Many old turntables can be tastefully modded/upgraded to either surpass or equal current budget offerings. We've learned a lot since the 1970s about isolation, vibration dampening, the quality of cabling, mats, clamps, etc.
Should be easy to determine the effectiveness of mods also - the main efffect would be on dynamic range. This is the ratio of the amplitude of the loudest possible undistorted sine wave to the root mean square (rms) noise amplitude. Objective measurements would be nice here.
HELP!!!! I hooked up the Ariston RD40 to my 2ndary system yesterday and discovered there is an awful 60hz hum. It seems to be generated from the Cary Cad-50's (tube amps). When I cut the plate voltage, the hum goes away. I have tripled checked the grounding cable and tried grounding to the power conditioner instead of the DMC-6 preamp. This does not help. I'm thinking an isolated ground on a separate wall socket for the tube amps might do the trick. Any ideas Evoites? I really want to get the Ariston RD40 going with the tube amps, but that hum is beyond tolerable!
Ed, phono stage is built into the preamp, right? Are you mixing balanced and unbalanced connections between the preamp and power amps? Do other sources hum with the same pre/power amp combo or is it just the TT? Are you using Step-Up Transformers between cartridge and phono pre? Is the phono cable shielded or unshielded?
Read this article: http://www.rane.com/note110.html
(Thanks to Josh for the pin1problem.com resources)