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Old 31st Mar 2024, 4:20 pm   #1
majex45
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Default Project boxes

I needed a couple of small project boxes to make a junction box to convert 4mm plugs to bare wires. I searched everywhere without success until I spoke to a friend of a friend who is a target shooter. He said Eley ammunition comes in small plastic boxes. So I got a couple (empty) and the result is as you see.
These boxes come in two types, one with a removable lid and one with an internal drawer. Both will be useful.
I understand that some American ammunition comes in transparent boxes but my mate's friend doesn't use that.
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Old 31st Mar 2024, 5:03 pm   #2
Uncle Bulgaria
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Default Re: Project boxes

I'm surprised you couldn't find what you wanted. Perhaps if you look for 'enclosure' you might have better luck. At least, that's what ESR call them and they have a good selection of similar plastic boxes, as well as die cast aluminium which I think looks really nice when painted up.

That sounds like a good use of surplus ammunition boxes. Unfortunately for me, my only shooting friends are into archery, and arrows don't fit into such convenient shapes!
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Old 1st Apr 2024, 12:59 pm   #3
Vintage Engr
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Default Re: Project boxes

Here's a dummy load that I knocked up last week, using an old PC PSU enclosure.
Even if the PSU is beyond repair, the enclosures are useful!

David.
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Old 1st Apr 2024, 1:16 pm   #4
Trigon.
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Default Re: Project boxes

Perhaps counter intuitively, small ABS boxes even those with lids secured by screws are often listed as 'potting boxes'. A common type is the Camden Boss RX2000 series:-

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Widely available - e.g Google: potting box rx2004

e.g. from CPC:-
https://cpc.farnell.com/w/c/electric...2&sort=P_PRICE

CPC don't stock the smallest smallest but others do:-
https://evatron.com/enclosures/small...series/rx2002/

Cheers
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Old 1st Apr 2024, 5:07 pm   #5
Herald1360
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Default Re: Project boxes

How inductive are the metalclad W/W resistors? Does it matter at 30MHz?
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Old 2nd Apr 2024, 1:51 pm   #6
Chrispy57
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Default Re: Project boxes

Nice job David, there must be many homebrew projects where a pre-installed IEC inlet, mains switch and fan would come in handy!

Cheers
Chris
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Old 3rd Apr 2024, 4:47 pm   #7
Vintage Engr
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Default Re: Project boxes

Quote:
Originally Posted by Herald1360 View Post
How inductive are the metalclad W/W resistors? Does it matter at 30MHz?
They're not, inductive that is - at least according to the manufacturer.

I did just check them on a reliable inductance bridge, & up to 30Mhz no problem
It was the first thing I checked. Obtained a 1:1 SWR on 20m.

I've been using it for a couple of days on a TX that I am rebuilding & with no problems.

David.
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