Thorens TD 160 "pop" revisited

I realize that I may be late to this party, however I'm seeking some clarification and am hoping to get the final answer to this issue. 

Just finished setting up new (to me) system with a beautiful TD 160, Rega 300 tonearm and Pete Riggles VTAF modification, along with his counterweight system. Connected to a restored Accuphase E-202, sending to a pair of Klipsch Forte IV. 

To my ears, the sound is heavenly. 

But: when I switch on the tt, there is a LOUD POP. I've seen discussions regarding snubbers and various capacitors placed within the tt, and yet others have said that failed to solve issue. Another post said he finally find the solution was adding a resistor somewhere unspecified. 

Has anyone come up with a final reason why this happens and a proven solution?