zebra50

getting inside a gefell UM70....
« on: February 12, 2005, 10:18:18 AM »
Hi,
Has anyone figured out how to crack open the head assembly on a Mictotech Gefell UM70? I want to check/clean th capsule but I can't see any screws.....

this is the type of mic...  

http://www.novamusicproductions.com/GefellUM70s.jpg

Thank you
Stewart
Ribbon microphone services
http://www.xaudia.com
Microphone blog


getting inside a gefell UM70....
« Reply #1 on: February 12, 2005, 10:53:58 AM »
Stewart,
On the older version with plastic pattern changing ring, there were two pins (one either side) that had to be pulled out, but not without serious grief.

BTW I've got your connectors.

peter
http://www.lazpro.com
I reserve the right to not sell to idiots

gang of elk

getting inside a gefell UM70....
« Reply #2 on: February 12, 2005, 10:57:50 AM »
i tried to open my umt70s (same body) and gave up.  did you remove the rotating switch?  when you do you'll see some countersunk flat-heads under the capsule.  not sure if those release the grill+capsule or just the capsule.  i was afraid of releasing the capsule w/o being able to get the grill off so i stopped right there.  

lemme know if you figure it out..

 :guinness:

getting inside a gefell UM70....
« Reply #3 on: February 12, 2005, 11:46:48 AM »
Stewart,

I have a UM71, single pattern, there were rubber plugs that covered the screws. As Peter said, it was not without grief, and it hasn't worked well since I put it back together. Be careful.

Good luck!
Seth

The definition of insanity: "Hey, this thing could be really cool - if I had the money to fix it up, which I don't, but if I did it could be really cool - if I had the time, which I don't, but

gang of elk

getting inside a gefell UM70....
« Reply #4 on: February 12, 2005, 12:21:01 PM »
seth, is it the switch that's not working right after putting it back together?  

those 2 tiny allen pins determine the amount of friction placed on the switch's rotation.  try adjusting the tension on them, it's not unlike adjusting the steering bearings on a bicycle.  sounds like yours may be too tight or too loose.

EDIT:  seth never mind, i see you have a single pattern.  :oops:

zebra50

getting inside a gefell UM70....
« Reply #5 on: February 12, 2005, 02:49:03 PM »
Thanks for the tips everone. It is not my mic so I'll let the customer take the risk!
Stewart

Peter - those connectors will be most welcome  :wink:
Ribbon microphone services
http://www.xaudia.com
Microphone blog

gyraf

getting inside a gefell UM70....
« Reply #6 on: February 22, 2005, 09:33:46 AM »
Gefell MT71 schematic added to Gyraf/Resources:

http://www.gyraf.dk/schematics/Gefell%20MT71S.gif

Jakob E.
..note to self: don't let Harman run your company..

Gus

getting inside a gefell UM70....
« Reply #7 on: February 22, 2005, 09:48:55 AM »
looks like a better mc012 circuit design.

getting inside a gefell UM70....
« Reply #8 on: February 22, 2005, 04:41:30 PM »
Quote from: "gyraf"
Gefell MT71 schematic added

Thanx a lot, next not boring schemo for my collection
I am now Ing (M.Sc. equivallent) :-) :-) :-)
... After nearly two hour (for me) not boring exam today.
                        xvlk

gyraf

getting inside a gefell UM70....
« Reply #9 on: February 23, 2005, 02:24:30 AM »
Quote from: "xvlk"
I am now Ing (M.Sc. equivallent) :-) :-) :-)
... After nearly two hour (for me) not boring exam today.
                        xvlk


Heey.. That's great news..! Congratulations, Xvlk!  :sam:  :sam:  :sam:

Jakob E.
..note to self: don't let Harman run your company..


zebra50

getting inside a gefell UM70....
« Reply #10 on: February 23, 2005, 05:58:19 AM »
Excellent! That's so cool. Congrats.

 :thumb:
Ribbon microphone services
http://www.xaudia.com
Microphone blog


 

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