Datalink for older Vs newer Beograms

[CharlieWednesday]

I was not sure if the Beomaster 4500 I got recently had the optional RIAA installed, so I connected my Beograms 9500 to it to test. I got a very quiet sound so it answered my question (no preamp), but I also noticed that there was no datalink – when I pressed Phono on the Beomaster the turntable did not start, and when I pressed play on the Beogram the Beomaster did not go to Phono. I did set the Beomaster to use that input as Phono. By the way.

I could have sworn I’d seen a previous post where it said that the Datalink signals are different in later Beograms, but can’t find it now.

Is this explainable?

• This topic was modified 1 day, 11 hours ago by CharlieWednesday.

Location: Liverpool
My B&O Icons:

[Madskp]

The datalink signals are the same for Beograms with or without Riia.

However the pin used in the DIN connector differs.

Without Riaa datalink is on Pin 6

With Riaa datalink is on Pin 7

I think it was made this way to avoid starting a Beogram with Riaa when connected to a Beomaster/Beocenter with built in Riaa

Also For the Beograms with built in Riaa you can connect it to a CD socket (that use pin 7 for datalink) and control it with CD commands.

If neede you can reverse the pins and still control the Beogram

Location: Denmark

[CharlieWednesday]

Ah, thank you, that’s really helpful.  I knew I’d read something like this before but couldn’t find it.

Reason I ask, I’ve got hold of a Beomaster 4500 and Beogram CD 4500, both of which need repairs but they are in fantastic cosmetic condition.  I was thinking that, with some clever wiring, I could connect my Beogram 9500, routing the audio signals through my dedicated pre-amp, but also somehow connecting the datalink pin to get that full Beolink action.  Knowing what you’ve told me, this will be possible!

• This reply was modified 1 day ago by CharlieWednesday.

Location: Liverpool
My B&O Icons:

[Madskp]

Yes that should be possible. I have got hold of a RiAA with 7 Pin Din connectors where the datapins are reversed throug the unit. That makes it very easy to get the conttol part along with RIAA

Location: Denmark

[Guy]

Madskp wrote:

I have got hold of a RiAA with 7 Pin Din connectors where the datapins are reversed throug the unit.

Is it this one?  https://shop.oneremote.dk/shop/69068-riaa-amplifier/4199-riaa-ii/

(I assume that it swaps the datalink connection from pin 6 to 7)

• This reply was modified 1 day ago by Guy.

Location: Warwickshire, UK
My B&O Icons:

[Madskp]

Guy wrote:

Madskp wrote:
I have got hold of a RiAA with 7 Pin Din connectors where the datapins are reversed throug the unit.
Is it this one?  https://shop.oneremote.dk/shop/69068-riaa-amplifier/4199-riaa-ii/

(I assume that it swaps the datalink connection from pin 6 to 7)

No it’s a RIAA from something called Flint Products type 4587.

I found it second hand. Never heard of the brand before, but have been able to find adds for couple of other models with the same brand, but with other connection types.

This one however was ideal because of the 7 pin DIN connectors. Initially I thought I had to make the datalink connections myself, but it seems this was intended for use with B&O with datalink.

Location: Denmark

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