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Re: chassis


 
11/6/1997 10:21 PM
R.G.
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Re: chassis
You might want to remember that if the glue is not conductive, you'll need to run a grounding wire to a screw in each piece to be sure that they're grounded. Otherwise, sounds like a great deal. I want some.
 
11/6/1997 10:45 PM
Karl Zwengel
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I don't really have a grounding problem. I'm using a bus bar and grounding everything to one point. Makes for a nice quiet amp. On a small tangent, have you ever tried floating the heaters at a potential above the cathode to reduce hum? I'll make a separate post for this one with more detail.
 
10/23/1997 1:32 PM
Whit
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Kevin,  
 
I just used an old aluminum rack panel,  
19 inches by whatever size you need.  
 
Couple that with the extruded side panels  
idea suggested elsewhere in this thread  
and I'd imagine you'd end up with a  
very sturdy item.  
 
Machining was easy with Greenlee punches  
and Ti coated drills....  
 
... Whit
 
10/23/1997 3:47 PM
DH
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You might want to try Mojo Musical  
supply or Dixie Sound Works for  
Fender and Marshall chassis.  
Or you can buy a magazine such as  
The Home Shop Machinist and look  
thru it for mail order vendors  
that sell metal sheet. My favorite  
material is T6 Aluminum.Easy to work  
and makes a quieter amp than steel.  
Use a terminal strip for grounds since  
you cannot solder to the aluminum.  
 
D.H.
 
10/23/1997 3:48 PM
David Axt
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I have never done this but.......  
 
I believe that it would be possible to use an aluminium or steel cake pan for a chasis. The only problem is that the sides are not exactly 90 degrees. The sides are slanted to allow the cake to come out. These pans come in various sizes and shapes and can be purchased cheaply at thrift stores and garage sales.  
 
Anybody have opinions on this?
 
10/23/1997 3:57 PM
Whit
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David,  
 
Ah, a "recycler" like myself I see.  
 
I go to a lot of auctions/rummage sales  
etc. and see all kinds of potential  
chassis material... cake pans, serving  
trays, magazine racks, filing cabinets,  
stove parts, tractor parts, ...  
 
Well, you get the idea, the world is  
a playground of potential...  
 
And old radios/phono cabinets make some  
great combo amp cases too!  
 
... Whit
 
10/23/1997 5:23 PM
Steve M.
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Re: cake pan chasses:  
 
I tried this using some cheap cake pans that I got at the local supermarket. One thing that I found out though, is that the cheaper pans are made of very thin aluminum. They flexed and distorted very easily under the weight of the transformers. Steel would be stiffer, but I specifically wanted to try aluminum as it is easier to work with hand tools.  
 
The sides are slanted, but this is not too much an inconvenience.  
 
I got this idea from an old timer that Sound Practices did an article on. He primarily builds 300B push pull amps, and uses cake pans as his chasses. He said he got a truckload of them when a local hardware store went out of business.  
 
Steve
 
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