Audio Asylum Thread Printer
Get a view of an entire thread on one page
|For Sale Ads|
In Reply to: RE: Now that I've read your post, I realize where I made a mistake... posted by Ugly on May 30, 2017 at 20:19:13
You don't need to rewire anything on the Technics SL1200. All you have to do is construct a different cable to go from the arm to the preamp.
The specs for doing this is in the owner's manual for our preamps which is a free download- but the important thing is that you don't allow the barrel connection of the RCA to come in contact with the shield of the cable, which ties to the ground post on the 'table, and to pin 1 of the XLR input on the preamp side (which is also ground).
I probably mis-spoke. What you recommended is in fact all I've been doing, ie swapping out the interface cable that solders to the little circuit board inside the TT. I had previously had some shielded twisted pair installed for the experiment then put some coax on there.
Just a little whining. No show stoppers.
I swap between twisted pair and coax depending which preamp I'm playing with at the moment. I didn't mention earlier I also have a full balanced preamp I'm playing with. The problem with this particular balanced phono stage is the noise. It's self noise, at equivalent gain, is around 5-10dB higher than where the hum of the 651p's are sitting which is also 5-10dB above their self noise. In other words the balanced performance of the balanced preamp is offset by it's crummy electronics design. Though it has no apparent hum visible in the FFT scans I've captured from it, it's wideband noise is pretty massive.
Yes, the noise is present with cart connected. I also terminate unused inputs with shorts.
I like to do my noise testing and troubleshooting with the equipment hooked up as I plan to use them.
The coils in my moving magnet cartridge seem to pick up a bit more noise than when I just use shorting plugs but not too bad really.
Post a Message!
This post is made possible by the generous support of people like you and our sponsors: