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TWL Weight Mod question

I have put a couple of lead fishing weights on a Rega arm with an Ortofon VMS 20E Mk11 cartridge,it sounds great except that it has a low cartridge resonance-around 7 Hz,should I persist or desist with this?
stefanl
dougdeacon
3,338 posts
 
A RF of 7 Hz will only be a problem if there's some energy source near that frequency to provoke arm/cartridge misbehavior. I don't believe 7 Hz warps or footfalls are particularly common.

If you want to raise the RF slightly you could try some lower mass weights. Otherwise, if it sounds better with the weights than without, I'd say enjoy.
twl
3,251 posts
 
This HiFi mod is not designed for use with high compliance cartridges, as it is not needed with them, and can cause mass/resonance mismatches.
stefanl OP
296 posts
 
The cartridge for some reason seems to match the Rega arm.I did a search on the Ortofon VMS 20 E Mk11 and a lot of people remember it fondly,I think one of our members Quadophile uses one.It is believed to be better than the current MM's Ortofon produces.Anyway it is actually a moving-iron type with the pole piece that comes directly back from the cantilever creating a voltage output by altering a stationary magnetic field i.e Variable Magnetic Shunt(VMS).Thus I believe it is less susceptible to spurious resonance than more traditional designs which rely directly on moving mass to create a voltage output.
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