5902 amp schematics? - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs 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

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 3rd June 2005, 04:14 PM   #1
diyAudio Member
Join Date: Jun 2005
Location: ny,ny
Default 5902 amp schematics?

Hello. I'm interested in building an amp using two 5902 sub-mini tubes.
I'm having some trouble finding schematics of amps using these tubes. I would like to run them push-pull, cathode bias.
Any and all info is welcome.

  Reply With Quote
Old 5th June 2005, 11:39 AM   #2
RE 604 is offline RE 604  Germany
diyAudio Member
RE 604's Avatar
Join Date: Oct 2003
Location: Germany
Hello Anthony ,
look here :


It is single - ended , but maybe a help .
Regards , Alexander .
No reason to get excited : Jimi Hendrix .
  Reply With Quote
Old 5th June 2005, 08:41 PM   #3
RE 604 is offline RE 604  Germany
diyAudio Member
RE 604's Avatar
Join Date: Oct 2003
Location: Germany
Here is the second link :


Regards , Alexander .
No reason to get excited : Jimi Hendrix .
  Reply With Quote
Old 7th June 2005, 06:55 AM   #4
mwiebe is offline mwiebe  United States
diyAudio Member
Join Date: Apr 2004
Alexander, thanks for posting those links.

I have been using a 955 (acorn) driving a P-P 5902 triode connected to drive a Klipsch La Scala for a few years. However both driver and power tubes are battery biased, 1.2V and 6V respectively. I use the small Hammond 125C as outputs. I don't have a schematic to share but my B+ is 110V. Nice sounding amp and I've been meaning to play around a bit more with it--also try a pentoded 5902 as a driver. So by all means dive into your project.
  Reply With Quote
Old 9th November 2011, 09:16 PM   #5
diyAudio Member
arensattic's Avatar
Join Date: Mar 2006
Location: Groningen
Default 5902 push-pull amp from Italy


If I may add a link on 5902 amplifiers: there is a push-pull amplifier project posted on the "Radio di Sophie" site, run by Italian hobbyists. I have built a prototype (single channel) of Nicola del Ciotto's amplifier and it sounds good, but needs a preamp capable of providing 10V RMS output (or more).

The following document provides all information including PCB layout:


(If anyone wonders: Sophie is (or was) an Abessynian cat with impressive looks, that liked to sit on working valve radios !)

Best regards,

Aren van Waarde (aka arensattic)
Real HiFi runs hot and has only one speaker unit per audio channel.
  Reply With Quote


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
schematics help just4copy Tubes / Valves 1 6th August 2009 11:44 AM
Schematics for SFD 2 dac JC951t Digital Source 2 9th April 2008 12:36 PM
BOSE Schematics DENSO Schematics packer Car Audio 6 25th June 2007 10:55 AM
5902 subminiature audio pentode Glass_painter Tubes / Valves 9 28th November 2004 07:27 PM
SUV-78 schematics please? demons_wing Solid State 2 26th April 2004 04:11 AM

New To Site? Need Help?

All times are GMT. The time now is 01:38 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2