The No.1 Website for Pro Audio
 All  This Thread  Reviews  Gear Database  Gear for sale     Latest  Trending
Noise can be heard from the assembled DIY U87 microphone
Old 22nd August 2019
  #1
Here for the gear
 

Noise can be heard from the assembled DIY U87 microphone

I purchased two “U87 clones” at “Mic And Mod”.

I assembled and tested two microphones, but there is noise in one of the microphones.

I will attach two microphone sound samples.
Is this noise an initial failure of the diaphragm?

If you are familiar, please let me know.
Thank you for your cooperation.


A Mic (No problem microphone)


B Mic(Noizy Mic)
Old 24th August 2019
  #2
Lives for gear
I doubt that what we are hearing is a diaphragm problem. That sort of unstable “bubbly” noise is more likely to indicate a powering problem (48v) within the mic, or a problem with components or wiring in the mic. Check your work?
Old 27th August 2019
  #3
Here for the gear
 

Thank you for your reply.

Therefore, the possibility of a defective diaphragm capsule is very low?
I'll try again to check for voltage calibration and soldering defects.
Old 27th August 2019
  #4
Lives for gear
That’s where I would start.
The possibility of diaphragm failure in a DIY build is actually much higher than it is in a factory product. The diaphragm is exposed to more chances of mishandling because it isn’t installed by someone who does a number of these every day and then tested in its assembly and screening as it would be at the factory.
But I don’t think the sound we are hearing is a torn or crumpled diaphragm.
Old 27th August 2019
  #5
Here for the gear
 

I am translating Japanese into English, so I'm sorry if the grammar / expression is wrong.

Thank you very much for your polite advice.
Old 27th August 2019
  #6
Lives for gear
Quote:
Originally Posted by bellsmarket View Post
I am translating Japanese into English, so I'm sorry if the grammar / expression is wrong.

Thank you very much for your polite advice.
Your English vocabulary and grammar are very good. I would never have guessed that you were writing in a second language.
Post Reply

Welcome to the Gearslutz Pro Audio Community!

Registration benefits include:
  • The ability to reply to and create new discussions
  • Access to members-only giveaways & competitions
  • Interact with VIP industry experts in our guest Q&As
  • Access to members-only sub forum discussions
  • Access to members-only Chat Room
  • Get INSTANT ACCESS to the world's best private pro audio Classifieds for only USD $20/year
  • Promote your eBay auctions and Reverb.com listings for free
  • Remove this message!
You need an account to post a reply. Create a username and password below and an account will be created and your post entered.


 
 
Slide to join now Processing…
Thread Tools
Search this Thread
Search this Thread:

Advanced Search
Forum Jump
Forum Jump