last_lemming

Responses from last_lemming

Woofer pumping possibly due to tube amp when playing vinyl
I can also tell you the clamp isn’t the solution. I’ve got the VPI clamp that is dished on the underside and comes with a washer, but unless your clamp goes all the way to the edge of the lead in grooves, It ain’t gonna flatten those slight rises ... 
Woofer pumping possibly due to tube amp when playing vinyl
Thanks for your input guys. I just tried the mono switch on the preamp and it did somewhat reduce the pumping. About 30% less excursion as a best guess. I did relocate to a concrete floor to a completely different part of the room no avail.   
Woofer pumping possibly due to tube amp when playing vinyl
All my carts I have tried fall within the correct EM range. Some of the carts are suggested by VPI themselves.  
Woofer pumping possibly due to tube amp when playing vinyl
Thanks for the responsesto answer some questions:no sub is in usemy preamp does have mono but didn’t affect the pumpingI will try different speakers to see how that goes.  
Woofer pumping possibly due to tube amp when playing vinyl
Larryrs,I have considered this but the nearest appliance is a gas range opposite Side of the wall. If there is a phone app I’ll certainly give it a try. Got nothing to lose. One thing I don’t understand is the speakers go down to 32hz, but sub-Son... 
Woofer pumping possibly due to tube amp when playing vinyl
Dekay- I did hook up another amp, my CJ MF2100, still the woofers pumped.  
Woofer pumping possibly due to tube amp when playing vinyl
Thanks for all the input, here are some of the responses to some of the questions:The platter is dead level I’ve checked it out digitally and with a old fashion bubble level I’m pretty sure it’s not the phono preamp, I tried a Dynavector mkiii pho... 
Woofer pumping possibly due to tube amp when playing vinyl
I thought the same about antiskate.  I tried hi, low and off, nothing changed it. But I am using the same alignment and it is unique to the AS Smartactor.  It’s for better inner groove resolution. I will try a more standard alignment and see what ... 
Woofer pumping possibly due to tube amp when playing vinyl
Audiotombit has happened on all carts on both TT’s. Grado Sonata 3 (new)Nagaoka MP200 (<200 hrs)Nagaoka MP500 (<300 hrs)Soundsmith Carmen II (<300 hrs)they have all been aligned Using the AS Smartactor which takes error out unless you can... 
Woofer pumping possibly due to tube amp when playing vinyl
Tom, Thanks for your input, while the pioneer is a traditional gimbal arm the VPI is pivot.  As you probably know there are no bearings per se, to be sure I checked the pivot point and the cup, both are free of debris or burring.  I also have the ... 
Woofer pumping possibly due to tube amp when playing vinyl
Well other than a clamp that works wonders, I’m not sure what is left for me to try. Here is a list of things most things I’ve done:different cartsHead shell weightsAdjusted tracking forcedifferent count wtsdifferent antiskatechecked leadsdifferen... 
Woofer pumping possibly due to tube amp when playing vinyl
Well it’s not the music making the woofers pump since the pumping happens in the quiet passages as well.  
Woofer pumping possibly due to tube amp when playing vinyl
The issue with ditching the mat is static electric.  
Woofer pumping possibly due to tube amp when playing vinyl
I meant ALL my TT’s do it with ALL carts - exactly the same. What are the chances of duplicating the issue between to different TT’s and different carts. Also the carts compliance works with the arms, so there is no mismatch to be concerned here.W... 
Woofer pumping possibly due to tube amp when playing vinyl
I moved both TT’s - all over the place.  Not change at all and that’s spiked through to the concrete floor. Miller,I can’t discount your thoughts about the clamp, but how would this affect the outer edge of the record where there is no clamp. I us...