Amperex Orange Globe 12ax7 ,Brimar cv4004 - 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 25th January 2012, 08:00 AM   #1
hal1 is offline hal1  Israel
diyAudio Member
 
Join Date: Aug 2007
Default Amperex Orange Globe 12ax7 ,Brimar cv4004

Hi,

Considering that the BB's go for nearly twice what the orange globes go for, doesn't it make more sense to keep buying the Orange Globes?
What differences are there in terms of materials, production techniques, sound quality that might account for the premium price of the BB's.

How good is Brimar 12AX7 CV4004 or 12ax7?
How does this compare to the amperex? (orange globes)

cheers
  Reply With Quote
Old 25th January 2012, 08:24 AM   #2
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
I have Amperex 12AX7s with orange globes on them which clearly come from different factories. And tubes with other brands printed on them which clearly come from the same factories as some of the Amperex.

The ink on the tube doesn't really have much effect on the performance. This is stamp collecting, not electronics. Don't expect rational explanations.
__________________
You might be screaming "No, no, no" and all they hear is "Who wants cake?" Let me tell you something: They all do. They all want cake.- Wilford Brimley
  Reply With Quote
Old 25th January 2012, 09:31 AM   #3
DF96 is online now DF96  England
diyAudio Member
 
Join Date: May 2007
Both Mullard and Brimar made different versions of ECC83/12AX7/CV4004. In some circuits they may sound slightly different. In many circuits they will sound the same. Bear in mind that sample variation within one design version may exceed differences between versions. After all, these were all ECC83!

In addition, as SY says, you can buy genuine Mullards which were not made in a Mullard UK factory or not even in a Philips group factory (same for Brimar). They are genuine in the sense that Mullard printed (or had printed for them) their name on the glass. You can also buy valves made in a Mullard factory, but with other markings on the outside of the valve.

Ignore the ink on the outside. Learn about Philips group factory etch codes, as these are more informative (although they can be faked for popular/expensive valves).
  Reply With Quote
Old 25th January 2012, 01:03 PM   #4
diyAudio Member
 
Join Date: Apr 2009
Do you have photos of tubes?
__________________
tubes.rs
  Reply With Quote
Old 25th January 2012, 03:50 PM   #5
hal1 is offline hal1  Israel
diyAudio Member
 
Join Date: Aug 2007
Thanks for your responses.

Raidostar:

I'm asking befor buying.

Thanks for your help!

Last edited by hal1; 25th January 2012 at 03:52 PM.
  Reply With Quote
Old 25th January 2012, 04:49 PM   #6
diyAudio Member
 
Join Date: Apr 2009
Anyway, better to see internal construction before buying ...

Good luck!
__________________
tubes.rs
  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
Mullard boxed anode CV4004 Ecc83 M8137 pair slav Swap Meet 2 7th May 2012 02:47 PM
Looking for Brimar CV4004 Bob, W7ETA Swap Meet 0 4th March 2010 09:17 PM
Pr. Amperex 6DJ8, Orange Globes, Halo GT, $45, shipping inc franjy Swap Meet 1 30th June 2006 04:45 PM
Tianjin 300b globe and meshplate... john Tubes / Valves 0 9th September 2001 07:31 PM


New To Site? Need Help?

All times are GMT. The time now is 01:33 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