Chassis issues
Moderator: VelvetGeorge
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Chassis issues
I have ordered my 50W board and other parts and am looking forward to starting my project.
Issue: the 50 watt Marshall (if I am not mistaken) uses 3 multi-caps. I saw that the chassis used in the kits has circular cuts for mounting the multi-caps. My chassis only has one multi-cap mounted below the deck, and its mounted off to one side (not between the transformers as the Marshalls appear to be).
How do you guys recommend addressing this issue? Do I have to take the chassis to a metal shop to get two additional circular holes cut in the chassis (or perhaps 3 so the holes are in the same location as on the Marshalls)? Is there another way to mount the caps?
Thanks,
Scott
Issue: the 50 watt Marshall (if I am not mistaken) uses 3 multi-caps. I saw that the chassis used in the kits has circular cuts for mounting the multi-caps. My chassis only has one multi-cap mounted below the deck, and its mounted off to one side (not between the transformers as the Marshalls appear to be).
How do you guys recommend addressing this issue? Do I have to take the chassis to a metal shop to get two additional circular holes cut in the chassis (or perhaps 3 so the holes are in the same location as on the Marshalls)? Is there another way to mount the caps?
Thanks,
Scott
- Flames1950
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For safety's sake I'd ad holes so the leads are down inside the chassis. You COULD mount them upside-down with the clamp so the leads are sticking up and then you'd just drill holes, but I'd be scared to death to reach in there.....might work better this way if there's room inside the chassis to mount them, like an old JTM45.
But why cough up dough to go to a machine shop? Go to Sears or wherever and buy a Greenlee cutter in the right size and do them yourself....and you'll always have the tool for the next time around....
But why cough up dough to go to a machine shop? Go to Sears or wherever and buy a Greenlee cutter in the right size and do them yourself....and you'll always have the tool for the next time around....
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The upside down mounting sounds a bit hairball, with the wires having to travel "up" the side of the can to reach the lead. I think drilling/cutting the holes sounds like the better way to go.
Also, is a "Greenlee" cutter something that attaches to a drill for cutting metal? So I just go to Sears and get the size I need - what size is that if anyone knows?
And, if I cut the chassis, I can mount all the caps in the equivalent position that they occupy on the Marshall, for ease of wiring.
Scott
Also, is a "Greenlee" cutter something that attaches to a drill for cutting metal? So I just go to Sears and get the size I need - what size is that if anyone knows?
And, if I cut the chassis, I can mount all the caps in the equivalent position that they occupy on the Marshall, for ease of wiring.
Scott
- Flames1950
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A Greenlee cutter is actually more of a punch. You'll have to drill a hole big enough for the center bolt of the cutter. The cutter is in two halves that you assemble on the bolt, then as you tighten the bolt the cutter pulls through and makes the hole. It will come out way neater than the holesaw you've got in mind.
It's a good investment, because I'm with you on the idea of running the leads up the side of the can with the terminals on top. One wrong move and you're fried.....
Here's an example of a Greenlee cutter:
http://www.grainger.com/Grainger/produc ... 70&ccitem=
I just wish it was pictured spaced apart so you could see how the cutting half looks, it's kinda got two big "teeth" 180 degrees apart that slide into the other half as you tighten it up.
It's a good investment, because I'm with you on the idea of running the leads up the side of the can with the terminals on top. One wrong move and you're fried.....
Here's an example of a Greenlee cutter:
http://www.grainger.com/Grainger/produc ... 70&ccitem=
I just wish it was pictured spaced apart so you could see how the cutting half looks, it's kinda got two big "teeth" 180 degrees apart that slide into the other half as you tighten it up.
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- VelvetGeorge
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You can mount the caps inside without drilling a large hole like this:
Far right, mounted over the power trans.
George
Far right, mounted over the power trans.
George
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- Senior Member
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- VelvetGeorge
- Site Owner
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- Just the numbers in order: 13492
- Location: The Murder Mitten
- Contact:
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- Senior Member
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- Joined: Fri Oct 08, 2004 10:14 pm
- Flames1950
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- Location: Waukee, Iowa
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Im gonna tell you a little secret, if you have an aluminum chassis you can use a regular spade bit, the ones for wood. aluminum is very similar to wood as far as metals go. You can buy a punch kit over at harbor freight for $20, but the spade bit is cheaper and faster, and available at any hardware store.
i have done this many times and the holes are very clean..
mike
i have done this many times and the holes are very clean..
mike