I have just bought a Leak 2001 Transcription turntable which I would like to do up. The suspension is kind of unique as it uses 3 silicone fluid filled balloons and 3 rubber grommets (thick rubber rings). The 3 balloons look okay but I am replacing them with KAB Sorbothane pods.
However I am still looking for new mounting hole grommets. Does anyone have an idea where to buy those? The rubber of the originals is kind of soft.
However I am still looking for new mounting hole grommets. Does anyone have an idea where to buy those? The rubber of the originals is kind of soft.
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Suggest you check vinyl engine on this, thread on "Leak 2001 Silicone Bags', one poster recommended as possible replacement very similar mount in which a spring is mounted/encased in a silicone gel filled rubber bag. To get lowest Fr, loading should be 90% of capacity. The advantage of spring is, it's linear in displacement per unit force, unlike rubber. And the silicone will damp the spring very effectively. And... these are apparently made in France by Paulstra Hutchinson.
First link in ck256's post will take you to UK vendor.
My own DIY TT uses springs in silicone filled wells, so I'm a fan of this approach
First link in ck256's post will take you to UK vendor.
My own DIY TT uses springs in silicone filled wells, so I'm a fan of this approach
Issigonis/Moulton's theory on the BMC Mini suspension was that non-linear springing allows extra-soft (low Fr) for small displacement, while not bottoming on sharp potholes or elbow-bumps. (Hydrolastic came later.)
But of course practicality defeats theory.
Interestingly, Moulton went on to provide his 'New Series' Moulton bicycles with a rear suspension system marketed as 'Hydrolastic'.
The bicycle suspension consisted of a rubber cone spring with an internal fluid filled chamber to provide damping - similar, but not identical, to the 'Leak 2001 Silicone Bags' mentioned earlier.
The bicycle suspension consisted of a rubber cone spring with an internal fluid filled chamber to provide damping - similar, but not identical, to the 'Leak 2001 Silicone Bags' mentioned earlier.
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Freebee, no, I built wells in which the springs sit which I filled with silicone fluid, which I sourced from a RC model shop, I used formula found on line to mix various viscosities. I found audible differences, settled on final viscosity by ear(either 1100 or 1500cSt, not sure which, now!).I believe the top of the line Basis tables used something similar.