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

Audio Note P-zero
Audio Note P-zero
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
Thread Tools Search this Thread
Old 18th December 2011, 06:38 PM   #11
mayky is offline mayky  Hungary
diyAudio Member
Join Date: Mar 2005
Location: Mohács
Originally Posted by Charm View Post
Thanx. I-Zero and P-zero.
I have some russian tubes too 6Ф3П, winged logo C the original Svetlana
  Reply With Quote
Old 19th December 2011, 12:03 AM   #12
Jebem is offline Jebem  Portugal
diyAudio Member
Jebem's Avatar
Join Date: Dec 2011
Location: Lisbon
Hi Mayky,

The AN P-Zero mono blocks delivers 8 Watt each from a pair of ECL82 tubes, where the pentode sections runs in ultra linear (20% taps) push-pull output stage, and one triode section acts as input amplifier and the other triode acts as a phase splitter (but I think they use a driver transformer for this job).

So this is a simple, well understood, and widely available schematic in the internet, BUT with a few variants.
AN UK design is very specific in the way they tap the primary output transformers at 20% to connect the screen grid to get the most power and low distortion from the tubes in class AB2 (I don't think they can take 8 Watt in class AB1, so I believe they use a drivers transformer to run them into class AB2.).
Most of the transformers are tapped at 43% as this is a more common value.
The primary impedance should have a minimum of 9Kohm.
Also our own site refers to this issue before, here:
ECL82 (6BM8) PP Stereo




So, You really need the correct driver and output transformers to get the most from your tubes and reach the specified power and distortion.
I believe AN in UK will be happy to sell you the transformers and the schematics as well, I'm sure.

Also you may like to check this transformer manufacturer in UK:
  Reply With Quote
Old 27th December 2011, 06:52 PM   #13
mayky is offline mayky  Hungary
diyAudio Member
Join Date: Mar 2005
Location: Mohács
Thanx for infos.
The output transformers will do it by myself.

Here is one bobin, this is unloaded ratio. The loaded (wire DC resistance, etc) more than 9k.

This bobin is suit for M85B core, it's about 12-13 cm2
Attached Images
File Type: jpg pcl82ppcséve.JPG (41.3 KB, 246 views)
  Reply With Quote
Old 3rd May 2012, 09:23 PM   #14
mayky is offline mayky  Hungary
diyAudio Member
Join Date: Mar 2005
Location: Mohács
Well I made a test model PCL82 PP. I made some square wave test. I've got this results.
The frequencies:

100Hz, 1kHz
10 kHz, 20kHz
40 Khz, 80 kHz

My audiogenerator is not perfect, but essence is viewable
Attached Images
File Type: jpg pcl82pp.JPG (65.8 KB, 196 views)
File Type: jpg mérés.jpg (114.7 KB, 199 views)
  Reply With Quote


Audio Note P-zeroHide 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
FS: Audio Note TRANS-010; Audio Note 20H 50mA choke; Black Gate Wk "power tank" Joseph0 Swap Meet 1 24th May 2006 06:17 AM
Audio Note schematics EsE Tubes / Valves 0 22nd May 2006 11:10 PM
Audio Note AN-E upgrade? Sclalars Multi-Way 7 8th February 2006 11:42 AM
Audio Note P-2 Yurik Tubes / Valves 0 27th February 2004 12:11 AM
Audio Note Kageki vs. EAR 859 vs. Audio Innovations: The First Vortex Tubes / Valves 1 2nd February 2004 01:31 AM

New To Site? Need Help?

All times are GMT. The time now is 03:52 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio