Wanted: Volunteer Belt Tester for Beomaster 6000/4

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Dillen Posted: Tue, Sep 22 2015 6:20 PM

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I am currently working on reproducing the belts for the
Beomaster 6000 quad receiver and I would like to have a second opinion.

I will send you a set of belts (5 pcs).
You will mount and test the belts right away and report back to me about your findings,
results and your opinion about quality, functionality and fit.
If more people respond, I reserve the right to pick rather than just grab the first.

Needless to say, you get to keep the belts.

PM or email me.

Martin

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Beolover replied on Tue, Sep 22 2015 10:40 PM

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Hi Martin,

Is this about the indicator bands (I'd love to get some of those - one of mine is a bit crinkly) or the drive belts that move the potentiometers?

The EPDM rubber (ethylene propylene diene monomer) o-rings that I used as drive belts seem to perform admirably. I use my 6000 every day...see here for specifics:

http://beolover.blogspot.com/2014/05/beomaster-6000-4-channel-rebuilding.html

Rudy

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Dillen replied on Mon, Sep 28 2015 7:32 AM

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I admire your work, Rudy., and your blog page is one of very few pages, I visit regularly.

And thanks for the tip but if I'm not mistaken they are gaskets. They are made to seal, not to provide
friction and transfer torque.

Ethylene is a hydrocarbon. It may encourage absortion of airs moisture (think Butyl - used in speaker foams).
Propylene is also a hydrocarbon, which at room temp prefers to be a gas. It will sneak away given the chance.
Best for closed compartments, I think. As in seals.
In my opinion not the most stabile composition for a component meant to work and flex around in
free air constantly - though admittedly, the Beomaster 6000/4 may not be the most belt-rotating thing
in the B&O back-catalogue. ;-)

Anyway, I prefer the belts to not stretch and losen with age, have as little memory effect as possible and
be made from a chemically stabile material, not becoming brittle with age, not hardening on the outside,
not turn into a gooey sticky mess, retain their friction with wear and contain no softeners so they won't be
prone to attack or interact with other plastics they may come into long-term contact with.

I could use one more tester, - anyone ?

Martin

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Beobuddy replied on Mon, Sep 28 2015 8:27 PM

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I have a spare BM6000 standing here ( it's mine, not for any customer).

It needs a complete overhaul, so these belts would be welcome. I've already tested with another 2 different belts.

BTW, I use a rubber fuelhose (6mm in diameter) to attach the motor with the rest of the gear. The original tube becomes to wide and starts slipping.

The advantage of this type of fuelhose (used with carbarettors) is that is flexible, handles easily the rotating force  and doesn't break or crack. 

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Dillen replied on Wed, Sep 30 2015 8:20 AM

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André,

Thanks, you have email.

Martin