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Vintage Tape (Audio), Cassette, Wire and Magnetic Disc Recorders and Players Open-reel tape recorders, cassette recorders, 8-track players etc. |
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19th Nov 2019, 8:59 pm | #1 |
Retired Dormant Member
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Grundig GDM 312 microphone.
Hi, I just find an old Grundig GDM 312 microphone.
It is a din connection ... I'd like to use it on an amp with XLR or JAck connection. There are 4 cable in the DIN : 3 pin and one solded to the DIN case. The 3 pin are numbered 1 2 3 ... can someone explain me the wiring diagram to connect the cable to an XLR or a JACK. I can't open the microphone and doesn t know wich cable is what ... |
19th Nov 2019, 9:59 pm | #2 |
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Re: Grundig GDM 312
These mics incorporate a transformer. It's probably wired similarly to the drawing in post #9 in this thread:-
https://www.vintage-radio.net/forum/...d.php?t=101561
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Graham. Forum Moderator Reach for your meter before you reach for your soldering iron. |
19th Nov 2019, 11:01 pm | #3 |
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Location: Brussels, Belgium.
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Re: Grundig GDM 312 microphone.
Thx..
So is it possible to connect it with an XLR and use it with a modern mix table? Sorry I m a newbie, I don't even understand what is dual impedance... |
20th Nov 2019, 8:18 am | #4 |
Dekatron
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Location: Kington, Herefordshire, UK.
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Re: Grundig GDM 312 microphone.
This is a dual impedance dynamic rather than a condensor mic. I'd try connecting the wire from pin 2 to the sleeve of the jack and that from pin 1 to the tip. Alternatively, the pin 2 wire to pin 1 of the XLR and the pin 1 wire to pin 2 of the XLR. Then link pins 1 and 3 on the XLR, as the mic is unbalanced.
In either case, join the pin 2 wire to the screen of the cable. |
20th Nov 2019, 6:16 pm | #5 |
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Location: Brussels, Belgium.
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Re: Grundig GDM 312 microphone.
Thank you... I'll try this this evening... So the wire of the pin 3 (DIN) stay free (not connected to XLR)?
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20th Nov 2019, 7:01 pm | #6 |
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Re: Grundig GDM 312 microphone.
So
Din 1 ==> 2 xlr Din 2 ==> 1 xlr Din 3 ==> free unused Cable screen ==> 1 XLr XLR 3 ==> XLR 1 So 3 cable on XLR 1, nothing on XLR 3, and din 3 free Exact? |
20th Nov 2019, 8:35 pm | #7 |
Dekatron
Join Date: Jul 2008
Location: Kington, Herefordshire, UK.
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Re: Grundig GDM 312 microphone.
Yes, that's right. The feed to 3 Din is an alternative output at a different impedance.
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20th Nov 2019, 8:44 pm | #8 |
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Location: Brussels, Belgium.
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Re: Grundig GDM 312 microphone.
Thank you
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