GoodSoundClub - Romy the Cat's Audio Site

In the Forum: Analog Playback
In the Thread: Fidelity Research FR-7

Post Subject: Decca be itPosted by N-set on: 8/12/2012

After dealing with a few individuals trying to sell me a FR-7, I've decided to kiss goodbye to this idea
and look into the direction which has actually been considered at this site: Decca Jubilee.
From several sources the the signals are that this might be what I'm after. Unlike the half-brain
US distributor quoted somewhere at the site, the UK London Decca manufacturing people are very cooperative and will
send me their demo Jubilee for an in-system trial. Nice!

The big challenge seems to incorporate it into 3012R and EMT930.... It puts a lot of energy due to almost non existent
cantilever damping and the knife bearing can rattle. The "Decca arm wisdom" seems to be damped heavy unipivots,
with precise bearings, but lets challenge it. Also EMT930 beats at approx. 3Hz -- the idler fundamental, which may additionaly excite
arm-cart lateral resonance.
Luckily I have the steel R version, which is internally
better damped as I learned than the alu one + nylon bearings. Putting an extra headshell weight
to the max of the arm (or machining an extra counterweight to reach circa 30g eff.) + possibly SME FD200
viscosious lateral (where the most needed) damping kit and lets see...

Cheers
N-set

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