Turntable sibilance

Sorry the response re tonearm wiring should have been in response to Parrotbee, not Pops.

You may be onto something there. The arm was rewired with Cardas wire, but unlike every other source in my system, which are dead quiet, there is low level 50 cycles hum (our 50 cycles in Australia is your 60 cycles) with the table. Grounding the earth wire has zero effect. Now I find out that Rega have a system where everything is grounded via the right channel wire.
Seems counterintuitive that an earthing inadequacy would produce sibilance but you're probably right. I might be able to solve two issues with one fix, although not sure how yet.

Thanks for all your responses. Bill_k, yes I see you're correct about the VTA on the Nottingham. I'll give that a go.

As a separate issue, I purchased an Expressimo Audio Half Moon Heavyweight counterweight. While it made no difference to the pre existing sibilance issue, in every other respect it was a massive improvement. Quite startling actually. Other than upgrading speakers, I've never heard anything make the degree of improvement that this deceptively simple thing has. For once the claims on the website are fully borne out. More focussed midrange, increased soundstage depth, sweeter highs etc.

For the person who asked me to list my system, ok, other than the aforementioned, I have a Lehmann Black Cube phono pre with external psu, Rotel 971 cd player, Korg MR 1000 DSD recorder/player, Brook (Australian) passive preamp, Musical Fidelity X-10 v3 tube buffer, Crown Studio Reference 1 power amp, & Earthworks Sigma 6.2 speakers.

Re the Reference 1, that's definitely not the problem. I've only had it for two weeks, the problem was the same with the Dynavector SSP/101 I was using before that.

Cartridge break in isn't it, the cartridge was actually bought used from someone on Audiogon. I had the stylus checked recently at a good hi fi store & they concluded it looked pretty good. I suspect VTA. As one of the other posters mentioned, because I have a Nottingham turntable the VTA is adjustable, so I'll try that.

Hey Viridian, I'm in Australia, no nickels. But I'll try the blutack, or find a five gram coin or washer.