Hi, i just install my father's beogram 4000 in my living room. It's in mint condition (first-hand ;-)) and i just had to change the bulb for the 33 speed adjustement screw, do some setup (heigt adjustement, cleaning) and everything working perfectly!

BUT i can't connect it to my Besound at because i don't have a riaa phone preamp for the moment ( looking at the REGA fono mini or cambridge audio 540/640P)

For the ground (earth) do i need to change the power plug for a grouded one? The beosound 9000 has no ground connection. If so, should i make a ground connection between the beogram and the phono preamp though?

Last question, do you think it's worth to change the din cable for a direct RCA cable instead of original cable and din to RCA adaptator cable?

Very nice Beogram - in my view the best! You do not need to change the powerplug. You should also avoid chopping off the DIN plug as this will decrease the Beogram's value. I would suggest having a look at this site for a suitable RIAA or ask Lee at Lifestyle AV.

So the beogram don't need ground/earth wire? 

just a pics of the 6v-30ma bulb that i've changed.

Suggest you buy your adapter cables from www.soundsheavenly.co.uk . His cables maintain the ground connection so you will not need a separate earth wire.

See here

http://soundsheavenly.co.uk/bando-riaa.htm

That is where my link goes!