My PRC3 arm is set with downforce at zero (ie, with the vacuum turned off, the arm floats level).
There's no need for any downforce. The vacuum alone is sufficient to keep the nozzle riding lightly on the record and sucking cleanly.
Additional downforce can cause thread "unwinding". Too much can even cause marking of the vinyl surface (visible in the flats between the runout grooves on a shiny record).
There's no need for any downforce. The vacuum alone is sufficient to keep the nozzle riding lightly on the record and sucking cleanly.
Additional downforce can cause thread "unwinding". Too much can even cause marking of the vinyl surface (visible in the flats between the runout grooves on a shiny record).