pull .2A each more than a 66. Good luck with your project.
  Reply With Quote
Old 14th February 2018, 01:28 AM   #35
H713 is offline H713  United States
diyAudio Member
 
Join Date: Nov 2017
Location: Wisconsin
I found this design by Jason Thorpe over on Audiokarma (really sorry to link to another forum, got to give credit to the guy though). It looks quite similar to the Mullard design though, and it uses the 10M45 current regulator. This looks a lot like what has been talked about earlier in this thread (though it uses 6L6s). Again, this is NOT my design.

This is the Audiokarma thread:
Looking for schematic for nice clean push pull 6l6 monoblock | Audiokarma Home Audio Stereo Discussion Forums
Attached Files
File Type: pdf Planned Amp - Copy.pdf (60.0 KB, 29 views)
  Reply With Quote
Old 14th February 2018, 05:36 AM   #36
Eli Duttman is offline Eli Duttman  United States
diyAudio Member
 
Join Date: Apr 2004
Location: Monroe Township, NJ
Mr. Thorpe used Mullard style circuitry along the very lines I've been talking up. There are a few details to change and nits to pick [of course ], but that's the basic signal topology to use. Jason successfully connected the LTP "tail" to ground. I want that "tail" connected to a small negative voltage, for "elbow room". Remember, PSUs are at AC ground.

The B+ topology is pretty much what we'll use. As you're finding out, there is very little new under the sun, when it comes to tubed circuitry. IMO, the big advance has been the ease with which constant current techniques can be implemented. Way back when, constant current implementation was such a PITA that nobody bothered. Solid state (SS) items, AKA "sand", frequently make good "spear carriers" for tubes.

Cross linking between "boards" is commonplace. An apology was not necessary.
__________________
Eli D.

Last edited by Eli Duttman; 14th February 2018 at 05:51 AM. Reason: grammar
  Reply With Quote

Reply


ST-70 with Edcor TransformersHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Edcor Transformers whitelabrat Tubes / Valves 23 9th September 2011 02:16 AM
EDCOR XSM 10K/10K Transformers wushuliu Swap Meet 3 15th January 2011 07:24 PM
FS: 2 Edcor CXPP100-MS-3.3K transformers rsumperl Swap Meet 1 21st October 2010 12:47 AM
Edcor Transformers Sal Brisindi Tubes / Valves 18 11th November 2007 01:08 PM
Edcor P-P Transformers wrenchone Tubes / Valves 10 30th June 2006 07:01 PM


New To Site? Need Help?

All times are GMT. The time now is 07:04 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki