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 Post subject: Re: Tenite Escutcheon RCA 811K & 816K
PostPosted: Sep Sun 28, 2014 2:03 am 
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Kirk, we are opposite sides of the USA, or I'd suggest we get together. The brown with tan swirl seems to be the most common. I've got the Silicone molds made of the Emerson parts. The warped originals were laser scanned, then the files manipulated with software, then parts made with 3D printers. After those were right, the molds were made from the 3D-printed white plastic parts.

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 Post subject: Re: Tenite Escutcheon RCA 811K & 816K
PostPosted: Sep Sun 28, 2014 12:58 pm 
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We should definitely meet up Steven, Half way? say Texas or so. lol

Ok so I did a test run but only have brown tint right now. I made 2 batches of plastic, one white and one brown. I poured them together and swirled with a thin pick and poured.

This is how it came out on a knob and molding piece.


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 Post subject: Re: Tenite Escutcheon RCA 811K & 816K
PostPosted: Sep Sun 28, 2014 4:07 pm 
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What is type and source of the plastic?

By the way, I discovered that Tenite is apparently still being made!

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 Post subject: Re: Tenite Escutcheon RCA 811K & 816K
PostPosted: Sep Sun 28, 2014 8:17 pm 
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I purchased my plastics from Smoothon.com. The types I use are OOMO 300 for white plastics and OOMO 325 for tintable plastics.
They sell the color tint there also. A little goes a loooooong way.

The only issue I have seen is that the 325 when tinted does not seem as rigid as the 300. It is more pliable which can be good in some applications.

Using Tenite is a good idea if you want return business. They buy one now and then will need a new one in 50 years, lol

Kirk

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 Post subject: Re: Tenite Escutcheon RCA 811K & 816K
PostPosted: Oct Thu 08, 2015 7:16 pm 
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I know I am restoring an old thread from a little over a year ago, but I am wondering if anyone ever produced any 811k parts as were being discussed. Now in 2015 with the ease of getting and using a 3D printer I wonder if this would be the way to go.

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 Post subject: Re: Tenite Escutcheon RCA 811K & 816K
PostPosted: Oct Fri 09, 2015 8:53 pm 
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Location: Near Brandon, Iowa
This is a "low tech" proposal but it seems to me that it would be easy enough to make a mold master out of laid-up, cemented, and carved styrene, then make a mold from it out of RTV and cast new dial frames parts in resin. For the curved 813/816 frames this may need to be a multiple-part, glue-it-together casting. The resulting product wouldn't have the characteristic mottled appearance of the original Tenite (it would have a disgusting whitish-yellow hue), but could be convincingly painted. Since the escutcheon experiences little "touch wear" it should last indefinitely.

The biggest obstacle to making a plastic die-cast part is creating the injection mold. Resin-casting using RTV molds has revolutionized the scale model scene (model railroading, automobiles, hero figures) in the past 20 years because it eliminates the enormous cost of the metal mold and opens up a vast range of new modeling subjects. Don't know why this approach couldn't be applied to something like a plastic radio escutcheon.

(BTW, I'm an 810K and 811K owner who would probably be a purchaser of repro dial frames should they become available.)


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 Post subject: Re: Tenite Escutcheon RCA 811K & 816K
PostPosted: Aug Tue 28, 2018 7:27 pm 
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I know this is an old thread, but if any escutcheons went into production, I could use 2 for the 811K and 2 for the 816 K. Let me know price and availability!! Thanks, and 73 Ross W1EKG

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 Post subject: Re: Tenite Escutcheon RCA 811K & 816K
PostPosted: Aug Tue 28, 2018 10:10 pm 
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Location: Mission Viejo, southern California
I'm still trying to find a way to do the Emerson BD-197 "Mae West" parts. I sent my molds to somebody who was not successful, and the 3D printing files were lost, so I have to start over.

All of the people above who mentioned prices such as $50 for the RCA parts need to multiply that by a factor of five or ten to get anywhere close to a reasonable cost for all of the effort and expense that is involved. Solid color would be far easier, and can be done with 3D printing.

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 Post subject: Re: Tenite Escutcheon RCA 811K & 816K
PostPosted: Aug Thu 30, 2018 1:13 pm 
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Location: Houston, TX
I would settle for the solid color for the 816K. It wouldn't be perfect but much better than what I have.
Jon

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