Saturday, June 25, 2011

B&O Beogram 4002 Turntable Output Adapter

I found a great B&O turntable on Craigslist as a replacement for my rather old and crappy deck that I have been using.

This is one of the older versions of the 4002 and it really is a wonderful piece of electronics. It was actually added to the Museum of Modern Art back in 1974. B&O makes such unique items and I am proud to own this.

It is a bit dirty and I can hear that there is some trouble with the gear mechanism that controls the tracking device. I am sure that once I get into it, it will just need to be greased or realigned. I am excited to get it cleaned up and up on the stereo rack.

The only issue with it is that the guy I bought it from forgot the output adapter. The B&O terminates with a 5 pin din cable that does not work with regular stereo gear. It comes with this 5pin socket to RCA adapter.

Before I dug into the unit, I wanted to make sure that it worked well enough to warrant it. The adapter cables on eBay tended to be in the $20 -$40 range and it seemed to be a bit too much for me.

I did some experimenting and found that the output fits a Midi jack. I had an old piece of Midi gear in my back closet that had a ton of sockets on it. So, I pulled one of the sockets out, cut up some RCA cables, found a pre used project box and went to town!

We basically set the output up into a pre/power amp then into some speakers and plugged the turntable into the midi jack. Then we just started matching wires to pins until we heard something in stereo.

Once we got the configuration right, we soldered all the points and closed it up.

When all is said and done, it works great!


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