Has anyone tried 2 x 6550 100W amp? - 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 28th January 2007, 04:59 AM   #1
diyAudio Member
 
Join Date: Mar 2006
Location: sdf
Default does anyone try 2x6550 100w amp ?

base on the 'principles of power' book by kevin o'conner, there is one schematic just using 2x6550 tubes & 1x12AX7 output 100W !

is this possibe??

anyone try this ?

cal
__________________
be tube
  Reply With Quote
Old 28th January 2007, 12:27 PM   #2
diyAudio Member
 
mississippi's Avatar
 
Join Date: Apr 2006
Location: holland
I do not have the schematic diagram of your amplifier, but I can get out of 2 x EL34 and an ecc82 100 watts with 900 Volts on the anode and -39V on G1. (possible with Philips and Telefunken tubes).
  Reply With Quote
Old 28th January 2007, 12:52 PM   #3
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
Yes, it's possible. Take a look at the 6550A datasheet. As it happens, I've got a 6550-based amp on hand which puts out 100W (it's an Ampex), running the output stage in pentode with about 520V on the plates and a 2200 ohm plate to plate load.
__________________
And while they may not be as strong as apes, don't lock eyes with 'em, don't do it. Puts 'em on edge. They might go into berzerker mode; come at you like a whirling dervish, all fists and elbows.
  Reply With Quote
Old 28th January 2007, 12:54 PM   #4
diyAudio Member
 
Join Date: Mar 2006
Location: sdf
how the h....you do with EL34 100W ??
the noise must be loud ? how is the sound?

have you try 2x 6550 100W on that book?

I just want to built 60w-100w amp with minimum cost!
any reccomendation? how about that 2x6550 schematic?


cal
__________________
be tube
  Reply With Quote
Old 28th January 2007, 01:02 PM   #5
diyAudio Member
 
Join Date: Nov 2002
SY

I would like to see a schematic of the Ampex or better yet please send it to me and I will give it a nice home.
  Reply With Quote
Old 28th January 2007, 01:02 PM   #6
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
Quote:
how the h....you do with EL34 100W ??
As usual, the datasheet tells all. 11k plate to plate, 750V on the plates, 400V on the screens.
__________________
And while they may not be as strong as apes, don't lock eyes with 'em, don't do it. Puts 'em on edge. They might go into berzerker mode; come at you like a whirling dervish, all fists and elbows.
  Reply With Quote
Old 28th January 2007, 01:05 PM   #7
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
Quote:
Originally posted by burnedfingers
SY

I would like to see a schematic of the Ampex or better yet please send it to me and I will give it a nice home.
I'd like to see it myself. I can't locate any info about this amp.

From what I understand, Ampex power amps are collectors' items; I wish I knew that before I disassembled the twin of this amp to provide iron and chassis for my big triode amp. I'm tempted to eBay the intact one.
__________________
And while they may not be as strong as apes, don't lock eyes with 'em, don't do it. Puts 'em on edge. They might go into berzerker mode; come at you like a whirling dervish, all fists and elbows.
  Reply With Quote
Old 28th January 2007, 01:11 PM   #8
diyAudio Member
 
Join Date: Nov 2002
SY

With your skill you could probably draw up a schematic in about 2 min or less.

If your thinking about ebaying it ...please consider your friends here first.
  Reply With Quote
Old 28th January 2007, 01:13 PM   #9
Giaime is offline Giaime  Italy
diyAudio Member
 
Giaime's Avatar
 
Join Date: Oct 2004
Send a message via MSN to Giaime
I have here an 80W 2x6550 amp. I don't have a schematic, don't know the load of the output tubes. It runs the 6550 with 570V on the anode and 320V (regulated) on the screens. ~2000uF total PSU capacitance

Click the image to open in full size.

It uses a 12pin triple triode for the audio path, the first two ones are cascaded, the last one is a cathodyne phase splitter.

An horrible circuit that sounds good

PS the 12pin triode/pentode is (I think) used as a regulator for the input stage. The screens have their own solid state one.
  Reply With Quote
Old 28th January 2007, 01:21 PM   #10
diyAudio Member
 
mississippi's Avatar
 
Join Date: Apr 2006
Location: holland
The sound of an EL34 is very good.
I also buils an amplifier with an output of 1200 watts only with EL34's.
I already put a link of this amplifier (foto's and schema) in another topic of this forum.
  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
6550 se amp Chad Tubes / Valves 3 15th September 2011 06:48 PM
6550, 6L6, or 6V6?? weinstro Tubes / Valves 2 7th March 2008 12:49 AM
2A3 v 6550 rick57 Tubes / Valves 96 9th July 2005 01:54 PM
Evolve Amps 100W+100W Stuff 4 Sale WALTER BURKHARD Swap Meet 4 8th June 2005 11:57 AM
Wad 6550 Brap Tubes / Valves 6 20th January 2004 07:54 PM


New To Site? Need Help?

All times are GMT. The time now is 02:42 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