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Author Topic: Help on a Chassis  (Read 961 times)
1so-static
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« on: May 21, 2014, 09:01:35 pm »

Hi yaaawl
Is there anyone here good with metal - cogs and machining brass, aluminium (alooooominum to peeps from USA) etc?
I'd like to complete two chassis for a project - please PM me if you would be so kind

Here's one of the chassis
now it is coated in white protective plastic at the moment
http://i.ebayimg.com/t/Guitar-Amp-Chassis-blank-for-JTM45-Marshall-and-others-/00/s/NzI5WDc5OQ==/z/3jAAAOxyzqdTeM9o/$_3.JPG

What I think might be best is to surround those in rosewood or beech - not sure yet
the top will be brushed aluminium - then I'd like cogs on top in that antiquified brass you guys are so clever at doing

can anyone help ?


thx

Al
« Last Edit: May 21, 2014, 09:39:01 pm by 1so-static » Logged

MWBailey
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« Reply #1 on: May 21, 2014, 10:53:38 pm »

Ideas abound, but I'm nobody's lame excuse for a machinist.
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1so-static
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« Reply #2 on: May 23, 2014, 04:23:44 pm »

what if I surround the chassis in something like Rosewood
http://postimg.org/image/syfgpd159/58d58180/
and add a brushed aluminum top - this then gives me two tube amplifier chassis ...click on the thumbnail

the thing is - what would be a tasteful and understated steampunk design?
« Last Edit: May 23, 2014, 04:25:18 pm by 1so-static » Logged
Wormster
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« Reply #3 on: May 23, 2014, 05:58:38 pm »

Rosewood yes, brushed ali, hmm I'd go for a burnished copper top myself!
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1so-static
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« Reply #4 on: May 23, 2014, 10:05:32 pm »

Hi Wormster ...Do you think that someone here could help me with that ?
...so might look roughly like this ? http://postimg.org/image/dn1aqojih/8c80f29b/
click on the thumbnail makes it bigger

then I can load in the valve basses or "tooobz" to translate it into American Tongue Tongue Tongue
http://postimg.org/image/8rvfiyjrh/a090fdbd/

..then hey presto - two chassis for a pair of tube amplifiers

Once that's done I can stuff the basic electronics in with nixie VU meters if required

if the chassis can be steam punked in some dort of tasteful way would be good

« Last Edit: May 23, 2014, 10:41:46 pm by 1so-static » Logged
Wormster
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« Reply #5 on: May 24, 2014, 09:23:17 am »

First off, what kind of metal is under the lazor cover, is it steel or ali?

Paint would be the simplest way of coluoring the top deck (where the valves and bases mount) would be to paint it, sheet copper is a tad on the pricy side, (unless you happen to be passing a skip outside a house that is being renovated and you spy an old hot water cylinder!) The rose wood side veneers all you need is some basic woodworking tools (Miter block, fine saw, etc) and a suitable glue (some form of 2 pack resin??)

Personally I would mount the valves the opposite way on the top of the chassis, because it would give a sleeker look to your design, tell me is the second chassis for all of the other gubbins, or are they both going to handle the power and volume, reverb, bass, mid and trebble controls?

Others may come along with moar ideas etc, but I reckon its doable!
« Last Edit: May 24, 2014, 09:28:41 am by Wormster » Logged
1so-static
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« Reply #6 on: May 24, 2014, 10:42:13 am »

Hi Wormster - thank you for replying

Firtsly the under chassis has to be steel to screen out unwanted spectra from broad range of Radio frequencies and other sources and yes, all the other electronic components get hidden in there keeping the 450Volt HT rail away from the user.

I can get hold of sheet copper - what would be expensive is getting it brushed to look nice and a lacquer to prevent it getting finger marks, tarnishing and turning into copper oxide.

I'll have to find a wood workist somewhere because I just don't have the tools for that. When I've tried working in wood before - it looks Like Picasso did it.

I've now completed the circuit design (this is where my skills come in ) I'm about to go find the parts to make this hum nicely on my bench
Circuit and suspected frequency response here http://postimg.org/image/m5u1mp13r/8e489e9b/
« Last Edit: May 24, 2014, 10:43:53 am by 1so-static » Logged
Wormster
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« Reply #7 on: May 24, 2014, 10:47:01 am »

what would be expensive is getting it brushed to look nice and a lacquer to prevent it getting finger marks, tarnishing and turning into copper oxide.

