I've tried every which way - all on, all off, some on, some off, in all cases I can't get rid of the darn hum.
Low level hum only with lp playback
Basic system:
VPI Prime turntable (cart is a Dynavector 20x2L) with
Purest Audio interconnects ( with integral ground wire connected to phono pre) to
Parasound JC3+ Phono Pre with
Cardas Clear Light Balanced Interconnects and separate ground wire connected to
BAT Preamp
REL R-r328 sub
I use an Eagle PSU with Roadrunner tach for speed control.
So I'm getting a low level hum ONLY when the record is playing. You can hear the hum on the lead in groove - the sound gets louder as the volume goes up even if the music hasn't started. However if the needle is lifted the hum goes away.
I played around with the ground wires locations to no avail.
I've checked the leads to the cart for tightness and to make sure they are connected completely -they are.
I've moved the speed control equipment to make sure they are no interfering.
All my connections are tight.
VPI Prime turntable (cart is a Dynavector 20x2L) with
Purest Audio interconnects ( with integral ground wire connected to phono pre) to
Parasound JC3+ Phono Pre with
Cardas Clear Light Balanced Interconnects and separate ground wire connected to
BAT Preamp
REL R-r328 sub
I use an Eagle PSU with Roadrunner tach for speed control.
So I'm getting a low level hum ONLY when the record is playing. You can hear the hum on the lead in groove - the sound gets louder as the volume goes up even if the music hasn't started. However if the needle is lifted the hum goes away.
I played around with the ground wires locations to no avail.
I've checked the leads to the cart for tightness and to make sure they are connected completely -they are.
I've moved the speed control equipment to make sure they are no interfering.
All my connections are tight.
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- 11 posts total
Ringing platter possibly? Quite a few yrs ago I purchased a mat from Audioquest made of sorbojel, worked great for just what you're describing, but was toxic to vinyl, ruined many of my records. Fast forward to just two weeks ago. Experiencing exactly what you're describing and finally tired of it I thought of a possible solution. Find one of these old Audioquest mats on eBay etc and sandwich it between my platter and mat thus protecting my vinyl. Couldn't find one of those mats anywhere so went back on eBay and found sorbothane ( gel ) being sold in flat squares. Purchased one 12" X 12" X 1/4', and using my mat as a template cut out a new mat. Should have purchased one a bit thinner as it left my spindle a bit shorter than I liked making placing the record weight a bit more difficult. The mat along with a few other changes have virtually eliminated any and all vibrational hum. |
Wow! You've had this problem for over 6 months now??? https://forum.audiogon.com/discussions/vpi-scount-to-prime-now-static Have you contacted VPI? |
- 11 posts total