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Thread: 077/2405 phase plug

  1. #16
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    Well I didn't make them to market them, I only wanted them for myself. As for casting them in acrylic, not so easy. I've been in injection molding for 35 years and have worked with every plastic material available, to cast something with no voids is difficult and to top it off you need a threaded hole, so casting then machining?

    The way to go for proper part geometry would be to make an injection mold and mold them in acrylic just like the originals. A cheap mold would be a few thousand then you need the material to mold with and a machine. I have access to machines in my work, material and molds and I still wouldn't bother, too much work you'd have to sell quite a few to just break even.

    This was for my personal use only, and they came out pretty good

  2. #17
    Senior Member audiomagnate's Avatar
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    Quote Originally Posted by kenp3 View Post
    Well I didn't make them to market them, I only wanted them for myself. As for casting them in acrylic, not so easy. I've been in injection molding for 35 years and have worked with every plastic material available, to cast something with no voids is difficult and to top it off you need a threaded hole, so casting then machining?

    The way to go for proper part geometry would be to make an injection mold and mold them in acrylic just like the originals. A cheap mold would be a few thousand then you need the material to mold with and a machine. I have access to machines in my work, material and molds and I still wouldn't bother, too much work you'd have to sell quite a few to just break even.

    This was for my personal use only, and they came out pretty good
    They don't look good, they look great, and Barry, from now on I'll make sure to put a "smiley" in my sarcastic posts to keep from confusing and/or offending you.

  3. #18
    Senior Member Ed Zeppeli's Avatar
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    They look great!
    DIY Array, 2242 sub, 4408, 4208, Control 8SR, E120 Guitar cab, Control 1, LSR305.

  4. #19
    Senior Member bldozier's Avatar
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    Any reason you didn't try a wood plug. Wood, or glass. Idk if glass is resonable. But wood for sure.

  5. #20
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    Glass needs special grinding and forming plus there's the problem of the thread for the rod, wood would still need some kind of turning equipment to be concentric that's a compound curve on the sides, besides I wanted it to look like the real deal.

  6. #21
    Senior Member audiomagnate's Avatar
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    Can you tell if the originals were made in a mold or the same way you make them?

  7. #22
    Senior Member 1audiohack's Avatar
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    Molded, for sure.

    Barry.
    If we knew what the hell we were doing, we wouldn't call it research would we.

  8. #23
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    100% molded. It would be nice to find the original mold for these pieces, probably sitting in a warehouse rusting away.

  9. #24
    Senior Member audiomagnate's Avatar
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    Quote Originally Posted by kenp3 View Post
    100% molded. It would be nice to find the original mold for these pieces, probably sitting in a warehouse rusting away.
    Probably scrapped or simply tossed years ago. At Mitsubishi we sent a dump truck full of "obsolete" parts and equipment to the landfill every month. Out with the old, in with the new, no matter how crappy the new stuff was. BTW kenp3, how did you end up with 2405's without phase plugs? Or did you convert 077's to 2405's?

  10. #25
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    Said he had 'em, just some question on the threads.

    Quote Originally Posted by kenp3 View Post
    Thanks for the replies. I have the plugs, just wondering what size it was 10-32 seems small. In one of the 2405 there was 2 small aluminum washers in the other there were none, what's the purpose of those?

  11. #26
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    I have heard that there are many,many 2405's with acrylic phasing plugs that were painted black from the factory.....

  12. #27
    Senior Member 1audiohack's Avatar
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    Heard that too, never seen one.

    Barry.
    If we knew what the hell we were doing, we wouldn't call it research would we.

  13. #28
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    I could use a pair of acrylic phase plugs.

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