gm70 driver tube tests - Page 11 - 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 30th January 2013, 09:39 PM   #101
diyAudio Member
 
Join Date: Oct 2010
Location: se england
I meant 6j11p, had a look around and they seem to be the same thing. They are listed as an ef180 type and to me look very like a higher dissipation (4.9w) 6j9p, with higher heater current. The anodes look just like 6j9p-e's ie tanks! If thats the case they should be well worth looking at!

Enzo
  Reply With Quote
Old 30th January 2013, 09:53 PM   #102
diyAudio Moderator Emeritus
 
Bas Horneman's Avatar
 
Join Date: Apr 2002
Location: The Netherlands
Blog Entries: 18
Indeed they are built like a tank. I've seen them listed as E280F equivalent also.

Verstuurd van mijn GT-N7000 met Tapatalk
  Reply With Quote
Old 9th May 2013, 05:54 AM   #103
diyAudio Member
 
Join Date: Apr 2004
Location: California
Default GM70 C3G/6B4G

I did try C3G triode as input/driver tube (gain about 42) to the interstage xformer but I did not like the sound, compressed, loss of dynamic, still not bad sounding for SE amp. With C3G (triode) as input and 6B4G as driver/interstage the sound is more powerful, more dynamic, the sound is satisfying.
Attached Images
File Type: jpg GM70.jpg (93.3 KB, 200 views)
__________________
Unison845
  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
6C33C tube socket for GM70 tube?? gaborbela Tubes / Valves 9 17th June 2011 05:23 AM
New GM70 tube with problem FullRangeMan Tubes / Valves 9 17th June 2010 12:10 PM
Accuton ceramic driver tests? 844 Multi-Way 4 11th May 2010 09:43 PM
New 7"driver tests ucla88 Multi-Way 4 2nd February 2007 02:01 PM
Planar driver response tests. ashok Planars & Exotics 3 28th May 2003 12:41 AM


New To Site? Need Help?

All times are GMT. The time now is 01:52 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