Changing valve damage - 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 2nd February 2012, 08:08 AM   #1
mathewf is offline mathewf  Switzerland
diyAudio Member
 
Join Date: Feb 2012
Default Changing valve damage

I tend to change my valves around in my amps fairly regurlary, particularly the power output valves (EL34s to KT88's etc). Am I likely to be shortening their life at all? I guess I'm fairly careful handling them...
  Reply With Quote
Old 2nd February 2012, 08:19 AM   #2
Doz is offline Doz  United Kingdom
diyAudio Member
 
Doz's Avatar
 
Join Date: Jul 2010
Location: Sat Down
Shortening the life of the sockets through wear and tear. As long as the valves are run within ratings, and bias checked on swapping power tubes, I can't see what harm you're doing.
__________________
"To err is human.. to make a real balls-up requires a computer"
  Reply With Quote
Old 2nd February 2012, 09:46 AM   #3
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
Why? They are not like car tyres, with uneven wear.
  Reply With Quote
Old 2nd February 2012, 10:19 AM   #4
Doz is offline Doz  United Kingdom
diyAudio Member
 
Doz's Avatar
 
Join Date: Jul 2010
Location: Sat Down
Presumably a tube rolling exercise...
__________________
"To err is human.. to make a real balls-up requires a computer"
  Reply With Quote
Old 2nd February 2012, 12:37 PM   #5
mathewf is offline mathewf  Switzerland
diyAudio Member
 
Join Date: Feb 2012
Quote:
Originally Posted by DF96 View Post
Why? They are not like car tyres, with uneven wear.
Partly to save my Mullard EL34s, also just to try stuff out... The concern was that by swapping the Mullards in and out to save them a little, I was actually shortening their lives...
  Reply With Quote
Old 2nd February 2012, 01:04 PM   #6
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
If you break them that will shorten their lives. Some modern valve sockets might not like regular changes either.
  Reply With Quote
Old 2nd February 2012, 01:14 PM   #7
diyAudio Member
 
Join Date: Jan 2012
Location: Canada
Quote:
Originally Posted by mathewf View Post
Partly to save my Mullard EL34s, also just to try stuff out... The concern was that by swapping the Mullards in and out to save them a little, I was actually shortening their lives...
It is a "Damned if you do; damned if you don't" situation. You can take out the Mullards, hang them on the wall in a frame, and look at them, it won't do them any harm, but then what is the use to having them? They won't sound good.

I kept telling my father this. He has a good wristwatch, he's retired, and he likes it but is worried about scratching said watch or knocking it about. I told him that he won't enjoy it if it is in his sock drawer because when will he want to wear it? It won't tell him what time it is nor will it do him any good in his grave. Sure he can save it for me, but use it. Make it practical and use it. If it gets damaged, it can always be repaired or replaced.

If he can't bring himself to wearing it, then get another watch and wear that one.

Granted Mullards are rare and expensive, but only you can decide how to enjoy them. Tubes are pretty strong and most times don't burn out like a filament lightbulb.

Me? I'd use them and listen to the sound they produce.
  Reply With Quote
Old 2nd February 2012, 01:31 PM   #8
M Gregg is offline M Gregg  United Kingdom
diyAudio Member
 
M Gregg's Avatar
 
Join Date: Jun 2010
Location: UK
In all honesty I think your more likely to damage them changing about tubes..
I have had tubes last for years just left alone and run as normal.
I have broken more tubes swapping and changing or moving tube amps about than through normal wear and tear.
That’s the problem with tubes on show..you keep messing with them. If they are inside an enclosure you tend to leave them alone and they last for ages.
However I like to see them as most people do…that’s the problem we like them and can’t keep our hand s off…such is the likes of us J

Mechanical damage is the problem..how many things have you dropped by accident? Don't hold them and your fine..
I would even say I tend to do more damage when I am over cautious with tubes and then get mad when one rolls off the table..

Regards
M. gregg
__________________
What is the sound of one hand clapping?

Last edited by M Gregg; 2nd February 2012 at 01:36 PM.
  Reply With Quote
Old 2nd February 2012, 01:39 PM   #9
diyAudio Member
 
Join Date: Mar 2008
Location: Santa Fe, NM
I tend to tube roll quite a bit.
And just like a tube tester, I use socket savers in my tube amps.
They also keep the bases of the tubes cooler too.

Steve
  Reply With Quote
Old 2nd February 2012, 02:48 PM   #10
diyAudio Member
 
Join Date: Aug 2010
Location: Near Eindhoven, the sanctum of the pentode. and among that other things.
Send a message via Skype™ to v4lve lover
or just sell the dam tubes and dont worry bout it buy a parametrical EQ and 2 sets of new EL34 for the money they fetched .

  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
Damage to valve amp when powered up but disconnected to speakers? Horsebox Tubes / Valves 36 28th February 2011 08:28 PM
Any thoughts on what damage I did? xbartx Tubes / Valves 13 1st January 2011 05:28 PM
Swap Shanling CD-T80 valve CD player for Quad valve equiment johnm Swap Meet 2 24th September 2009 12:15 PM
Flux Damage jkeny Parts 11 26th March 2008 04:57 PM
damage the laser? maya1 Digital Source 0 16th June 2004 06:09 PM


New To Site? Need Help?

All times are GMT. The time now is 02:10 AM.


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