Mullard EL84 ID - 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 26th April 2010, 08:49 AM   #1
diyAudio Member
Join Date: Feb 2010
Default Mullard EL84 ID

Hi all,

picked up a old radio at a flea market for a project, amonst other valves it
has one mullard el84, on closer inspection of this valve it is not like any other
mullard el84 i have ever seen....

It has no round hole in the plate but 3 small slits.

a halo type getter that is not on an angle,

white lettering with old style shield logo(also foreign made printed)

the etched code reads rX1 (# i think) 7D

is this a genuine mullard tube?

thanks in advance for any help in indentifying this valve,

  Reply With Quote
Old 26th April 2010, 09:55 AM   #2
diyAudio Member
Join Date: Apr 2003
Location: West Yorkshire, UK.
rX is certainly one of the Philips codes for EL84s, but although stamped Mullard it looks as though it was made in either Eindhoven or Japan. Google "Philips factory valve codes" and you will find the list.
  Reply With Quote
Old 26th April 2010, 12:35 PM   #3
diyAudio Member
Ty_Bower's Avatar
Join Date: Mar 2007
Location: Newark, DE
Look here:
Tube Classics - Philips Audio Tubes
  Reply With Quote
Old 26th April 2010, 02:20 PM   #4
diyAudio Member
Join Date: Feb 2010
Thanks for the info,

it seems to look like the first one on the web page Ty Bower has pointed out.(thank you)

1953/ 1957 hamburg factory... albeit with a different code???

the valve i have is/looks unused (will have to test) all the other valves in radio look new also.

ultra rare they say. is there any historic reason to preserve this or just use/ sell this
valve .
i assume the value is the same as any nos mullard el84 (vulgar question i know but would not wish to mislead any buyer)

regards DM
  Reply With Quote
Old 26th April 2010, 03:54 PM   #5
diyAudio Member
Join Date: Apr 2003
Location: West Yorkshire, UK.
If you're saying that the first symbol on the seecond line is like a # sign but with only one down stroke that would indicate manufacture by Siemens & Halske in Munich.
  Reply With Quote
Old 26th April 2010, 05:36 PM   #6
diyAudio Member
Join Date: Feb 2010
Thats the one!

the factory (7D) date codes are impossible to understand

but a nice vintage valve.

  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
5W EL84 drive EL84 SE Audio_idiot Tubes / Valves 31 31st May 2012 08:38 PM
Help ID this 12AX7/EL84 Console(?) Amp duganj Tubes / Valves 11 27th February 2010 03:47 PM
For Sale - 10 Mullard EL84 andyjevans Swap Meet 1 3rd January 2010 04:12 PM
The Mullard 3-3 atnaat Tubes / Valves 8 21st May 2009 01:54 AM
Mullard 3-3 Bas Horneman Tubes / Valves 32 28th February 2003 04:38 PM

New To Site? Need Help?

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