6J5 (Metal Tubes) ....something goes around inside - 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 27th June 2007, 04:52 AM   #1
zxx123 is offline zxx123  United States
diyAudio Member
 
Join Date: Aug 2003
Location: ca
Default 6J5 (Metal Tubes) ....something goes around inside

I bought 10 6J5s from an online site.
I feel some particles exist inside some tubes.
I don't what they are because they are metal
protected tubes.

My question is simple. Is it normal? Will these work?
Does it affect sound?

thanks.
  Reply With Quote
Old 28th June 2007, 06:32 AM   #2
diyAudio Member
 
Miles Prower's Avatar
 
Join Date: May 2005
Location: USA
Blog Entries: 6
If you have something rattling around inside the can, that's definitely not normal. I've used 6J5s, and these certainly don't have anything loose inside. Given the sturdy internal construction, there's something awfully wrong there.
__________________
There are no foxes in atheistholes
www.dolphin-hsl.com
  Reply With Quote
Old 28th June 2007, 12:59 PM   #3
diyAudio Member
 
tubelab.com's Avatar
 
Join Date: Jul 2005
Location: West Virginia panhandle
My curiosity has convinced me to dissect many types of electronic items. I have cut the top off of some metal tubes, although it was a long time ago. I have found some metal tubes that rattled also.

I wondered about the construction of metal tubes, and if it would be possible to use the metal envelope as an extra electrode, so I cut a few open. The shell is metal. Most appear to have some sort of coating on the inside of the metal jacket. There is a glass to metal seal at the bottom where the leads come through. The construction of this seal is often sloppy. One example had extra glass drips extending up into the tube along the inside surface of the tube. If this were to come loose, it could be the source of the rettling components. This should not be a concern in normal operation.

It was several years ago that I cut some metal tubes open. I have a few zillion oddball tubes, so the next time I run across a rattler, I will cut it open for a fresh look. Just to be on the safe side it may be wise to avoid using the rattlers in a direct coupled circuit where a short could be fatal to expensive parts or tubes.
__________________
Too much power is almost enough! Turn it up till it explodes - then back up just a little.
  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
Blue glass inside tubes morfic Tubes / Valves 3 24th June 2009 03:44 PM
Old metal tubes Hojvaelde Tubes / Valves 14 10th May 2009 12:30 AM


New To Site? Need Help?

All times are GMT. The time now is 01:06 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