SEPP design is it better then conventional PP - 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 26th May 2003, 01:32 PM   #1
diyAudio Member
 
Join Date: Apr 2003
Location: Israel
Default SEPP design is it better then conventional PP

Hello everyone,

I was considering building something along the line of this SEPP design.
What do you think would be the advantage of this topology over conventional push pull, if any.


http://www.geocities.co.jp/MusicHall.../6AN5SEP2.html

Thanks

Glass_painter
  Reply With Quote
Old 26th May 2003, 02:14 PM   #2
diyAudio Senior Member
 
fdegrove's Avatar
 
Join Date: Aug 2002
Location: Belgium
Default SEPP

Hi,

Quote:
What do you think would be the advantage of this topology over conventional push pull, if any.
Single Ended Push Pull (SEPP).
In SEPP the valves are lined up in series with respect to the DC standing current.
Signal input is to the lower valves which feeds an inverted signal to the grid of the upper one from its anode. The output is taken from the cathode of the upper valve (hence the low output impedance).
The net result is more power than for a straight single ended design, very low distortion, with a very low output impedance. This low output impedance is one of the keys to the amplifiers success - effectively 1/4 that of a classical push-pull arrangement as the valves are in parallel not series, with respect to output - and this allows the speakers to be driven effortlessly giving a crisp sound and good bass.

My own amps use this topology and I obviously like what it does.

Cheers,
__________________
Frank
  Reply With Quote
Old 26th May 2003, 02:35 PM   #3
diyAudio Member
 
Brett's Avatar
 
Join Date: Jan 2002
Default Not neccessarily

Quote:
Originally posted by Glass_painter
Hello everyone,

I was considering building something along the line of this SEPP design.
What do you think would be the advantage of this topology over conventional push pull, if any.


http://www.geocities.co.jp/MusicHall.../6AN5SEP2.html

Thanks

Glass_painter
I just want to say, try it and see for yourself. I have a much simpler design by another member here (moronix) I can email you if you'd like in a 20k PDF.

As to being better than PP, depends entirely upon which implementation, and how well each topology is optimised in an individual case.

If you'd like to understand more about the SRPP/SEPP amplifier, please take a look at the excellent article by John Broskie at Tubecad

Cheers
  Reply With Quote
Old 26th May 2003, 06:49 PM   #4
diyAudio Member
 
Join Date: Apr 2003
Location: Israel
Default SEPP

HI,

Thanks for the info everyone.

Frank, will you be able to post your SEPP designs or schematics here?

Thanks

Glass_painter
  Reply With Quote
Old 26th May 2003, 06:59 PM   #5
diyAudio Senior Member
 
fdegrove's Avatar
 
Join Date: Aug 2002
Location: Belgium
Default SEPP.

Hi,

Quote:
Frank, will you be able to post your SEPP designs or schematics here?
It's an OTL design.
My design hasn't been published for the simple reason that I need to piece all the sketches together and put that into one readable diagram.

If you do a search here on OTL you will find a number of circuit diagrams by other people.

Or, you can once more take a look at the Tubecad site for the principles of operation.

Cheers,
__________________
Frank
  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
Anyone out there try a SEPP OTL guitar amp?? aletheian Tubes / Valves 10 14th October 2005 03:05 AM
Sepp? Tim Wyatt Tubes / Valves 4 27th April 2005 06:34 AM
High efficiency (HORN) vs Conventional design mbon Multi-Way 13 8th June 2004 11:30 AM
SEPP design any exposure? Glass_painter Tubes / Valves 1 14th May 2003 11:45 AM
SEPP for philips 800 ohm loudspeaker Aiace Tubes / Valves 3 10th February 2003 07:20 PM


New To Site? Need Help?

All times are GMT. The time now is 02:59 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