Hi.

You don't need to open the connector. The two pins are actually screws so you can simply un-screw the two with a very small screwdriver. There is a slot at the end of the pin. When you have the connector at hand you will see. I wouldn't use pliers as it might bend the surrounding pins. And remember to pack the two loose pins carefully somewhere safe! They are very small and easy to lose.... 😳

majand wrote:

Another thing, is there some gimmick to connect Beogram 9500 to an Ouverture so, that it can be operated with Beo4? I'm going to use Pro-Ject Phonobox in between as pre-amp.

I was going to say the Ouverture AUX socket has no datalink connections, so it won't be of any assistance - but actually it seems it does. So you would have to somehow route the datalink signals past the 3rd party pre-amp, which obviously doesn't know anything about them.

I don't think anything like this is available off the shelf anywhere, but it would be possible to construct the adapters. You can test this by just plugging the Beogram straight to AUX - the sound will be useless, but you'll see if the remote control would work.

tournedos wrote:

You can test this by just plugging the Beogram straight to AUX - the sound will be useless, but you'll see if the remote control would work.

I don't think that would work as the Aux socket is Line level and the Beogram 9500 needs a RIAA amplifier.  I know what you are going to say... that you already said the sound will not come through.  But it is more than that.  Beograms without Line level output have their datalink pin on the opposite pin compared to Line level units.  So the Beogram 9500 datalink pin would actually be connected to the Aux link pin of the Ouverture and not the datalink, so I doubt it would work.

But if you make a special cable with the datalink signal crossed over between the pins and the audio going through a RIAA it should work.

ridax wrote:

But if you make a special cable with the datalink signal crossed over between the pins and the audio going through a RIAA it should work.

I'm going to solder the cable anyway, so i'll fetch some 7 pin DIN's and cross the link pins in one cable and bypass the audio through the pre-amp using RCA.

Would be more flexible in testing to use RCA also to link pins, but DIN is more B&O. Let's see what happens.

Thank's for the info!

Pekka

Now, to make this more complicated, and interresting, I'm going to add some kind of a audio switch, also, to the AUX of the Ouverture. This, because I have my iMac also connected there and want to switch between iMac and Beogram.

If I do, as I intended above, connect link pins straight with a cable, and the switch is in iMac position, pressing A.AUX will start the Beogram also, I believe.

So, this leads to building the switch also, so the link will be cut when in "non-Beo" position. On the positive side, less adapter cables, since I can put DIN, RCA and jack connectors straight to the switchbox, and can do the crossing of the link lines inside, so the cables can be straight.

I guess a good quality rotational, multi position, switch would be enough? No grounding or termination of the loose ends needed?

Any suggestions welcomed!

Pekka

I took a look in the relevant service manuals, and as Ridax says, the datalink pins change role depending on whether the Beogram has an internal RIAA amp or not. BG9500 doesn't, so the data pin is 6, and you can leave 7 disconnected (it goesn't go anywhere in the Beogram, anyway).

And the Ouverture makes this easy: it has both 6 and 7 connected to Datalink in parallel, so you can simply run straight pin 6-6 and forget about 7 on both ends.

However, one thing I didn't think originally is the actual commands sent: will the Ouverture send a "play" command the Beogram can understand when you select aux (+ go/play) from the remote? This isn't covered in manuals... I tried swapping Beogram and Beocord on my BS6500, and the remote control didn't work then, but I'm not sure if this proves anything about your setup.

But it's easy to test, just connect the datalink signal and ground, and try it. I suggest you keep both units unplugged from mains while making and breaking the connections, the datalink interfaces don't have very elaborate protection for overvoltages and such.

When constructing a switch, you don't have to terminate the signals anyway, just keep the signal grounds connected together at all times (i.e not switched).

Are you sure that the Ouverture has the datalink pins in parallell on pin 6 and 7?  If I recall correctly it has Datalink on one of the pins and Aux link on the other.  But I can't find the ouverture service manual, so can't check.

ridax wrote:

Are you sure that the Ouverture has the datalink pins in parallell on pin 6 and 7?  If I recall correctly it has Datalink on one of the pins and Aux link on the other.

Not 100% sure as I've never seen one myself - but the schematic in the service manual shows it:

(aaaargh. I hope the forum's attachment feature gets working soon...)

Hello ridax & tournedos,

seems both of you are correct somehow.

My ouverture manual shows the schematic tournedos attached above. Although the preface shows an Audio Aux socket with Pin 6 saying "Datalink" and Pin 7 "not used".

My BC 2300/2500 manual has Pin 6 marked as AAL and Pin 7 as DL.

Will have to find out myself as I'm fitting an original B&O RIAA PCB into my BG3300 that hasn't one. But I want to avoid an extra box with "bypassing" of the Datalink signal and requiring an external power supply.

HTH,

  Gunther