Dave/Frogman -
Interesting your comments on going back to the aluminium arm with MM's.
With my aluminium arm I removed the heat shrink and internal foam. This yielded a lighter sound, but cleaner, clearer and less smear with both high and low compliance cartridges -Shure V15Vmr/Denon 103/Carnegie/Koetsu Black.
I also removed the soft teflon from the headshell and epoxied in a piece of carbon fiber. If you dont mind butchering your arm tube a little all you do is prise open the end, the teflon will pull straight out if you can get a good grip on it with some long nose pliers. Then just cut and insert the carbon fiber with epoxy and clamp the headshell up in a vice.
In my view with the low compliance cartridges tweaking the spring counterweight set up is plenty sufficient to get the optimum without having to add mass to the arm tube. I had no tracking problems with low compliance cartirdges in my lightened aluminium armtube. Follow the instructions on counterweight position, ie low mass further out and tuning.
When you go to 2 or 3 springs you are increasing the mechanical coupling of the mass of the counterweight and the cartridge sees more horizontal mass. I still prefer decoupling the spring by loosening the end cap and using teflon wedges to dampen the swinging counterweight motion even with low compliance cartridges.
Frogman you reported hearing more bass notes when you loosened the end cap off. Any update on this ?
Interesting your comments on going back to the aluminium arm with MM's.
With my aluminium arm I removed the heat shrink and internal foam. This yielded a lighter sound, but cleaner, clearer and less smear with both high and low compliance cartridges -Shure V15Vmr/Denon 103/Carnegie/Koetsu Black.
I also removed the soft teflon from the headshell and epoxied in a piece of carbon fiber. If you dont mind butchering your arm tube a little all you do is prise open the end, the teflon will pull straight out if you can get a good grip on it with some long nose pliers. Then just cut and insert the carbon fiber with epoxy and clamp the headshell up in a vice.
In my view with the low compliance cartridges tweaking the spring counterweight set up is plenty sufficient to get the optimum without having to add mass to the arm tube. I had no tracking problems with low compliance cartirdges in my lightened aluminium armtube. Follow the instructions on counterweight position, ie low mass further out and tuning.
When you go to 2 or 3 springs you are increasing the mechanical coupling of the mass of the counterweight and the cartridge sees more horizontal mass. I still prefer decoupling the spring by loosening the end cap and using teflon wedges to dampen the swinging counterweight motion even with low compliance cartridges.
Frogman you reported hearing more bass notes when you loosened the end cap off. Any update on this ?