AH that's where plain old elbow grease and sweat come in, as you seem to be competant with the "blue smoke" inside all you need to find is a good carpenter. good luck with your search!
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Drew P
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« Reply #8 on: May 24, 2014, 02:15:29 pm »

A little bit of sandpaper or 3M scotchbright pads and then some Renaissance Wax will do what you want for the copper.
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1so-static
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« Reply #9 on: May 25, 2014, 01:18:49 pm »

Thank you folks for all your responses -

Here are the two chassis I obtained from a local supplier of mine; still in their cellophane protective wrappings
Wrapping in nicely polished wood should be the last job - in the mean time I'm going to concentrate on getting the precision signals out of these units as 15W amplifier Mono blocs

If I can get enough help here AND if we can work together - once finished I'd like to donate them to Legba, who recently had an altercation with an online idiot, a type of ingnominious scum and feculence of the first order. I actually come from the broadcast industry, have the power to do the electronics and zap myself often.

Anyone helping with ideas around steampunking it and help with the metal would be gratefully received

Plz give generously  Cheesy

plz see further thread here http://brassgoggles.co.uk/forum/index.php/topic,43037.msg901676.html#msg901676

kind regards
Al
« Last Edit: May 25, 2014, 01:30:04 pm by 1so-static » Logged
Wilhelm Smydle
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« Reply #10 on: May 26, 2014, 04:18:08 am »

Look for a good scrap dealer.
I picked up a piece of 3" copper pipe that just needed some time go get back into sheet form.
The hammering and fire produced a wondeful worn pattern.
Comercial patinas like novacane black can help add an aged look.

Half the fun of the project is seeing how what you scavenge effects the piece.
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1so-static
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« Reply #11 on: May 26, 2014, 09:55:42 am »

Being the dumb bum I am, I honestly hadn't thought of that  Roll Eyes - that's real helpful, thank you
In the work I do, of course we always buy new - and my supply chain is different
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1so-static
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« Reply #12 on: May 26, 2014, 12:51:02 pm »

I've revoiced the amplifier to be as flat as possible across the audio spectrum
http://postimg.org/image/a2c9mfwpj/4222d235/
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Maets
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« Reply #13 on: May 26, 2014, 12:54:24 pm »

Use the "direct link" and put it between the img tags to see the pictures



« Last Edit: May 26, 2014, 12:55:56 pm by Maets » Logged

SeVeNeVeS
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« Reply #14 on: May 26, 2014, 01:11:43 pm »

So what will these drive? Is this for gittars or stereophonic musical compact disc devises?

Please excuse my ignorance, btw, whats the dimensions on these?

~SeVeN~
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1so-static
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« Reply #15 on: May 26, 2014, 01:40:32 pm »

Hi

These will be precision amplifiers designed for high end audio reproduction
driving an expensive set of speakers

Lowest distortion, highest possible dynamic range

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Argus Fairbrass
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« Reply #16 on: May 27, 2014, 11:49:16 am »

Ha! I actually assumed it was a guitar amp, just shows how genned up I actually am on this whole deal.

Hey static have you seen this website? I came across it on Dieselpunks and I have to say it's one of the cleverer ones. Obviously the product stylings are a bit more WW2, but still there may be some inspiration to be had from their designs (if you can figure out how to find them).  Cheesy

http://www.shadowhillsindustries.com/
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« Reply #17 on: June 01, 2014, 02:16:11 am »

Two quick thoughts:

First, one source of heavy-gauge brass sheet is brass door kick plates available at builders' supply houses. (Take a magnet with you to check that it isn't just plated steel.)

Second, had you considered engine turning the faceplate?
Spoiler: A few photos: (click to show/hide)
Experimentation would be in order, but I should think you could achieve the effect with a Dremel and a stainless-bristled end brush, although you might prefer a drill press and jig to get the pattern even.
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Drew P
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« Reply #18 on: June 01, 2014, 04:58:07 am »

You can also cheat and find some in sticker form on Ebay. They come in fair size sheets and are really thin metal laminated with clear plastic. So it is actually metal and very exact in pattern.
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