Hi
I want to get some idea how to and some tools I don't know where to get:
1) A wedge type of handheld hole expander for drilling holes for tubes. For the life of me, I cannot find this here. As a kid, I had one in Hong Kong for opening up holes to fit vacuum tube socket, it's like in this drawing:
It is so primitive, it has ridges almost vertical sharp ridges as shown, you just stick it in a hole, crank and expand the hole to the size you want. I know they have step drill, I have them up to 1 3/8" diameter, but that's not what I want. Because those step drill on a drill press is very rough, every time it goes down one step, it jot the whole panel. I am drilling 2mm thick aluminum panel, that jot will warp the panel. I need to do it very gently like using this and take the time. Hydrolic press is too expensive to drill a few holes. Please give me either a source to buy this or some other suggestions.
I should have it shipped here 40 years ago. But hell, this is United State of America, how can we have this in Hong Kong and not here!!! Must be too primitive!!!
2) I need to cut square hole for the power transformer onto aluminum panel, what cutting tool I need. I know it might have to be a scroll saw or something. Just want some suggestions. I have been paying extra for chassis that have power switch because I have no means to open a square hole to fit the power switch.
3) I know I can get pcb solder 9pin 12AX7 socket from Tube Depot, anyone make big socket for EL34/6L6 big tubes? I can't find one.
I am contemplate building a tube amp, this is something I never have to think about before.
Thanks
I want to get some idea how to and some tools I don't know where to get:
1) A wedge type of handheld hole expander for drilling holes for tubes. For the life of me, I cannot find this here. As a kid, I had one in Hong Kong for opening up holes to fit vacuum tube socket, it's like in this drawing:
It is so primitive, it has ridges almost vertical sharp ridges as shown, you just stick it in a hole, crank and expand the hole to the size you want. I know they have step drill, I have them up to 1 3/8" diameter, but that's not what I want. Because those step drill on a drill press is very rough, every time it goes down one step, it jot the whole panel. I am drilling 2mm thick aluminum panel, that jot will warp the panel. I need to do it very gently like using this and take the time. Hydrolic press is too expensive to drill a few holes. Please give me either a source to buy this or some other suggestions.
I should have it shipped here 40 years ago. But hell, this is United State of America, how can we have this in Hong Kong and not here!!! Must be too primitive!!!
2) I need to cut square hole for the power transformer onto aluminum panel, what cutting tool I need. I know it might have to be a scroll saw or something. Just want some suggestions. I have been paying extra for chassis that have power switch because I have no means to open a square hole to fit the power switch.
3) I know I can get pcb solder 9pin 12AX7 socket from Tube Depot, anyone make big socket for EL34/6L6 big tubes? I can't find one.
I am contemplate building a tube amp, this is something I never have to think about before.
Thanks
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