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Old 22nd Oct 2018, 7:13 pm   #1
Neil Purling
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Default Chassis Question

Can you buy 'U' shaped aluminium for DIY projects? About 6" across the top, 2" down the sides in various lengths. The stuff was a round on ebay to make DIY guitar amps and such. Used some to make a Mullard 3-3 on.
I haven't seen any of late. Maybe I am looking in the wrong place. All I have at the moment is the dismantled outer shell of a tower PC case. I thought it might come in handy sometime.
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Old 22nd Oct 2018, 8:48 pm   #2
bikerhifinut
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Default Re: Chassis Question

perhaps a supplier of structural metalwork?
That sounds a bit like a rolled or extruded channel section.
You may be able to score some offcuts/scrap for not too much?

A.
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Old 23rd Oct 2018, 8:38 am   #3
M0FYA Andy
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Default Re: Chassis Question

A better description of just what you are looking for would be helpful. Perhaps a picture of the Mullard 3-3 amplifier?

Andy
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Old 23rd Oct 2018, 10:22 am   #4
Neil Purling
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Default Re: Chassis Question

The metal chassis I used for the 3-3 was originally supplied as a blank to make a guitar amplifier on. It is 2mm aluminium, which is a bit on the thick side if you aren't mounting the hefty transformers for a guitar amp.
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Old 23rd Oct 2018, 1:56 pm   #5
Terry_VK5TM
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Default Re: Chassis Question

While this is an Australian link https://www.ullrich.com.au/extrusions/channels it should give you an idea of what is available.

Somebody will know a UK supplier that should have much the same stuff.

One thing you will notice is the thickness of the stuff as the width and height size goes up.
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Old 23rd Oct 2018, 4:18 pm   #6
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Default Re: Chassis Question

A local sheet metal firm will willingly fold up a bit of ali for you, a neat drawing (a 3d dimensioned sketch is all they need) and "how much for cash" usually works. My last bit of bent metal about that size was less than a tenner (they got a tenner, keep 'em sweet).
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Old 24th Oct 2018, 6:37 am   #7
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Default Re: Chassis Question

I might be able to make what you want, I have 2mm and 0.75mm ali sheet, but Merlin's idea is a good one, my local ish aluminium supplier does this, they'd be able to do it cheaper than I could I think.

Andy.
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Old 24th Oct 2018, 9:33 am   #8
G6Tanuki
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Default Re: Chassis Question

These guys:

http://www.aluminiumuk.co.uk/

have a range of extrusions that may be of use. I've bought aluminium tube/rod for antennas from them in the past.
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Old 24th Oct 2018, 9:35 am   #9
Craig Sawyers
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Default Re: Chassis Question

This sort of thing?

http://www.hammondmfg.com/dwg21.htm

Craig
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Old 24th Oct 2018, 12:07 pm   #10
bikerhifinut
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Default Re: Chassis Question

I have some of those for a job, bought from bluebell audio in scotland, he has a website and the prices aren't too bad for bare chassis. They are pretty good.

http://www.bluebellaudio.com/

andy
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Old 24th Oct 2018, 3:21 pm   #11
Craig Sawyers
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Default Re: Chassis Question

You got there before me! I failed to remember the name Bluebell, and managed to find it in my shortcuts.

Bought chassis from them before - they are good guys.

Craig
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Old 24th Oct 2018, 11:29 pm   #12
Biggles
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Default Re: Chassis Question

A few years ago I kept having the same problem so took the plunge and bought a metal bending rig. I buy blank sheets of aluminium (even RS do them) and bend my own chassis. The bender is bulky to store and isn't used a lot but it is really useful for a variety of jobs. I remember that even good ol' Maplin used to supply ready made chassis in a couple of sizes.
Alan.
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Old 25th Oct 2018, 12:09 am   #13
Neil Purling
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Default Re: Chassis Question

The chassis I was looking at was around 11 quid or 16 if I wanted a base plate. Not bad really.
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