ECC40 preamp - 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 5th November 2007, 04:57 PM   #1
diyAudio Member
 
Join Date: Jan 2005
Location: Denmark
Default ECC40 preamp

Hello

I got some NOS ECC40 at Ebay. I want to build a line/pre. amp with those tubes.

Does any have a qualified schematic? Aikido or what else?

Regards


Benny
  Reply With Quote
Old 5th November 2007, 07:08 PM   #2
diyAudio Member
 
Join Date: Sep 2003
Location: London
ECC40 is a great tube. I would use the Raleigh Audio design.

http://www.raleighaudio.com/figure_18.htm
  Reply With Quote
Old 5th November 2007, 08:58 PM   #3
diyAudio Moderator Emeritus
 
ray_moth's Avatar
 
Join Date: Jan 2004
Location: Jakarta
Can you still get B8A tube sockets?
  Reply With Quote
Old 5th November 2007, 09:16 PM   #4
diyAudio Member
 
Join Date: Sep 2003
Location: London
Yep - ebay usually has them. And ECC40s are regularly on ebay Europe.
  Reply With Quote
Old 6th November 2007, 02:24 AM   #5
aerius is offline aerius  Canada
diyAudio Member
 
Join Date: Sep 2006
Quote:
Originally posted by andyjevans
ECC40 is a great tube. I would use the Raleigh Audio design.

http://www.raleighaudio.com/figure_18.htm
Given the relatively high plate impedance of an ECC40 (around 11k), I'm not sure that a transformer output is the best idea. My ECC40 headphone amp which uses transformer coupled 12SN7 output tubes is already pretty close to the point where frequency response starts getting rolled off on the ends, and the higher output impedance of the ECC40 is only going to make that worse. (sidenote, that's why I mostly use 6BL7 output tubes now with that amp)

One quick change I'd make to the schematic is to use something like the Gary Pimm CCS and use the low impedance mu output from the CCS to drive the transformer. That'll give the full bandwidth and make things sound better.

I've found the ECC40 to be pretty amazing tube, I still don't know what it sounds like since my amp just ends up sounding like whichever output tube I happen to be using. I have half a dozen varieties of ECC40's and they all basically sound the same, the only real difference being that some are quieter and less microphonic than others.
  Reply With Quote
Old 6th November 2007, 08:53 AM   #6
diyAudio Member
 
Join Date: Sep 2003
Location: London
I've found the ECC40 to be pretty amazing tube, I still don't know what it sounds like since my amp just ends up sounding like whichever output tube I happen to be using. >>

I think it betters all those tubes like E80CC, 7026, 6N1P etc. It has particularly good treble. It was a famous European tube, used in loads of designs at one point.
  Reply With Quote
Old 6th November 2007, 08:14 PM   #7
aerius is offline aerius  Canada
diyAudio Member
 
Join Date: Sep 2006
I stumbled across the ECC40 at a local electronics surplus shop, I thought to myself "hey, these things look pretty neat, I think I'll get a few and build something". It was only after I built something that I realized how good they were, at which point I bought every last one the shop had in stock.
  Reply With Quote
Old 7th November 2007, 01:04 PM   #8
diyAudio Member
 
kstagger's Avatar
 
Join Date: Dec 2003
Location: Grand Rapids
I have a pair of Tungsram ECC40s sitting on my shelf and a pair of B8A sockets too... I've been using the EF40 lately - cheap alternative to the rising prices of EF86s...

gotta build something with those ECC40s soon...
  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
ecc40 LTP Jaap Tubes / Valves 17 23rd November 2008 12:22 PM
ECC40 driver stage for 2A3 cypher Tubes / Valves 3 24th August 2008 07:56 AM
ECC40 cascode Jaap Tubes / Valves 3 28th December 2006 09:00 AM
Can ECC40 be used in a phono stage? andyjevans Tubes / Valves 1 6th January 2006 12:33 AM
ecc40 or 76 as driver for 2A3 Jaap Tubes / Valves 3 28th May 2004 09:36 PM


New To Site? Need Help?

All times are GMT. The time now is 07:37 AM.


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