A Copernican View of the Turntable System

Lew, I agree with you that idlers need a plinth thats why I said it wouldn't be a great idea. Now a idler with a plinth and arm pod that is the question.

Chris, were those email request of guys wanting an arm pod for idlers that were nude or with a plinth?

I'm surprised nobody but Halcro has asked more about the ingenious arm pod Corby made. Think you can get him to elaborate a little more of the breakdow with the micrometer, maybe pics. For most arms, having precision VTA would be a plus.

http://forum.audiogon.com/cgi-bin/fr.pl?eanlg&1294870073&openfrom&370&4#370

Like you said manufactured tonearm prices are expensive especially if you would need more than one.

Couple of fine example of the cheaper ones out there.

http://www.ttweights.com/catalog/item/7725503/8678734.htm

http://www.ttweights.com/new_power_arm_pod.html

Notice the second one with the dissimilar materials stainless, lead and derlin. I'm sure this was tried and tested so something to note that there is probably some canceling going on there.

Other than cancelation going on lead would add mass while the derlin should be easy to machine.

Brad

Nikola - if I was in your position with a tuned up virgin Sp10mkii in my house and that Reed armpod and tonearm already in place I would not be able sleep until I put them on a small temporary stand with appropriate height footers under the sp10 just to hear what it was like.

Chris, Nandric and Brad are quite correct in this thread being primarily about isolated arm-pods, their cost and availability.
The 'Nude Turntable Project' thread combines the support of the nude table together with the design and fabrication of bespoke arm-pods.
Corby's solution to an adjustable-height arm-pod attracted my attention as perhaps a pointer to a 'universal' isolated arm-pod?

It is not realistic IMO, to expect the individual turntable manufacturers to design and sell 'universal' arm-pods? Depending on the design of the various turntables available, such a design could be more complex and expensive than a pod designed for a known individual turntable design.
That's why this exchange of differing solutions is valuable.
I designed my arm-pods to accept every arm I was aware of yet the pods were designed height-wise, to be specific to the Victor nude DD/TT although height variations up to +/- 10mm is possible via the height of spikes selected and the thickness of the aluminium top-plate to the arm-pods themselves.
In this case the cost of each pod worked out to approx $500 and would now be $300 for each additional one (since I have the casting mould).
It is hard to imagine a 'universal', height-adjustable, any-arm-you-like commercial arm-pod being available for a retail price anywhere near that?

Hi Brad - yes the idlers need the plinth to damp the rumble and the inquiries were for armpods going around existing TT's with plinths. A few talked about slate plinths that could be cut smaller to allow for multiple arms. I was planning on doing a plinth for an L75 platter/motor/top plate only with armpods.

Don may see this but I will reach out to him to see if he can provide more info.

Cheers Chris

Dear Nicola and Chris,
I have found that a tin of asparagus can form the ideal height for the temporary mounting of an arm :^)