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Author Topic: Eumig Audio Connector
Brian Hendel
Jedi Master Film Handler

Posts: 898
From: New York, New York
Registered: Jun 2003


 - posted April 17, 2018 07:33 PM      Profile for Brian Hendel   Email Brian Hendel   Send New Private Message       Edit/Delete Post 
Has anyone ever successfully looked for a way to turn the two prong eumig extension audio output jack into an RCA, phono, or mini plug? I'm trying to hook the audio output of my Eumig projector up to my audio receiver and don't know where to start. Any help would be appreciated. Please write back if you have any ideas or leads. Thanks! Brian

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Steve Klare
Film Guy

Posts: 6870
From: Long Island, NY, USA
Registered: Jun 2003


 - posted April 17, 2018 08:21 PM      Profile for Steve Klare   Email Steve Klare   Send New Private Message       Edit/Delete Post 
Hi Brian,

This is Eumig 800 Series, right?

If so:

The two prong plug is not the best way to go when you are talking about hooking into an amp: it's an external speaker jack and the signal is too strong. (There are interfaces available to make this work, though. A friend of mine uses one to connect a Kodak Pageant into an amp.)

There should be a pair of 5 pin DIN jacks up near the front of the machine along the bottom edge on the right side. One of these is a line level output and this is much better to input into an amp.

This is what I use.

This is worth doing, but there are obstacles. I had my external audio hookup working for a couple of years before I managed to get my Eumig to play nicely with it.

Something I ran into is the grounding on Eumig 800s is not that great, so it's very easy to get ground loop hum, especially if the Amp is grounded too. So if you hook it all up and the whole room is humming, I can help with that.

Another thing is Eumig has an astounding 50,000 Ohms series resistance with this output, this means with a 10,000 Ohm line level amp input, your signal has been cut down to 1/6 what it started out as. (You can call that "1/11th" if you drive two stereo channels together.)

I solved both of these by connecting the Eumig into a mixer, but that's something like step #8.

Maybe we should just start with step #1 and try to get you a cable!

Do you solder?

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All I ask is a wide screen and a projector to light her by...

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Brian Hendel
Jedi Master Film Handler

Posts: 898
From: New York, New York
Registered: Jun 2003


 - posted April 17, 2018 10:32 PM      Profile for Brian Hendel   Email Brian Hendel   Send New Private Message       Edit/Delete Post 
Thanks Steve - Yes, it's the 800 series. I guess I should try the other audio output. I have a three prong connector..will that work? It goes to an RCA connector so that would work.

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Steve Klare
Film Guy

Posts: 6870
From: Long Island, NY, USA
Registered: Jun 2003


 - posted April 18, 2018 08:21 AM      Profile for Steve Klare   Email Steve Klare   Send New Private Message       Edit/Delete Post 
Good Morning Brian,

The connector you need looks like this:

 -

-and it plugs into the Eumig in the jack shown at the lower right in this picture (The one next to it is an input for recording and PA).

 -

This was my first sound projector and it's been very good to me. If some day I have to stop doing all this and want to keep one thing up on a shelf to remember these times, this would probably be it. Odds are decent it will still work too.

Where it gets tricky is there are many, many cables available with this plug at one end and all sorts of stuff at the other (USB included...). You need to connect into just two pins here and have the other end be the right termination and pinout for your needs. I made my own: it could come to that for you!

How's your back feeling these days? I'm doing PT for mine: some guy has the idea that a 56 year old man should be able to put his foot behind his head (-from either side!) and I have to pay him to try to prove it! Don't get me wrong! I'm all in favor of flexibility, but let's not introduce any new joints to make it happen!

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All I ask is a wide screen and a projector to light her by...

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Maurice Leakey
Film God

Posts: 5730
From: Bristol. United Kingdom
Registered: Oct 2007


 - posted April 18, 2018 02:58 PM      Profile for Maurice Leakey   Email Maurice Leakey   Send New Private Message       Edit/Delete Post 
Brian
I think this is what you need.
https://www.ebay.com/itm/1-2m-5-Pin-Male-Din-Plug-to-2-x-RCA-Phono-male-Plugs-Audio-Cable-006110/192271225357?hash=item2cc442120d:g:nKAAAOSwY7VZigWq

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Maurice

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Steve Klare
Film Guy

Posts: 6870
From: Long Island, NY, USA
Registered: Jun 2003


 - posted April 18, 2018 03:17 PM      Profile for Steve Klare   Email Steve Klare   Send New Private Message       Edit/Delete Post 
Yes,

That should plumb you into a stereo amp, and for the money how wrong can you go? (This is a rare case where you can only blow something up if you really make an effort!)

The one thing to bear in mind is this is a stereo cable: Pins 3 and 5 are the two channels, pin 2 is the shield. On the Eumig monaural goes out on pin 3 and comes back on pin 2. Pin 5 is just flapping in the breeze, or maybe grounded.

-so when you connect this in you will have one live channel and one dead channel.

(but you have to start somewhere.)

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All I ask is a wide screen and a projector to light her by...

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Brian Hendel
Jedi Master Film Handler

Posts: 898
From: New York, New York
Registered: Jun 2003


 - posted April 18, 2018 06:28 PM      Profile for Brian Hendel   Email Brian Hendel   Send New Private Message       Edit/Delete Post 
Thanks guys - that looks like the right cable so I ordered it... so Steve it's only going to come through one channel, right? So I'll have to Y connect it again to get the mono sound out of the left and right channels. That should be easy.

