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Old 30th January 2006, 03:00 PM   #1
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Default look what I found this weekend!

I was cleaning out some of my grandfathers stuff this weekend and found about ten boxes of tubes! Lots of different stuff. 12ax7 12au7 6l6 813 are the only ones I can remember off hand. A few cool looking tubes with mercury in them. I am not sure what they are. Rectifiers? Then I found some really big ones. Three 4 1000a's a 4 400a and four 4 250a. Anyway I have always wanted to build a tube amp. So no I have no reason not to Here is a pic. from one box.
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Old 30th January 2006, 04:18 PM   #2
6h5c is offline 6h5c  Netherlands
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You are a lucky ****!

I'm jealous This is like finding a treasure with an old map

The ones with mercury are most likely rectifiers. Be careful with them, both mechanically and electrically!


Regards,

Ray.
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Old 30th January 2006, 04:35 PM   #3
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Congratulations with your find

Mercury rectifiers, I think I read some place the they should be kept vertical for a couple of days before applying voltage to them..not sure why, maybe the mercury in the wrong place could make a short between anode and cathode?
Anyone, please straight me out here.
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Old 30th January 2006, 07:52 PM   #4
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Quote:
Originally posted by Peter M.

Mercury rectifiers, I think I read some place the they should be kept vertical for a couple of days before applying voltage to them..not sure why, maybe the mercury in the wrong place could make a short between anode and cathode?
Anyone, please straight me out here.
Sort of - they need to be run on filaments only for a while (the interval varies from data-sheet to data-sheet). I reckon 15 mins to 1/2 hour should be fine. And yes, it is to make sure that there are no blobs of mercury to cause a short.

Regards,
Pete
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Old 30th January 2006, 07:58 PM   #5
beamnet is offline beamnet  Netherlands
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You could select a few tubes to make an amp, sell the rest to us for cheap and use the money to buy transformers and stuff!

Bas
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Old 30th January 2006, 08:12 PM   #6
poobah is offline poobah  United States
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That's very nice... now, I hate you.

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Old 30th January 2006, 09:01 PM   #7
SHiFTY is offline SHiFTY  New Zealand
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Cool!

Post a list of all the tubes here and someone will be able to tell you what to build
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Old 30th January 2006, 09:17 PM   #8
poobah is offline poobah  United States
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All of those tubes are very hazardous to the environment... send them to me and I will take care of them for you...

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Old 30th January 2006, 09:39 PM   #9
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All of those tubes are very hazardous to the environment... send them to me and I will take care of them for you...


I'll go one better than Rob. I'll pay postage and give you a few dollars to boot.
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Old 30th January 2006, 09:52 PM   #10
poobah is offline poobah  United States
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You're a dog Joe... I like dogs... but, you're still a dog!

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