R/E/P Community

Please login or register.

Login with username, password and session length
Advanced search  

Pages: [1]   Go Down

Author Topic: Removing the grill on a Gefell UM70  (Read 2903 times)

ricknroll

  • Sr. Member
  • ****
  • Offline Offline
  • Posts: 361
Removing the grill on a Gefell UM70
« on: September 21, 2005, 01:24:25 PM »

I have a Gefell UM70 that has some kind of ring floating inside the grill, as well as some other small object loose inside.  I want to take off the grill for a closer look (to see if the diaphragm has been scratched, for example) but I can't figure out how to remove the grill.  I unscrewed the top of the mic from the body but I can't see any screws to remove - any helpful hints?

Thanks,

Rick Hedges
Logged

J.J. Blair

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 12809
Re: Removing the grill on a Gefell UM70
« Reply #1 on: September 22, 2005, 03:16:41 AM »

Does it have a plastic ring on the patteren selector?  If so, you might be SOL.
Logged
studio info

They say the heart of Rock & Roll is still beating, which is amazing if you consider all the blow it's done over the years.

"The Internet enables pompous blowhards to interact with other pompous blowhards in a big circle jerk of pomposity." - Bill Maher

"The negative aspects of this business, not only will continue to prevail, but will continue to accelerate in madness. Conditions aren't going to get better, because the economics of rock and roll are getting closer and closer to the economics of Big Business America." - Bill Graham

ricknroll

  • Sr. Member
  • ****
  • Offline Offline
  • Posts: 361
Re: Removing the grill on a Gefell UM70
« Reply #2 on: September 22, 2005, 12:17:19 PM »

J.J. Blair wrote on Thu, 22 September 2005 00:16

Does it have a plastic ring on the patteren selector?  If so, you might be SOL.


JJ,

The pattern selector is all metal - no plastic.  It seems like the metal piece under the pattern selector should unscrew, but I don't want to apply too much pressure, in case my guess is wrong.

Thanks,

Rick
Logged

David Satz

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 661
Re: Removing the grill on a Gefell UM70
« Reply #3 on: September 22, 2005, 12:50:27 PM »

Rick, I don't know the answer to your question but could I offer a bit of advice?

If a microphone is worth using, and the crucial part of it isn't designed to be user-serviceable even though you or I might think that it should have been, please take a tip from Han Solo and "Let the Wookiee win." Bite the bullet and send the microphone in for an authorized checkout and repair.

Good condenser microphones should be checked out by their manufacturer at least every ten or fifteen years anyway. Things age, and the manufacturer is usually the best one to tell you when the mike has gotten to the point where a new this or that (to use the technical term) would be called for. Or if there's a non-factory specialist whom you have reason to trust, go to them by all means. With nice old microphones, users like us are often like the proverbial lobster in the pot of hot water--the temperature is rising gradually over time, and we don't even notice when we're cooked.

I understand why you want to take the screen off in this case, however, since you don't want to ship the mike with something rattling around inside its capsule head that could damage the capsule. So I'd say, send an email message to info@microtechgefell.de and get their advice. They read and write English quite well, in case that was holding you back.

--best regards
Logged

ricknroll

  • Sr. Member
  • ****
  • Offline Offline
  • Posts: 361
Re: Removing the grill on a Gefell UM70
« Reply #4 on: September 22, 2005, 01:37:43 PM »

David,

I agree with your advice.  I probably should provide more detail; this is a mic I recently bought from someone in California, and the ring inside the grill basket apparently came loose in transit.  The seller seems honest, and the mic was packaged well and was insured, so my reason for removing the grill is to prevent further damage when I ship the mic.  I would definitely not attempt repairs on the M7 myself.

Thanks,

Rick Hedges
Logged

Marik

  • Full Member
  • ***
  • Offline Offline
  • Posts: 215
Re: Removing the grill on a Gefell UM70
« Reply #5 on: September 22, 2005, 06:25:23 PM »

Rick,

As David has already said, there are no (easy) user serviceable parts inside the grill. The grill construction is quite complicated and beside the capsule, includes quite elaborate switch.

If after all that you still want to take the thing apart, here we go: on the plastic ring there are two pins. You need to drill little holes with a small diameter bit, tap a thread, insert a little bolt, and then very carefully pull them out.

A few things to think about: ones you take the grill apart, there is a very good chance you won't be able to put it back. Also, there is a very good chance that while taking it apart the spring supported little ball will fly over your head and you will never be able to find where the heck it went.

Best regards, Mark Fuksman
Logged
Mark Fouxman
Samar Audio & Microphone Design
www.samaraudiodesign.com

J.J. Blair

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 12809
Re: Removing the grill on a Gefell UM70
« Reply #6 on: September 23, 2005, 12:00:15 AM »

Mark, he has the metal type.  You are right about the drill for the plastic one.  I've taken both types apart, and that was the onlt remedy for the RFT type.  I've disassembled the newer type though and reassembled it.  It was tricky, but possible.  I'll see if I can look at a friend's to jog my memory.

J.J.
Logged
studio info

They say the heart of Rock & Roll is still beating, which is amazing if you consider all the blow it's done over the years.

"The Internet enables pompous blowhards to interact with other pompous blowhards in a big circle jerk of pomposity." - Bill Maher

"The negative aspects of this business, not only will continue to prevail, but will continue to accelerate in madness. Conditions aren't going to get better, because the economics of rock and roll are getting closer and closer to the economics of Big Business America." - Bill Graham
Pages: [1]   Go Up
 

Site Hosted By Ashdown Technologies, Inc.

Page created in 0.056 seconds with 21 queries.