Steve - Thanks for asking about my back. It's been OK... had surgery on my knee too which has been more painful. I did PT for a year now I'm doing stuff on my own. Yes, life after 50 totally sucks - don't believe otherwise!

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Martin Dew
Expert Film Handler

Posts: 198
From: Henley-on-Thames, UK
Registered: Jan 2017


 - posted April 18, 2018 06:56 PM      Profile for Martin Dew   Email Martin Dew   Send New Private Message       Edit/Delete Post 
Brian, I bought one of the 5 pin to RCA connectors a couple of months ago for my Eumig 820. It's plugged into an 1980s Technics midi-system receiver and matching speakers, and I'm getting cracking good sound from one speaker. The Technics system has nice tone but somewhat limited frequency response, so the Eumig seems to play nicely with it.

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Steve Klare
Film Guy

Posts: 6870
From: Long Island, NY, USA
Registered: Jun 2003


 - posted April 19, 2018 09:26 AM      Profile for Steve Klare   Email Steve Klare   Send New Private Message       Edit/Delete Post 
I guess you could even snip the connector of the dead channel off, bearing in mind you only get one shot at choosing the right one!

The next thing you need to think about is ground loops. This is something that is mostly a problem of the house wiring and it's beyond your control. It can be better or worse, it can be so slight it might not be a problem at all, but when it's bad, it can drive you back to the internal speaker without a second thought.

The long and the short of the problem is that between the third prong of different outlets there can be a voltage. It's not a huge voltage: couple of volts at the most. The problem is the signal you start off with is pretty slight as well and if you mix these together it can sound really bad.

-first time I plugged a projector into an amp, my wife heard what was going on and asked "What are you DOING?!!" (that bad...)

There are a lot of things you can do about it. Here are some easy ones:

Plug the projector and the amp into the same outlet. There are no ground loops without the loop.

Be mindful of what other grounds your amp is exposed to. My amp isn't self grounded (two prong plug), but it has an audio connection to my TV (also two prong), but the TV is connected to my cable box which is (well: "was") grounded to my cable TV provider. Eventually I put a ground isolator between the cable box and the coax going out to the pole.

There are also ground isolation transformers you can insert in the line between the projector and amp. Amazon sells them, so does Steve Osborne.

As I said, the grounding on Eumig 800 series isn't the best. It can play this ground loop game all by itself. There isn't a nice thick green wire running to the machine's frame. Instead it runs to the power transformer and the machine is then "grounded" through the transformer mounting bolts. This is not a solid connection and you can develop a couple of volts when it becomes compromised. Despite all the other anti-ground loop stuff I have, I developed a buzz in my speakers last summer when my Eumig was in the setup. I stuck a lock washer on one of these bolts to bite into the metal better and it went away. (I'll replace it with a star washer someday.)

-but then again you haven't even connected up yet: let's fix the problems you have when you have them!

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All I ask is a wide screen and a projector to light her by...

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Brian Hendel
Jedi Master Film Handler

Posts: 898
From: New York, New York
Registered: Jun 2003


 - posted April 19, 2018 08:14 PM      Profile for Brian Hendel   Email Brian Hendel   Send New Private Message       Edit/Delete Post 
Thanks Steve! I actually found a five prong audio cable in my bag of tricks before the one I ordered from Ebay even arrived...and... plugged it straight into my Bose receiver... and .... drumroll... it works! There's just a little hum but not too bad. I'm in the middle of building a very high-end home theater at my weekend place. But it's actually the "low-fi" components that are causing more trouble for the installers than the high-end stuff. They can't believe I am dealing with 8-tracks, cassettes, LP's, VHS, and of course... film! The Elmo GS1200 RCA cables are easy... but I'm sure the Eumig plugs would have baffled them. Now I can answer their questions... about this projector at least. If I have more trouble, I may hit you up for more advice. Thanks again, Brian

[ April 19, 2018, 11:11 PM: Message edited by: Brian Hendel ]

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Steve Klare
Film Guy

Posts: 6870
From: Long Island, NY, USA
Registered: Jun 2003


 - posted April 20, 2018 08:16 AM      Profile for Steve Klare   Email Steve Klare   Send New Private Message       Edit/Delete Post 
You're Welcome!

The Eumig 800s do run hummier, nothing that can't be dealt with though.

After I built my own audio system and it and my Eumig didn't get along at all, it became kind of a projector of last resort. Once I worked it out, it became a regular again. Last fall the sound board on my ST-1200HD went on the fritz and the Eumig took its spot for about 6 months while I straightened it out. (I DO like showing 1200 foot reels again...)

In a way, this is one of the best things I ever bought: I paid like 150 bucks for it almost 16 years ago and it's been ready to go to work every time I wanted it ever since.

-there's a lot of modern stuff I bought brand new since then that's been in the landfill for years!

It's one of the nice things about this gear in general: it's durable enough you can actually develop some kind of "relationship" with it. A lot of more modern gear basically becomes just another dead remote in the junk drawer pretty quickly. (WHY do we keep them?!!)

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All I ask is a wide screen and a projector to light her by...

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Reese Williams
Junior
Posts: 21
From: Chicago, IL, USA
Registered: Apr 2018


 - posted April 29, 2018 03:52 PM      Profile for Reese Williams   Email Reese Williams   Send New Private Message       Edit/Delete Post 
this is a very interesting topic

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