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Old 23rd February 2015, 09:14 PM   #1
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Default B&O Beocentre 2000 Cartridge/Tonearm Replacement

Ahoy all,

I picked up a Beocentre 2000 for a song that was apparently not working, thinking it would be a good present as a first turntable/system for a friend. The tonearm was not doing what it should, but I've fixed that (a bit of trouble with some old lubricant and zero-ing issues).

However, now I discover that the cartridges are obsolete and clever old B&O made them proprietary. Not being willing to fork out hundreds of pounds on the off-chance I can pick up an old cartridge (poor student that I am), is there a chance that the arm can be adapted for some more modern, cheaper and available cartridge, or does anyone have experience with using another arm. Or suggestions in general - thanks for any replies!
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Old 23rd February 2015, 09:54 PM   #2
sreten is offline sreten  United Kingdom
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Hi,

The arm can be adapted if you have the skill, to 1/2" slots.
(Conversion to TP4 is possible, but get the geometry right.)
Its just a question of making a headshell and rewiring.

I'd suggest :
Amazon.com: Buying Choices: Audio-Technica AT92ECD Universal Replacement Magnetic Phono Cartridge

A good cartridge at a bargain price. Suits low mass arms.
TP4 with a 1/2" adaptor. Check they will ship to the UK.
Beats the hell out of stumping up 375.

rgds, sreten.
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Old 24th February 2015, 09:39 PM   #3
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Thank you sreten, that makes me feel hopeful!

I've looked over the link you posted and if I'm interpreting you correctly, I take off the headshell that is currently on the arm, manufacture a headshell with a plate for the 1/2" screws, then attach the Audio-Technica. As it has replaceable styli, it could be fitted permanently, if I fix the four wires to the TP4 pins inside the headshell.

What is it about this method that means the geometry is less difficult than a TP4 conversion? Is it that the two screws allow left-right twisting when the cartridge is installed, and it is then never touched, whereas with TP4 I'd have to set up the sockets properly as once plugged in the cartridge is stuck?

Have you got any reference drawing links? I'm not at all well-versed on the technicalities of tonearms and the required alignments! However, at the moment I have access to a well-equipped workshop so have high hopes.

Thanks again!
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Old 25th February 2015, 12:47 AM   #4
sreten is offline sreten  United Kingdom
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Hi,

Yes. TP4 has to bang on right, whilst 1/2" allows some vagaries,
with different cartridges mounting to tip length and with shims
some variation of cartridge tip to top height, which varies more.

The 1/2" adaptor has a further 4 pins, so it you used that,
then any TP4 cartridge would fit, and theoretically need
no tonearm adjustment in swapping TP4 cartridges.

Most of it is common sense, i.e. a parallel to the plane
armtube, but go to vinylengine for tracking geometry.

I've some posts there saying you need a good inner
point and any reasonable outer point is good enough
two point geometry if you have some constraints.

rgds, sreten.
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Last edited by sreten; 25th February 2015 at 12:51 AM.
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Old 25th February 2015, 11:07 AM   #5
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Thank you. I'll head over there and be back when I've got my head around it all.

One last thing - on that cartridge link photograph, the four pins at the back are the adaptor or the cartridge? There are no other views available so I can't quite work out the arrangement.

Are adaptors available separately or always combined with a particular cartridge/stylus combination? I only have experience with the Goldring MC that came with my RP3, the interchangeable stylus on my Pioneer and the ancient reversible thing on my Lenco!
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Old 25th February 2015, 09:35 PM   #6
sreten is offline sreten  United Kingdom
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Click the image to open in full size.

Hi, The above should explain, rgds, sreten.
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Old 25th February 2015, 10:25 PM   #7
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Thank you again sreten.

I have been perusing vinylengine for the last few hours and have the basics down I think. Now to work out how the arm comes apart...
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