I know it is a weird question. Do you know what is the name for those rubber grommet rings they put on the tube holes in the chassis? Trying to find, but for some reason fail to do so. Would appreciate it you can point me in the right direction.
Yes, that's what they are called. Search | Antique Electronic Supply
Lots of options here: Blocked
jeff
Lots of options here: Blocked
jeff
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More options here as well. Nice thing is you can get them in thicknesses that accommodate a variety of thicknesses.
McMaster-Carr
McMaster-Carr
For the tube holes you could use this type of stuff... https://www.amazon.ca/Black-Small-0...ee70b&pd_rd_wg=xGt8F&pd_rd_i=B00KG9BAY0&psc=1
The trim rings or grommets look worse than the bare aluminum.
Just use a sharpie permanent marker, you can always touch it up if needed.
Just use a sharpie permanent marker, you can always touch it up if needed.
They will degrade in the heat from the tubes...your tubes will run hot, they need ventilation.
Not a good design.
Not a good design.
Mine is rated to 3.5mm / 10 gauge and I drive it with an impact driver...
Here's one that is similar.
https://www.amazon.ca/IBOSAD-Knocko...635961962&sprefix=chassis+punch,aps,65&sr=8-4
And an even cheaper one. https://www.amazon.ca/LICHAMP-Manua...8e997&pd_rd_wg=gL3zr&pd_rd_i=B0817325R4&psc=1
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I believe you could oversize both the holes and therefore the grommets. I also believe McMaster Carr has high heat grommets. I would do that as it would have a bit of "cool" factor to your build
Making large holes in chassis: Use a step drill to get close and then use a forstner bit on slow in the drill press ( I'm using it with a predrilled guide in acetal clamped, it also prtects the surface against the swirl coming from drilling) to drill the final hole.
Alternatively use a woodrouter with a guide to cut it (I'm using it to trim the aluminium to size, take only thing custs at a time, 1/32" or so). Up to 3/16" use tungsten, above 3/16" use HSS. Lubricate.
Rubber grommets: On very early radios that had low audio output the transformer noise could be irritating. I've come across a couple of old Philips radio's when I was a teen that had the power transformer mounted on a /washer - rubber grommet - washer - nut/. Transformer noise drops down a lot.
Enjoy
EL506
Alternatively use a woodrouter with a guide to cut it (I'm using it to trim the aluminium to size, take only thing custs at a time, 1/32" or so). Up to 3/16" use tungsten, above 3/16" use HSS. Lubricate.
Rubber grommets: On very early radios that had low audio output the transformer noise could be irritating. I've come across a couple of old Philips radio's when I was a teen that had the power transformer mounted on a /washer - rubber grommet - washer - nut/. Transformer noise drops down a lot.
Enjoy
EL506
PKI,
I think what you are looking for are Heyco bushings. They're a good coverup if you have ragged holes. I've used a Starrett hole saws a little undersized then a Dremel to get the final size for the bushing.
Mouser has them in many sizes. Search number 836-2182 for instance. Go oversized 1/8" all around (1/4" larger diameter) for small tubes, perhaps larger for power tubes.
S.
I think what you are looking for are Heyco bushings. They're a good coverup if you have ragged holes. I've used a Starrett hole saws a little undersized then a Dremel to get the final size for the bushing.
Mouser has them in many sizes. Search number 836-2182 for instance. Go oversized 1/8" all around (1/4" larger diameter) for small tubes, perhaps larger for power tubes.
S.