Tube dropping - Help?

fauxpas · 2nd December 2007, 04:32 AM

OK, I'm listening away at lowish volume and notice the right channel is a little low, so I ignore it thinking it may be the way Jose Felliciano is recorded, I ain't heard him in a while. I get up to walk out and make a coffee and notice one tube not lit at all and it's the furthest right tube in this pic.

So I swap the two on that channel around and the suspect tube lights up for a few seconds then dies, so it's the tube? Not the socket?

I then change the tube to the furthest left on the left channel and it plays fine. When I did this last change, I swapped the speakers back to 4ohm taps from the 8ohm taps.

Could this have been the issue? Or is the tube stuffed? It is the only one with brown marks on the top of the tube and discolouration of the metal inside.

DigitalJunkie · 2nd December 2007, 05:06 AM

It could be a loose connection between the tube pin,and the little wire that comes out of the glass.
If you have a soldering iron,try heating the filament pins (or all of them,heck) and maybe apply a bit of solder,if you like.

Or,maybe the filament wire is broken/loose inside the tube,if so it's stuffed.

2nd December 2007, 04:32 AM	#1
fauxpas diyAudio Member Join Date: Nov 2007	Tube dropping - Help? OK, I'm listening away at lowish volume and notice the right channel is a little low, so I ignore it thinking it may be the way Jose Felliciano is recorded, I ain't heard him in a while. I get up to walk out and make a coffee and notice one tube not lit at all and it's the furthest right tube in this pic. So I swap the two on that channel around and the suspect tube lights up for a few seconds then dies, so it's the tube? Not the socket? I then change the tube to the furthest left on the left channel and it plays fine. When I did this last change, I swapped the speakers back to 4ohm taps from the 8ohm taps. Could this have been the issue? Or is the tube stuffed? It is the only one with brown marks on the top of the tube and discolouration of the metal inside.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
PSU - dropping resistors?	AndrewF	Tubes / Valves	4	27th February 2008 08:58 AM
Router cutter dropping!	dnsey	Multi-Way	16	11th July 2006 01:40 PM
Why is my MOSFET dropping so much voltage?	arnoldc	Power Supplies	19	21st April 2006 07:52 AM
I feel like dropping the puck, so I will.	KBK	Solid State	14	18th November 2005 07:38 PM
Dropping Speakers	NicolasGaal	Multi-Way	5	21st January 2004 10:49 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read

2nd December 2007, 05:06 AM	#2
DigitalJunkie diyAudio Member Join Date: Apr 2003 Location: Portland,Oregon Blog Entries: 4	It could be a loose connection between the tube pin,and the little wire that comes out of the glass. If you have a soldering iron,try heating the filament pins (or all of them,heck) and maybe apply a bit of solder,if you like. Or,maybe the filament wire is broken/loose inside the tube,if so it's stuffed.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)