beyerdynamic m260 - transformer wiring
« on: October 11, 2019, 12:09:24 PM »
Hi,
I received an old Beyerdynamic m260 ribbon mic in very bad condition, all the transformers wires has chopped.
It seems like there's 3 wires on the secondary, the dc resistance between two ends of the secondary are about 30 ohms and the third wire is center tapped (it measures 15 ohms between the third wire to each of the other secondary wires).
I've looked on the M260 datasheet and couldn't find any center tapped output transformer.
http://www.coutant.org/beyerpdf/m260n.pdf
How should I wire this output transformer?
Should I connect the center tapped wire to the mic chassis or leave it disconnected?


Youngwhisk

Re: beyerdynamic m260 - transformer wiring
« Reply #1 on: October 11, 2019, 01:44:55 PM »
There is a diagram in the 2nd post on this page:

https://groupdiy.com/index.php?topic=50693.0

Re: beyerdynamic m260 - transformer wiring
« Reply #2 on: October 11, 2019, 02:07:46 PM »
There is a diagram in the 2nd post on this page:

https://groupdiy.com/index.php?topic=50693.0
Thanks,
So for 200 ohm operation I should connect the blue and yellow (Bl and Ge) to the connector and leave the green (Gn) unconnected?

CJ

Re: beyerdynamic m260 - transformer wiring
« Reply #3 on: October 11, 2019, 05:27:10 PM »
that is correct.
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html

Re: beyerdynamic m260 - transformer wiring
« Reply #4 on: October 11, 2019, 05:31:09 PM »


 

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