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 Post subject: Tube Holder
PostPosted: Nov Mon 11, 2019 1:48 pm 
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Joined: Sep Thu 26, 2019 1:56 am
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Location: Peterborough, New Hampshire, 03458 USA
Here's something I came up with to hold 7 pin tubes while I'm working on a radio. It's 1" thick shipping foam with 3/4" holes drilled through it. Then I glued it to a scrap piece of foam insulation board to the bottom. The idea was to place the tubes in the same layout as the radio chassis, so I didn't have to keep track of where they went back, plus protect them.


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 Post subject: Re: Tube Holder
PostPosted: Nov Mon 11, 2019 1:54 pm 
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Joined: Dec Sun 21, 2014 6:37 am
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Location: Portland, TN, USA
Doubly good idea - keeps them from rolling off the bench and helps the memory thing that seems to be an increasing factor. :D

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 Post subject: Re: Tube Holder
PostPosted: Nov Mon 11, 2019 2:15 pm 
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Joined: Feb Tue 02, 2010 2:11 am
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Location: Essex, Maryland 21221
I really like it. 8)


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 Post subject: Re: Tube Holder
PostPosted: Nov Mon 11, 2019 2:38 pm 
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Joined: Feb Thu 28, 2019 7:48 pm
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Location: Lawrenceville, Illinois 62439
+1 - good idea.
Here's dad's field box/tube caddy from his time in the Korean War. I never thought to adapt a similar idea to the work bench.
Dan


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 Post subject: Re: Tube Holder
PostPosted: Nov Thu 14, 2019 12:06 am 
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Joined: Mar Sun 31, 2019 3:44 am
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Location: Alberta,Canada
great plan i like it


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 Post subject: Re: Tube Holder
PostPosted: Nov Thu 21, 2019 7:43 am 
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Joined: Oct Thu 18, 2007 11:34 am
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Location: Port Orchard, Wa 98366
You could also use the hard foam for holding radio parts like transistors, resistors, Caps. Especially when assembling parts needed for a project or kit.

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 Post subject: Re: Tube Holder
PostPosted: Nov Thu 21, 2019 8:15 am 
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WoodchuckTN wrote:
helps the memory thing that seems to be an increasing factor. :D

Decreasing... :wink:

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 Post subject: Re: Tube Holder
PostPosted: Nov Fri 22, 2019 6:15 pm 
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Location: Morristown, N.J.
You've got to be careful in which foam to use if you are working with solid state parts. Some of that foam will blow up parts with high levels of static electricity. As I recall the white foam in the OP's photo does not hold a charge so its perfectly safe. As winter is arriving so too is the static electricity.

I like the idea and might even drill out some of that packing foam cluttering my attic. Forstner bits should work well in drilling.

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 Post subject: Re: Tube Holder
PostPosted: Nov Fri 22, 2019 7:29 pm 
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There is anti-static foam and Bubble wrap that are pink or Black. You can also use an anti-static wrist strap.
The electronic parts that were Government issued were always in a silver colored tyvek on the outside and black on the inside.
Yet we didn't have anti-static Akro-mils storage. The plastic bins didn't seem to be a problem though, and we had Hundreds of thousands parts.

We did use Anti-static work benches. And had Anti-static wrist straps, I think the benches also had Blue work mats on the work area.
We also had to apply an anti-static floor polish. We had door floor mats that were very sticky we had to walk over to get rid of dirt and dust.
They were sandwich layered, so when the top one was dirty we could peel it off and have a fresh sticky mat under.

Yes Static could be a problem like you said, during the winter months. We also had ION Generators to reduce static.

But for the Hobbiest Most of the time the static sensitive parts were FET's CMOS chips and even resistors and capacitors could be punctured from static.

But I'm preaching to the choir.
As long as you are aware of static sensitive parts and have conductive foam and even conductive plastic to use, there should be minimal concern.
But for regular parts for tube type applications it wouldn't be of a concern.

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 Post subject: Re: Tube Holder
PostPosted: Nov Sat 23, 2019 6:13 pm 
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I had to smile when I read your comment about "preaching to the choir". When we started putting computer techs through classes on ESD procedures back in 1973, there wasn't a choir to preach to, in fact it was hard to convince them static was a problem. For years some would only wear a wrist-strap, etc. when the boss was around. Same happened with transient voltage devices. I suppose it was the same when scientists discovered bacteria and other microorganisms...

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