Lew, not sure you saw that shortly before you posted the OP indicated that he tried connecting the RCA plugs to the BAT’s XLR input connectors via adapters, with the problem nevertheless presenting itself subsequently.
Joe, no problem re not having done the measurements I suggested. I made that suggestion mostly because I thought it might provide me with some insight into how the input circuit is implemented, which in turn might have triggered further ideas.
At this point, if you haven’t already done so I would suggest that while music is playing you very gently wiggle and tug on the cables, near the turntable end as well as at the phono stage end. If that doesn’t precipitate a dropout, and given that the problem has occurred with both the RCA and XLR inputs, I would have to think that the cables and connectors are exonerated, and the culprit is something in the circuitry of the phono stage. As to specifically what that may be, I’m at a loss at this point.
Per one of my earlier suggestions, though, it might prove useful to know what the resistive loading is set to, since as I had mentioned the act of disconnecting the turntable cables changes the impedance presented to the input stage from essentially the cartridge’s impedance to whatever value the loading is set to. I realize that in order to determine that you would have to open up the phono stage. But who knows, when you do that you might spot a burned resistor, a leaking capacitor, or some other visual evidence of something that might account for the problem!
Regards,
-- Al
Joe, no problem re not having done the measurements I suggested. I made that suggestion mostly because I thought it might provide me with some insight into how the input circuit is implemented, which in turn might have triggered further ideas.
At this point, if you haven’t already done so I would suggest that while music is playing you very gently wiggle and tug on the cables, near the turntable end as well as at the phono stage end. If that doesn’t precipitate a dropout, and given that the problem has occurred with both the RCA and XLR inputs, I would have to think that the cables and connectors are exonerated, and the culprit is something in the circuitry of the phono stage. As to specifically what that may be, I’m at a loss at this point.
Per one of my earlier suggestions, though, it might prove useful to know what the resistive loading is set to, since as I had mentioned the act of disconnecting the turntable cables changes the impedance presented to the input stage from essentially the cartridge’s impedance to whatever value the loading is set to. I realize that in order to determine that you would have to open up the phono stage. But who knows, when you do that you might spot a burned resistor, a leaking capacitor, or some other visual evidence of something that might account for the problem!
Regards,
-- Al