Favorite Threads and Posts in "Tubes" Forum - Page 2 - 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 30th December 2009, 11:32 PM   #11
AJT is offline AJT  Philippines
diyAudio Moderator
 
AJT's Avatar
 
Join Date: May 2003
Location: Palatiw, Pasig City
Posted new P-P power amp design

6C33C-B. PP or SE ?

6L6GC AB2 Amp

Building a Aikido preamplifier

Cascode driver

My Russian SET

tony's 6LU8 push-pull power amp build
__________________
the best advertisement for a good audio design is the number of diy'ers wanting to build it after all the years....never the say so of so called gurus....
  Reply With Quote
Old 8th January 2010, 12:17 AM   #12
diyAudio Member
 
dopkomachine's Avatar
 
Join Date: Jul 2005
Location: Ontario
Send a message via MSN to dopkomachine
Here is a good selection of schematics:

http://www.tubebuilder.com

Last edited by dopkomachine; 8th January 2010 at 12:29 AM.
  Reply With Quote
Old 10th April 2010, 10:08 AM   #13
djk is offline djk
diyAudio Member
 
djk's Avatar
 
Join Date: Feb 2001
Location: USA
Server not found

Firefox can't find the server at www.tubebuilder.com.
__________________
Candidates for the Darwin Award should not read this author.
  Reply With Quote
Old 10th April 2010, 12:51 PM   #14
alecu7 is offline alecu7  Canada
diyAudio Member
 
Join Date: Mar 2010
Location: Hamilton
Quote:
Originally Posted by djk View Post
Server not found

Firefox can't find the server at www.tubebuilder.com.


Same here.
  Reply With Quote
Old 27th December 2010, 05:11 PM   #15
M Gregg is offline M Gregg  United Kingdom
diyAudio Member
 
M Gregg's Avatar
 
Join Date: Jun 2010
Location: UK
Default Loose tube bases.

This seems to work well,

Loose Tube Bases

I used clear nail varnish worked quite well on 6L6G Brimar.
Thank's Ty_Bower.

Regards
M. Gregg
__________________
What is the sound of one hand clapping?
  Reply With Quote
Old 27th December 2010, 05:36 PM   #16
diyAudio Member
 
Join Date: Jun 2010
Finger nail polish! I use that to fix tears and glue down old spiders back to the magnets as well in speakers that have seen better days, any color will work by the way. Something else that could be good for tube bases is "slow drying super glue" it can be bought at the hardware store like Ace or one of the other chains.
  Reply With Quote
Old 25th February 2011, 07:10 AM   #17
radio is offline radio  Macedonia
Banned
 
Join Date: Oct 2009
Location: Bitola MACEDONIA
Smile High End preamplifier with ECC82!

Hello!
The measurements refer to the preamplifier is given below in Scheme (Figure 1)!
Please someone let that little comment about this preamplifier, if it does as a power preamplifieramplifier.
Feedback to be about the sound and display measurements if it worked.
If someone izradijo this pretpoačalo and made some measurements and some show here (frequency response and attitude towards the second and third harmonic!!?)
Many thanks in advance!
Attached Images
File Type: png ECC802S-12AU7-ECC82-Tube-Preamplifier-Schematic.png (21.8 KB, 1605 views)
  Reply With Quote
Old 5th March 2011, 11:56 PM   #18
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Zigzagflux's thread on FFT measurements performed on his system: D/A preamp FFT measurements for review plz for persistence and methodology. Quality of all responses is also excellent.
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 2nd September 2011, 04:13 PM   #19
diyAudio Member
 
richwalters's Avatar
 
Join Date: Sep 2003
Location: Alps:Tube amp designs over 150W, SMPS guru.
SOme wondered how that that BiG 200+200W parallel p-p project is going; pic of the business end. It may look horrendous but it's in order. In all about 9 months work in evenings the 100KHz SMPS taking up alot of development time. Some wiring needs tidying up but in the most part the 750W SMPS (within square can) with dual voltage boost power supply runs as expected as do the supplementary power boards; all with hot logic switching and watchdog detection, with programmable stage USB interface.
This is systems engineering complexity, so this project isn't for first timers nor beginners as considerable RF experience is required. The power amp circuit is remarkably basic; capable of bridge mode operation but it's the safety aspect of the very low impedance power supply draws attention to protection. Many don't like SMPS in power amps supplies; the advantage of excellent regulation is a real plus for dynamics.
Some features:-
AC soft start; duff cable and brownout jerk hiccup; 360V intermediate driver stabilised B+; logic controlled auto switching B- with hi & lo power with programmed B+ droop for MI; auto cathode current monitoring (important in bridgemode); large tolerance AC operation; wideband input transformers; DC front end heater; watchdog bias and overvoltage failure protection. Channel separation guaranteed -70dB at 15KHz; hi power thd 0.1% at 200W & lo power 0.05% at 35W.
This amp represents a considerable investment in old and new concepts.

Next to come; in a few weeks time, the complete power running spec with photo.

richy
Attached Images
File Type: jpg DSC05540.JPG (905.8 KB, 1292 views)
  Reply With Quote
Old 2nd September 2011, 04:39 PM   #20
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
I am sincerely impressed!
__________________
You might be screaming "No, no, no" and all they hear is "Who wants cake?" Let me tell you something: They all do. They all want cake.- Wilford Brimley
  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
Favorite Threads and Posts in "Class D" Forum Variac Class D 9 26th September 2012 05:00 PM
Favorite Threads and Posts in "ESL's, Planars, Alternative Technologies" Forum Variac Planars & Exotics 5 13th March 2010 09:23 AM


New To Site? Need Help?

All times are GMT. The time now is 06:14 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