Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki 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

Funky Looking 15DQ8s
Funky Looking 15DQ8s
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 29th March 2009, 06:09 AM   #11
smoking-amp is offline smoking-amp  United States
diyAudio Member
 
smoking-amp's Avatar
 
Join Date: Dec 2001
Location: Hickory, NC
Sounds like it could be a tube for George (Tubelab) to test. He could see how many watts it will draw before the bulb blows. Unless they glow a nice color at low power, then maybe VR duty or as a nightlight.
__________________
For English, press 1, For an automated representative, press 2, To stay on the line forever, press 3, To self destruct, press 4, To start over, press 5
  Reply With Quote
Old 29th March 2009, 12:02 PM   #12
ilimzn is offline ilimzn  Croatia
diyAudio Member
 
Join Date: Feb 2005
Location: Zagreb
These are probably made by Tungsram in Hungary. For some reason this sort of thing is quite common with some of their tubes (another example would be their EF80 pentodes), they are new and they seem just fine like that. I am not sure it's directly related to getter firing, but may have to do with the initial tube out-gassing or initial heater firing. Wether it's some product of the heater burn-in that radiates out from the insides onto the glass through the anode holes and looks like that, or subsequently somehow attracts the getter material, I have no idea.
  Reply With Quote
Old 29th March 2009, 12:55 PM   #13
barretter is offline barretter  United Kingdom
diyAudio Member
 
Join Date: Apr 2003
Location: West Yorkshire, UK.
I'm currently listening to an amp using a quad of E84Ls branded as "National" by Richardson but "made in Hungary" so most likely Tungsrams. They have very similar getter patches and they work just fine.
  Reply With Quote
Old 29th March 2009, 06:23 PM   #14
Alastair E is offline Alastair E  Wales
diyAudio Member
 
Alastair E's Avatar
 
Join Date: Feb 2004
Location: South Wales
Nah, Nowt wrong with those.....

Seen this many times with European tubes.....

I have a number of EF184 and EF183's that are exactly the same, and made by some Co For Mazda...The tubes I have are NOS and in their original boxes too..............
__________________
Das Beste Oder Nichts
  Reply With Quote
Old 29th March 2009, 09:21 PM   #15
wrenchone is offline wrenchone  United States
diyAudio Member
 
wrenchone's Avatar
 
Join Date: Feb 2004
Location: Silicon Valley
Thanks for the replies. I'd never seen getter distribution like that before. The 15LQ8 is nice in that it has a high voltage rating for both halves, though the triode and pentode don't have specs as impressive as, say, a 6LQ8. I'm getting infatuated with some of the triode/pentode duals floating around out there, especially the ones where the pentode is designed for video amp duty.
  Reply With Quote

Reply


Funky Looking 15DQ8sHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Class D amp, one channel ... funky. guitarcarl Class D 1 20th November 2008 09:57 PM
funky power supply audio_moksha Tubes / Valves 10 19th March 2008 04:51 AM
Funky reading 12B4A? kegger Tubes / Valves 14 13th November 2006 08:23 PM
Funky 70's SAE preamp and amp (ebay) Jason Swap Meet 0 8th April 2005 12:51 PM


New To Site? Need Help?

All times are GMT. The time now is 08:51 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio
Wiki