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Forums
4hv.org :: Forums :: General Science and Electronics
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I bought a gu-39b-1

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Luceš
Tue Jan 03 2012, 12:00AM Print
Luceš Registered Member #4108 Joined: Sun Sept 25 2011, 11:43PM
Location:
Posts: 149
I bought a gu-39b-1 awhile ago from gstube, they said they were going to mail it this janury. I have already had 2 dreams that it broke in the mail (Oh great Im loosing sleep over a vacuum tube!) does anyone know what are the chances it will survive? I'm more worried about the filament breaking than the tube getting smashed. somebody please give me some comforting information so i can sleep again sad
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The Lightning Stalker
Tue Jan 03 2012, 02:31AM
The Lightning Stalker Registered Member #4230 Joined: Sat Nov 26 2011, 05:50AM
Location: Socketville
Posts: 53
The way he's packing those, I don't think there's much chance of any breakage.
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Luceš
Tue Jan 03 2012, 02:50AM
Luceš Registered Member #4108 Joined: Sun Sept 25 2011, 11:43PM
Location:
Posts: 149
Ok good. someone with personal experience! I know this tube is nutoris for the filaments breaking under vibrations

thanks you!!!!!!!!!!!!!!!!!!
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teravolt
Tue Jan 03 2012, 04:15AM
teravolt Registered Member #195 Joined: Fri Feb 17 2006, 08:27PM
Location: Berkeley, ca.
Posts: 1111
Hi crazyivan, hears mine I have had mine for a few years. I had no problems with shipping, is it inshured. I got mine from hear

Link2

I belive. the things that you have to be carfull of are the terminals on the top of the tube and not to break them off. What do you plan to make with it? I want to make a VTTC. I have all the equipment to build it but it is a major project
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Experimentonomen
Tue Jan 03 2012, 04:28AM
Experimentonomen Registered Member #941 Joined: Sun Aug 05 2007, 10:09AM
Location: in a swedish junk pile
Posts: 497
No need to worry. I've had a 304TL survive shipping from the states to sweden, and this tube is supposedly one of the most fragile tubes ever made in terms of filaments.
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Dr. Dark Current
Tue Jan 03 2012, 11:30AM
Dr. Dark Current Registered Member #152 Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
I received a GU-39b which had one of the filaments broken, but don't know if it happened during shipping. Recently a friend received a tube with broken filament and I've heard from a lot of people that they received tubes with broken filaments. Indirectly heated tubes survive better.
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Luceš
Tue Jan 03 2012, 10:03PM
Luceš Registered Member #4108 Joined: Sun Sept 25 2011, 11:43PM
Location:
Posts: 149
Link2

Link2

The top one is my broken gu-5androids glued together) and the bottom is my functional one, the top one I think they broke in customs because there was dried blood on the packaging!

I am worried they will brake my tube! The gu5b pins look more fragile than the gu39!
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Inducktion
Wed Jan 04 2012, 12:01AM
Inducktion Registered Member #3637 Joined: Fri Jan 21 2011, 11:07PM
Location: Buffalo, NY
Posts: 1068
Why, out of curiousity, would you ever need such a big tube? The heater alone requires a transformer the size of a MOT if not bigger to heat.
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Luceš
Wed Jan 04 2012, 12:38AM
Luceš Registered Member #4108 Joined: Sun Sept 25 2011, 11:43PM
Location:
Posts: 149
This tube takes more like a welding xformer than a mot!
Why? For one awesome vttc
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