[Weebyx]

Peter wrote:

Very clever! It amazes me how resourceful members are! I confess that I always clean the record before playing it as usually use a 20CL and any dust simply collects on the needle. And my best deck is completely manual. However clearly there will be demand though maybe a non RIAA version could also be popular.

It is possible to bypass the internal RIAA 🙂

 

It is possible to bypass the internal RIAA 🙂

[Weebyx]

I have made this 🙂

Beogram 4002/4004 RIAA/Remote control Upgrade 🙂

It is making the BG4002/4004 act like a BG7000 with the modern Datalink beomasters.

/Weebyx

[Weebyx]

My design is build on Texas Instruments Reference RIAA design, they already use caps in direct signal path, even B&O’s own RIAA, and others, dont use dual power 🙂

I set out to build a RIAA amp that most people finds “good enough”, and up until now, everyone has been very happy with how it sounds.

I even compared TI’s RIAA curve with this, and they are almost identical.

But yes, there will always be ways of optimizing RIAA’s, and no 2 sound the same, and on top of that, 2 people listening to the same RIAA, will also always agree.

 

[Weebyx]

On a 4004, it is 100% plug and play, no soldering or anything. A 4002 is also plug and play, however it needs a new DIN cable, as it is missing pins 6 and 7 for the datalink connections.

Where do you live ? Currently the only way of getting it, is through me here in Denmark.

[Weebyx]

I am running powersupply to opamps via LDO voltage regulators, and actually NOT running dual supply. It is running 0-12v on opamps.

[Weebyx]

This is because it has been configured to use 1-way mode.

If you have a 2-way Beomaster, you can enter setup and components in the Bl7000 menu, and then remove all products under AUDIO, and add them again. If your BL7000 has working 2-way receiver, it will go back to the standard 2-way screen again.

 

/Jacob

[Author]

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