Question regarding value of Telefunken tubes. - 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 16th February 2011, 03:59 PM   #1
diyAudio Member
 
Join Date: Nov 2003
Location: flyover country
Default Question regarding value of Telefunken tubes.

Last night I was testing some (hopefully final) xover mods to my HT column speakers (I will provide photos soon), and was using a Scott stereo integrated tube amp to drive them. However, the amp appeared to fail during testing (playing at a moderate average level with little or no apparent distortion even on peaks), so I shut down for the day. Since one output transformer had gotten quite hot and little but hum was coming out of the amp, I more or less assumed the transformer had failed for that channel (after all, the amp has to be around 50 years old).

This morning I powered the amp up again, and the problem was still there. I took a look at the 6BQ5/EL84 output tubes and saw that one was dark, so I turned the amp off again and pulled the tube. I was surprised to see that the tube had broken apart just above the socket and had no vacuum. Just to see if that was the only issue at hand, I powered the amp up briefly without the tube and played sound through it for a couple seconds. Both channels played, but the one with just the one tube was quite distorted of course. This gave me some confidence that the amp itself had survived the ordeal.

The actual tubes in the output were nearly new (probably around 100-200 hours) Telefunken 6BQ5/EL84's, of which I now have three. It occurred to me that it might make sense to put the remaining three up for sale and put some (admittedly lower quality) new manufacturer replacements in this amp. Does anybody have an idea how much nearly new gold pin Telefunken 6BQ5/EL84's might bring on Ebay, for instance?
  Reply With Quote
Old 16th February 2011, 06:46 PM   #2
diyAudio Member
 
Miniwatt's Avatar
 
Join Date: Nov 2004
Location: Den Haag
Is your Google out of order? I got plenty of hits. You could make quite some money it seems.

But isn't the getter supposed to turn white when the vacuum's gone?
  Reply With Quote
Old 16th February 2011, 07:10 PM   #3
LAJ is offline LAJ  United States
diyAudio Member
 
Join Date: Mar 2008
Location: Atlanta Ga. USA
With the situation in tubes, I would snap up all that you can.
  Reply With Quote
Old 16th February 2011, 08:21 PM   #4
diyAudio Member
 
Join Date: Nov 2003
Location: flyover country
Quote:
Is your Google out of order?
So, did you find anything definitive about their worth? What I found there were values all over the map & was hoping to get an expert opinion.

Quote:
But isn't the getter supposed to turn white when the vacuum's gone?
I noticed that in passing as I removed the fragments of the tube from the socket.

Last edited by thoriated; 16th February 2011 at 08:40 PM.
  Reply With Quote
Old 16th February 2011, 11:49 PM   #5
diyAudio Member
 
Join Date: Dec 2008
Location: Victoria, BC
There's only been one eBay auction recently for used Telefunken EL84s, as far as I can see. 5 used, tested tubes for $159.
Item #370480647154
Of course if you advertise them as NOS (like a lot of crooks selling used tubes reputedly do.......) it would be a different story.
  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
FS: Telefunken EMM801 magic eye tubes reaction Swap Meet 6 29th January 2011 07:52 PM
FS: Telefunken 12AX7 tubes xecluded Swap Meet 0 29th March 2010 01:29 AM
Some really old tubes, mostly Telefunken ilimzn Swap Meet 2 9th March 2009 03:33 PM
Telefunken tubes gianis Swap Meet 0 25th March 2008 10:58 PM
Telefunken Transformers and Tubes: $50 pjanda1 Swap Meet 3 14th December 2007 10:00 PM


New To Site? Need Help?

All times are GMT. The time now is 02:31 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