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Old 20th August 2014, 11:00 PM   #1
WSJ is offline WSJ  United States
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Default Low Cost Amplifier Chassis Ideas

If you are looking for a low cost chassis a power amp you could use an old Hewlett Packard test equipment chassis. A new front and rear panel could fabricate with the desired controls and labels. Most chassis have a power cord connector and nice top and bottom covers. Here are some parts I assembled form several chassis.

http://www.diyaudio.com/forums/attac...8575440chassis
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Last edited by WSJ; 20th August 2014 at 11:04 PM.
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Old 21st August 2014, 08:35 AM   #2
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wow --that looks really neat and strong --
( my circuits are a piece of plywood with flattened copper wire 1mm -3mm -glued
Into the (printed circuit pattern) scale drawing --onto the plywood )
have also used conductive bronze "paint " to emulate a printed circuit schematic--
copper etching plate & fancy printed circuits cost forex --
so I improvise ---- ( DIY ) --necessity = mother of invention--
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Old 21st August 2014, 09:31 AM   #3
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Quote:
Originally Posted by carl winter View Post
wow --that looks really neat and strong --
( my circuits are a piece of plywood with flattened copper wire 1mm -3mm -glued
Into the (printed circuit pattern) scale drawing --onto the plywood )
have also used conductive bronze "paint " to emulate a printed circuit schematic--
copper etching plate & fancy printed circuits cost forex --
so I improvise ---- ( DIY ) --necessity = mother of invention--
This is like reading morse codes.

A fabricated amp chassis would only cost us around US$10-20 so there is little point for Indonesians to make one, unless you want to be unique. Attached is one sample. However, using Cisco router chassis is also not unheard of.
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Old 23rd August 2014, 01:02 AM   #4
WSJ is offline WSJ  United States
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Here is an easy addition to make a variable PSU.

Click the image to open in full size.
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Old 25th August 2014, 04:57 AM   #5
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I bought a mid-sized metal card file at New-To-You resale last week for $.50, on sale from $1 because it was yellow tag week. the point to point circuits go on the NEMA CE laminate in the hinged top (now the bottom). Holes drilled in the laminate as required. Heatsink goes on a cutout in the bottom (now top), with the output transistors. Transformer goes on the bottom(top). Radio waves go into the steel case and out the ground wire, because of all metal enclosure.
Thieves walk right around this stuff because it looks like ****. The last thief in here took only a gold flash watch, worthless to me because the self wind feature wouldn't keep it running (but it looked good). They left the $600/pair speakers too; something about lifting 94 lb off the pole perhaps. No casual thief wants a Steinway piano, either.
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Last edited by indianajo; 25th August 2014 at 05:04 AM.
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Old 25th August 2014, 06:26 AM   #6
Mooly is offline Mooly  United Kingdom
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Posts deleted. Come on guys, you all know better than this.
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Old 25th August 2014, 01:00 PM   #7
Junm is offline Junm  Philippines
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haha, cheap chassis? i do mine from scrap aluminum materials from junkshops. Just a little patience in doing from scratch..attach some pix later...Recycle men!
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Old 25th August 2014, 02:04 PM   #8
Mihkus is offline Mihkus  Estonia
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Yeah, 3mm aluminium is just perfect for everything. All you need is couple of drills screw taps, screws and anglegrinder.
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Old 25th August 2014, 09:04 PM   #9
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Save the good cardboard boxes (some are notably better than others). Paint with "White wood glue" (PVA) and wrap with aluminum kitchen foil. Now you have a very very cheap shielded box.

As a side thought, you could potentially take this further and make your own cardboard shapes potentially more interesting than stack-able boxes.
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Old 26th August 2014, 08:36 AM   #10
AndrewT is offline AndrewT  Scotland
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I have diligently been "recycling" all my cardboard to save the planet.

Do you think they will give me back some of my boxes if I ask nicely?
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