I'm wondering if u guys have any recommendations where to buy used gear, other than eBay, the forum here doesn't seem to have posts newer than 202 

I have a related question...although I should probably just try and see what happens.

I have BM6500 (without RIAA) and a (white) BG5500. Now I know if I connect one to the other there will not be enough gain or proper RIAA equalization, that I know.

But will the BM still be able to control the BG? I am asking because looking at the schematic (which I tried to attach unsuccessfully) a BM6500 w/o RIAA sends remote control commands to both pins 6 and 7 of the phono plug but if RIAA is installed, you are supposed to snip the pin 7 connection off. I know from experience that when mysterious things like that are said on a B&O schematic, there is always something “deeper” going on. 

I suspect it should be OK. The extra 7 connector presumably tells a BG with RIAA to turn on its RIAA on or something so that if the BM also had RIAA, you do not end up with them in series. Also I guess a BG with RIAA can then be used with any other amp because it will behave as if it did not have RIAA without that signal. 

Makes sense?

Hi toptip,

If you connect an early (non-RIAA) Beogram to a newer Beosystem via a separate pre-amp then you won't usually have remote control of the Beogram.  However, it is possible to build a wiring loom to retain the remote control functionality - please feel free to get in touch via my sponsor link at the foot of the page if you would like more details of this option.

Kind regards, Steve.

Thank you. I did some experimenting myself. I am only planning to use the Beomaster 6500 as a control center and not really have any audio signals going through it. To that extent I think a loom like the one I drew below should work. I do not yet know if the ground for the control signal is the DIN plug jacket or pin 2 (I drew both below, with question marks). But I should be able to figure that out with a bit of further experimenting:

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