High gm version of 12AU7 - 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
Reply
 
Thread Tools Search this Thread
Old 17th June 2016, 01:03 PM   #1
diyAudio Member
 
ruffrecords's Avatar
 
Join Date: Jun 2007
Location: Holt, Norfolk
Default High gm version of 12AU7

Is there a tube which is basically a high gm version of a 12AU7? In other words, 12V heaters, B9A base, preferably same pin out, similar mu but higher gm.

Cheers

Ian
  Reply With Quote
Old 17th June 2016, 01:26 PM   #2
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
ECC804? Also known as 6/30L2, possibly sometimes sold as 'Mazda 6CG7'.
  Reply With Quote
Old 17th June 2016, 01:31 PM   #3
rongon is offline rongon  United States
diyAudio Member
 
rongon's Avatar
 
Join Date: Jul 2009
Location: Across the river from Rip's big old tree...
12BH7A

12FQ7 (if you can find 'em)
--
  Reply With Quote
Old 17th June 2016, 01:35 PM   #4
316a is offline 316a  England
diyAudio Member
 
316a's Avatar
 
Join Date: Dec 2002
Location: West London
Quote:
Originally Posted by ruffrecords View Post
Is there a tube which is basically a high gm version of a 12AU7? In other words, 12V heaters, B9A base, preferably same pin out, similar mu but higher gm.

Cheers

Ian
ECC99 perhaps ?

316a
  Reply With Quote
Old 17th June 2016, 01:39 PM   #5
jgf is offline jgf  United States
diyAudio Member
 
Join Date: Jan 2010
Location: PA
Quote:
Originally Posted by rongon View Post
12BH7A
Yes, then ECC99 beyond that
  Reply With Quote
Old 18th June 2016, 06:47 AM   #6
diyAudio Member
 
ruffrecords's Avatar
 
Join Date: Jun 2007
Location: Holt, Norfolk
I should also have said the same physical size as the 12AU7!

Cheers

Ian
  Reply With Quote
Old 18th June 2016, 06:53 AM   #7
diyAudio Member
 
ruffrecords's Avatar
 
Join Date: Jun 2007
Location: Holt, Norfolk
Quote:
Originally Posted by DF96 View Post
ECC804? Also known as 6/30L2, possibly sometimes sold as 'Mazda 6CG7'.
THat'sdefinitely in the right direction. Thanks.

IAn
  Reply With Quote
Old 18th June 2016, 10:17 AM   #8
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
I realise you did specify 12V heater. The ECC804 has only 6.3V heater, with a screen on pin 9.
  Reply With Quote
Old 18th June 2016, 11:34 AM   #9
45 is offline 45  Italy
diyAudio Member
 
45's Avatar
 
Join Date: Dec 2008
Location: UK
Quote:
Originally Posted by ruffrecords View Post
I should also have said the same physical size as the 12AU7!

Cheers

Ian
I would try the 6N1P-EV. It's cheap and very good. The EV version is long life. It was designed as a true low frequency voltage amplifier. It is 6.3V though with pin n.9 connected to a screen between the two halves. Amplification factor is 35 and average gm 4.5-5 ma/V at 150-180V/6-8 mA. Input capacitance is higher than 12AU7 though.

Last edited by 45; 18th June 2016 at 11:38 AM.
  Reply With Quote
Old 18th June 2016, 11:36 AM   #10
diyAudio Moderator
 
TonyTecson's Avatar
 
Join Date: May 2003
Location: Palatiw, Pasig City
6gu7
__________________
planet10 needs your help: Let's help Ruth and Dave...http://www.diyaudio.com/forums/plane...ml#post5010547[B
  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
Pioneer GM-X334 was cutting out with high musical passages (SOLVED) 96tahoe Car Audio 4 8th January 2013 02:27 AM
High(er) gm octal pentodes? dgta Tubes / Valves 19 31st January 2012 11:01 PM
Unusually high Gm Drewaudio Tubes / Valves 33 21st October 2011 01:59 AM
Aleph-X: High-Power Version Blitz Pass Labs 333 14th January 2010 09:46 AM
pair of NOS Mullard CV4003's (high end 12AU7) Glowbug Swap Meet 0 28th November 2006 12:33 AM


New To Site? Need Help?

All times are GMT. The time now is 03:20 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
Wiki