Brimar ECC81 - 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 7th June 2004, 11:58 AM   #1
tuathal is offline tuathal  Ireland
diyAudio Member
Join Date: Aug 2006
Default Brimar ECC81


I friend of mine who was moving abroad gave me a box of approx 100 Brimar ECC81 valves tht he picked up in a car boot sale years ago. I know practically nothing about valves but am keen to make a few circuits with them, maybe a phono preamp. Are these valves suitable? any info would be appreciated.


  Reply With Quote
Old 7th June 2004, 12:14 PM   #2
SY is offline SY  United States
On Hiatus
SY's Avatar
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 2
These are a very nice version of the 12AT7. They're probably not the best choice for a phono amp, but they'll do very well in line amps and input stages or power amps.
"You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is."
  Reply With Quote
Old 7th June 2004, 01:12 PM   #3
EC8010 is offline EC8010  United Kingdom
diyAudio Moderator Emeritus
EC8010's Avatar
Join Date: Jan 2003
Location: Near London. UK
Hey, I'd say that with a hundred of them for free, they're ideal for anything!

If you were really keen you could make an entire amplifier solely out of ECC81. It's not as linear as some valves, but it has good mutual conductance and a useful anode dissipation, so you could make an RIAA stage using them, a cathode follower line stage (if needed). Power amplifier could use common cathode input stage DC coupled to concertina phase splitter feeding six triodes per side with a 4ka-a output transformer ought to be good for 5W. A stereo amplifier would ths use about 22 ECC81, so you've plenty for a revalve. For more power, simply parallel more ECC81 in the output stage, although you'd probably need to drive them from cathode followers because of the increased Miller capacitance.
The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...
  Reply With Quote
Old 8th June 2004, 12:32 AM   #4
diyAudio Senior Member
fdegrove's Avatar
Join Date: Aug 2002
Location: Belgium

A stereo amplifier would ths use about 22 ECC81, so you've plenty for a revalve.
Not related to Tim de paravicini by any chance?

David Manley of VTL used (abused ) the AT7 extensively in phono pre's, input valves, splitters etc....

Lucky you, Brimars and a box of a hundred too...equals the lottery in my valvebook.

  Reply With Quote
Old 8th June 2004, 11:04 AM   #5
tuathal is offline tuathal  Ireland
diyAudio Member
Join Date: Aug 2006
Default phono pre for beginner

Thanks for the replys, anyone know of any websites with phono pre designs suitable for valve ameteur. How much are these valves worth?
  Reply With Quote
Old 8th June 2004, 08:41 PM   #6
Zen Mod is offline Zen Mod  Serbia
Official Court Jester
diyAudio Member
Zen Mod's Avatar
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
they're good for absolutelly nothing;
just send it here for proper disposal
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM
  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
Brimar date codes? flyinglemur Tubes / Valves 0 14th March 2008 10:45 PM
Brimar 5R4GY WANTED reMC Swap Meet 12 10th August 2007 12:48 AM
Brimar EM87 Damon_McC Tubes / Valves 2 16th May 2007 01:19 PM
Brimar EL34 Hrappur Tubes / Valves 4 30th March 2005 03:59 PM
*****50 x Brimar ECC81 Valves***** tuathal Swap Meet 0 26th July 2004 06:03 PM

New To Site? Need Help?

All times are GMT. The time now is 01:08 PM.

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