8mm Forum: Wiring a 2-pin DIN Plug

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Posted by Janice Glesser (Member # 2758) on October 18, 2013, 12:59 AM:

I have this 2-pin DIN plug that I would like to solder wire onto and use for an external speaker connection. Can any of you audiophiles tell me where to attach the wires?

Posted by Martin Jones (Member # 1163) on October 18, 2013, 02:20 AM:

Yes, Janice. One wire to 1, the other to 2. It doesn't matter which is which (unless you are connecting Stereo Speakers, when you connect the marked wire on each cable to the same pin on each plug). 3, 4,5 is just a strain relieving clamp you can bend round the outside of the wires to hold them firm against pulling the connections off.
Martin

[ October 18, 2013, 05:07 AM: Message edited by: Martin Jones ]

Posted by Janice Glesser (Member # 2758) on October 18, 2013, 11:29 AM:

Perfect Martin...just the info I needed. Thx.

Posted by Janice Glesser (Member # 2758) on October 18, 2013, 04:06 PM:

Ok...The photo shows I'm making a cord that has a balanced XLR plug on one end and a 2-pin DIN plug on the other. After stripping the outer wire...there are 3 wires inside..1)Black 2)Red 3)Silver Stranded Wire. I'm guessing the Red and Black wires connect to the number 1 and 2 terminals on the above photo...but what do I do with the stranded silver wire?

Posted by Martin Jones (Member # 1163) on October 18, 2013, 04:26 PM:

Either cut it short or connect to 3,4,5. In this case is does nothing... though an XLR outlet is unusual for external speakers????

Posted by Janice Glesser (Member # 2758) on October 18, 2013, 04:37 PM:

Martin....I use a Direct Box from my projector to the speaker which takes an XLR plug.

....and here's the finished product. I first tried it on my Yashica P810 (love this projector). It worked great...nice clean audio. Next I'm going to try it with my Eumig 810D [Smile]

Martin...I can't thank you enough for helping me out [Smile]

[ October 18, 2013, 06:45 PM: Message edited by: Janice Glesser ]

Posted by Paul Adsett (Member # 25) on October 18, 2013, 08:13 PM:

That Janice is an inspiration. She is not afraid to tackle any job! [Cool]

Posted by Pasquale DAlessio (Member # 2052) on October 18, 2013, 09:03 PM:

Janice is the bomb! Techno mama!

Posted by Roger Shunk (Member # 2836) on October 18, 2013, 09:49 PM:

That is why they call her the Phenomenal Film Handler!!

Posted by Janice Glesser (Member # 2758) on October 18, 2013, 10:48 PM:

OH YOU GUYS! [Roll Eyes]

Posted by Maurice Leakey (Member # 916) on October 19, 2013, 12:08 AM:

Why does the speaker lead use a screened cable?

Posted by Janice Glesser (Member # 2758) on October 19, 2013, 02:22 AM:

Maurice...Not sure what you mean by "screened cable"?

Posted by Pasquale DAlessio (Member # 2052) on October 19, 2013, 03:08 AM:

The "screened cable" is used as a ground wire to reduce hum.

Posted by Maurice Leakey (Member # 916) on October 19, 2013, 05:04 AM:

Janice
The screening bit is what you refer to as "stranded silver wire", and further explained by Pat to be used for what we call earthing, but referred to in the US as grounding.

Posted by Janice Glesser (Member # 2758) on October 19, 2013, 11:27 AM:

So are you asking me why there is a grounding wire? All I can tell you is that the cable that I used was previously used for a microphone. I just removed the mic plug and substituted the 2-pin DIN plug. it was not speaker wire.

Testing the connector with my Yashica there was no hum...however lots of hum with the Eumig. I cut the grounding wire off and did not attach it to the plug. Maybe I should have.
[Frown]

Posted by Maurice Leakey (Member # 916) on October 19, 2013, 11:56 AM:

As the lead was for a microphone would explain why the cable was screened. This is to avoid hum.

However, the Eumig is a well-known "hum maker" so may-be there is nothing you can do to reduce the hum.

In the 70s I had a Emumig 807D which I used for public shows, but there was not a lot of sound output, always running on max. About that time a British firm produced a "Eumig Amplifier". It was quite small as to height but about the same overall size of the projector. The projector just sat on top. However, whilst it did indeed amplify the sound it also increased the notorious Eumig Hum.

The amplifier was a complete waste of money.

Posted by Steve Klare (Member # 12) on October 19, 2013, 12:32 PM:

The grounded connection is to shield the wires inside from picking up stray magnetic fields. These induce electrical noise that mixes in with the signal you want and when you pass them through an amp the noise gets bigger and nastier. This is a big deal when you are starting with a very low level signal like a microphone produces.

The signal out to a speaker is as amplified as its ever going to get, so you usually don't need shielding on speaker wiring. My amp is in the back of the house and my speakers are in te front of the house with maybe 40 feet of unshielded wiring in between: as quiet as can be.

I've always wondered if the problem with 800 series Eumigs is that the power transformer (and its magnetic field) is right on the opposite side of the chassis wall from the sound head. I'm sure the chassis provides some shielding, but other than that you couldn't get the transformer much closer to the heads if you really wanted hum!

Posted by Janice Glesser (Member # 2758) on October 19, 2013, 12:43 PM:

I think I'll just live with the hum on the Eumig. The audio is plenty loud even with the volume turned down. I only use the Eumig for Regular 8mm and I have very few R8 sound reels.

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