Rubber bottom plate for M49 Banzai bodies

In the original M49, there was a rubber plate in the bottom that the transformer and the electronics was mounted on.
The reason for this was to mechanically isolate the electronics and the capsule from the microphone body.
I have made a design in Autodesk Fusion 360 for a “rubber” mount that can be used for Banzais M49 bodies and Dan’s circuit boards.
I have used a 3D printer and printed the mounting plate in both a hard plastic version and in a soft, rubber like plastic. The soft rubber plastic does reduce the mechanical noise quite a bit.
If anyone is interested I can share the Fusion 360 design. You can then print it or modify the design as you like. Just drop me a PM.
The pros is that the isolation will be better. The cons is that it will raise the capsule mounting plate a bit. I had to shave of two millimetres on the top PCB that holds the capsule anyway.

This is a picture of the printed bottom plate in my M49.

Looks Awesome Stelin ,  8)
What tube did you put in this lovely project  ?
i am glad to see that Banzai mic body fits my PCB kit
i guess the next thing is a rubber adapter for tube vibration

Best,
Dan,

Looks nice! Would love to use this too, as i was looking how to make such a rubber disc myself.

Looks great!

What filament/resin are you printing it in?

Thanks
Mac

Looks great, I had done it with acrylic.
Is it possible to do this with a 3D printer ?
http://cdn.recordinghacks.com/images//mic_extras/neumann/M50-M49-capsules.jpg

That’s the only thing that is missing to make my M49 perfect.

TillM said:

Looks great, I had done it with acrylic.

Click to expand...

Acrylic wouldn't give the same anti-vibration approach as this rubber-like plastics did.

TillM said:

Is it possible to do this with a 3D printer ?
http://cdn.recordinghacks.com/images//mic_extras/neumann/M50-M49-capsules.jpg

That’s the only thing that is missing to make my M49 perfect.

Click to expand...

stelin said:

It’s hard, or even impossible I think, to get smooth surfaces like that on a 3D-printed object.

Click to expand...

Possible, but not using FDM printers. It's possible to use SLA/DLP printing with a clear resin. Especially with post-processing , it would give a great result. One problem, SLA-printers are more expensive. If you would like to explore that, check if there's someone on 3Dhubs.com who has one and can print something for you.

Stefan,
Excellent Idea!!!
I am interested in the Fusion File. Please share.
As you used a 6S6B tube what resistors values did you use?


Regards,
Christian

I have a Form 2 resin printer.

The print quality is excellent.

If anyone wants something printed let me know.

Ninjaflex actually is a filament so I assume this base was printed on an FDM printer....hats off to you as I never had success with the softer filaments.

A 'gasket ' sort of thing to hold a perspex circle (capsule mount platform) would be helpful in both damping and sealing body resonance.

I would think something like this would work: https://www.theplasticshop.co.uk/acrylic-tube-extruded-clear-45mm-od-to-60mm-od.html
Using a tube with an OD of 60mm, but i'm not sure it would fit the pcb.

60mm fits the pcb, but it don’t fit the microphone head.
I try it and you have to mod the chassis until it fits.

I tried 59mm, this would fit the head and you can place it on the pcb, the problem is, that it only can have maximum 1,5mm thickness, cause if its thicker, there is a problem with the electronic and the washer between pcb and capsule mounting plate.

Hey Guys!
This is my first post in this Forum. I've been around as a passive Member for a long time.
You guys are awesome!!
Anyway...
I just wanted to share my results.
big thanks to you !Stelin! for your design and sending me all of those different formats!
with the STEP-file i was able to modify the rubber plate, so it can hold my t8974.

and with the trafo