Grounding turntable to stop static pop.


After retirement, am again running vintage equipment just removed from extended time in storage:  two ARC d115s, ARC sp10 and VPI Scout - cartridge is new Soundsign. After considerable break in all seemed well.
But now the problem is a static pop originating at the table that seems to throw off the amps - loud pops, plus the amp supplying the bass has a significant hum.  The ground post on the pre is loose and may not be functioning correctly.  Reason for the static pops?  Can I ground the table without using the pre?
PLUS am now in lower Delaware, just minutes north of Ocean City. Had a good tech in DC, but he's two hours away. Anyone know of a good tech here in lower slower Delaware?
TIA for comments, suggestions or recommendations!
DaveM
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Showing 1 response by millercarbon

Pull the cover, check the grounding post. You will find the nut holding the grounding post, tighten it. This is housekeeping, will not affect grounding, not unless it was wired to ground to the chassis at that point. While you could ground the arm anywhere uou do want the table grounded directly to the phono stage as this is less likely to create a ground differential and the hum that comes with it.

Static pops are probably just that, static. If so then get a Zero-Stat, and some Static Guard anti-static spray. Sold in Walmart and other stores as laundry spray it is a real cheap effective solution. I use it all the time.

"plus the amp supplying the bass has a significant hum."

This one is probably ground loop hum. All your amps, phono stage, everything must be plugged into the same circuit. Preferably the same outlet. Use a power strip or conditioner. If the sub amp is plugged into one outlet, and connected via RCA or whatever to another component on another outlet, that is a total recipe for ground loop hum.

But if the "hum" is a vibration coming from the transformer in the amp itself that is DC offset hum and a different thing altogether. So it helps to know exactly what we are talking about.

You don’t need a tech. A little audio knowledge goes a long way.