AZ1 problem: broken metal part

Richard · 6th July 2009, 03:43 AM

Hi Guys,

I have a problem with an AZ1 rectifier (ebay purchase) and am seeking some advice. It appears that the getter reserve and its attaching arm, has broken off during transport (pic attached). I’m told it has been tested prior to transport.

In a search noted that Tubelab had a similar problem with a 45.
Rattling Tube

I have checked the filament for continuity (which is fine) and also noted no continuity between both plates and plates and filament

Is it still possible to use this valve as long at the metal bits are not in contact with the plate? What would 'you do'?

Cheers,

Rich

rknize · 6th July 2009, 06:14 AM

If you can get it to rest on the bottom of the tube where it is out of the way of any electrode connections, it should work fine. Just be wary of it if you swap tubes often or move the amp around.

Ty_Bower · 6th July 2009, 12:29 PM

Sometimes these things happen. I had the getter assembly come loose in a 6SL7. I figure it is an accident waiting to happen. There's no way to shake the loose piece down to a "safe" area. Some day it WILL short a grid to plate, and bad things are going to happen.

The tube wasn't very expensive. I've just written it off.

Richard · 8th July 2009, 01:23 AM

Hi Guys,

Thank you for sharing your experiences and advice. Since i can get the part away from the plates, I'll give it a shot.

Many thanks,

Rich

chrish · 8th July 2009, 06:09 AM

I just had two similar experiences. A VR tube with exactly your problem. I fired it up in a test rig and it worked...

Next problem was some NOS Sylvania 6SN7s. One has the getter bent down so much it is about 1/2 mm from touching the top of the structure of the adjacent triode structure. I am a little wary about using it. I purchased from a reputable dealer, but figure that postage back from Australia to USA etc it was not worth complaining about. I do not have an amp that uses them (yet) to test out. Tube is in workshop a few blocks away, so no photo at the moment...

Cheers,

Chris

6th July 2009, 06:14 AM	#2
rknize All the best stuff comes from Chian diyAudio Member Join Date: Feb 2009 Location: Chicagoland	If you can get it to rest on the bottom of the tube where it is out of the way of any electrode connections, it should work fine. Just be wary of it if you swap tubes often or move the amp around. __________________ Russ http://www.knizefamily.net/russ/cate...ics/tubeaudio/

8th July 2009, 01:23 AM	#4
Richard diyAudio Member Join Date: Apr 2005 Location: Melbourne	Hi Guys, Thank you for sharing your experiences and advice. Since i can get the part away from the plates, I'll give it a shot. Many thanks, Rich __________________ "A little learning is a dangerous thing"

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6th July 2009, 12:29 PM	#3
Ty_Bower diyAudio Member Join Date: Mar 2007 Location: Newark, DE	Sometimes these things happen. I had the getter assembly come loose in a 6SL7. I figure it is an accident waiting to happen. There's no way to shake the loose piece down to a "safe" area. Some day it WILL short a grid to plate, and bad things are going to happen. The tube wasn't very expensive. I've just written it off.

8th July 2009, 06:09 AM	#5
chrish diyAudio Member Join Date: Oct 2003 Location: Sydney	I just had two similar experiences. A VR tube with exactly your problem. I fired it up in a test rig and it worked... Next problem was some NOS Sylvania 6SN7s. One has the getter bent down so much it is about 1/2 mm from touching the top of the structure of the adjacent triode structure. I am a little wary about using it. I purchased from a reputable dealer, but figure that postage back from Australia to USA etc it was not worth complaining about. I do not have an amp that uses them (yet) to test out. Tube is in workshop a few blocks away, so no photo at the moment... Cheers, Chris