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Re: S/N 0994 receiver internal noise


 

great work!

On Fri, Jan 3, 2025 at 6:11?PM w9blw via <brandon.wiewel=[email protected]> wrote:
Ryan, I mocked up some forms to act as a mold for shielding tape yesterday.? The output side had plenty of space to add a full shield and seems like a no brainer. The input side did not have any room to spair so i had to cut the middel part of the form out. The speaker literally touches some of the coils. I was able to add some shielding to the sides but i don't know if its really attributing to anything.? i added the .stl files i used to this post if anyone wanted to try this them selves, as a disclaimer I am self taught with 3d design so I'm sure someone could do much better. you will need to print them on their back and use an auto tree for the over hangs.? They print really nice, i use a bambu P1S. i printed 100% fill and they still print fast (~1 hour) with a .06 hotend . as you can see you will need to cut away at them depending on how you want them to fit but that is very easy to do.?

big question is how is the noise. ill put it this way, if the radio performed as it is now i would had never thought there was an issue.? do i still see things when i crank the IF past 90 yes.. but it doesn't look abnormal, no birdies or hard hash in one spot. Ill be the first to admit the radio is a ton of fun with or without this shielding but it has seemed to make a difference and its a fun project.?

some photos with notes.?




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