Loose pin on a JJ 300B

jim · 29th December 2010, 10:26 AM

Hi,

On one of my JJ 300B's there is a loose pin. (see pics)
Any idea how to fix this?

Thanks,
Jim

316a · 29th December 2010, 12:09 PM

Quote:

Originally Posted by jim

Hi,

On one of my JJ 300B's there is a loose pin. (see pics)
Any idea how to fix this?

Thanks,
Jim

Insert into socket and don't worry about it . Fix the issue with a new 300B once this one goes bad

316A

kevinkr · 29th December 2010, 03:03 PM

If you must do anything a dab of epoxy is about all you can do.. 316a has a good point as well.

sampleaccurate · 29th December 2010, 03:32 PM

Don't listen to the above posts.

First you must remove the base of the tube. Using a pair of pliers to grip the base, hold the tube tightly and rotate the base until it comes off. This may require some amount of force but don't be concerned.

Once the tube shatters into a million pieces from the unsuccessful attempt to remove the base order a new tube.

kevinkr · 29th December 2010, 03:49 PM

Quote:

Originally Posted by sampleaccurate

Don't listen to the above posts.

First you must remove the base of the tube. Using a pair of pliers to grip the base, hold the tube tightly and rotate the base until it comes off. This may require some amount of force but don't be concerned.

Once the tube shatters into a million pieces from the unsuccessful attempt to remove the base order a new tube.

antiquekid3 · 29th December 2010, 10:45 PM

No, no...get some nichrome wire and melt the glass at the base. Then get a new base, hot glue it back together, and hope it works!

But really, some superglue right at the base of the pin should work just fine. That's how I've fixed several tube pins, at least.

Kyle

jim · 30th December 2010, 06:12 AM

Funny guys!

I think I'll take the 300B to sealing & epoxy specialists at work and see what they can do.

29th December 2010, 03:03 PM	#3
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	If you must do anything a dab of epoxy is about all you can do.. 316a has a good point as well. __________________ "Extraordinary claims require extraordinary evidence." - Carl Sagan

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
FS: JJ 300B Matched Unused	eeyore	Swap Meet	0	10th January 2009 11:24 PM
Sourcing JJ 300B tubes	zigzagflux	Tubes / Valves	3	24th May 2008 05:02 PM
Min 9-pin or 7-pin sockets to fit octal-sized holes?	ray_moth	Tubes / Valves	8	1st January 2008 05:15 PM
New production Tesla KT88 and 300B not JJ	kgbamps	Swap Meet	0	25th January 2004 04:12 AM
JJ Tesla ECC99 as a driver for 300B-2A3	konstantin	Tubes / Valves	6	1st July 2003 08:43 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


	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

29th December 2010, 03:32 PM	#4
sampleaccurate diyAudio Member Join Date: Mar 2010	Don't listen to the above posts. First you must remove the base of the tube. Using a pair of pliers to grip the base, hold the tube tightly and rotate the base until it comes off. This may require some amount of force but don't be concerned. Once the tube shatters into a million pieces from the unsuccessful attempt to remove the base order a new tube.

29th December 2010, 10:45 PM	#6
antiquekid3 diyAudio Member Join Date: Feb 2010 Location: Alabama	No, no...get some nichrome wire and melt the glass at the base. Then get a new base, hot glue it back together, and hope it works! But really, some superglue right at the base of the pin should work just fine. That's how I've fixed several tube pins, at least. Kyle

30th December 2010, 06:12 AM	#7
jim diyAudio Member Join Date: Jan 2002 Location: Leopoldsburg - Belgium	Funny guys! I think I'll take the 300B to sealing & epoxy specialists at work and see what they can do.