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In Reply to: RE: Damping the Foating CDP Laser-Track Tray posted by fastcat on February 21, 2015 at 10:48:12
Dan,
I just let a pipe cleaner absorb some MG Chemicals 801B Super Contact Cleaner and applied its soft narrow bent head to all visible contact points and running connection lines of parts on the floating tray including around the vicinity of the laser. The dynamics and flow of the music now dance effortlessly as Uncle Stu describes so ferro fluid may well be the best long-term solution but it is not a short-term requirement for those wanting to use a contact cleaner instead.
DG
Follow Ups:
AN oblique shot of the laser head. A gentle push to the laser head will reveal that the copper colored windings will move up and down, back and forth. The white rectangle to the right of the picture, right of the lens is the hinge assembly.
The copper winding boxes a pole piece for a magnet, and there is an additional pole piece outboard both coil windings. It is on these coils that I add the ferro fluid. Care must be exercised as the pole pieces will attract the ferro fluid !
Idea is that the ferro fluid fills in the gaps between the coil wires and thus increases the magnetic intensity of the motor, strengthening the field and making it react faster to the servo correction circuit.
In experimenting with this, it brought to light the importance of the correction circuit for audio in all optical drive systems. It also showed how poorly designed most correction circuits are. There hasn't been a laser mechanism which did not show dramatic improvement by adding ferro fluid to the motor coils.
Caveats: ferro fluid is a colloidal suspension of ferrite in mineral oil. Spill into the laser well and kiss the laser goodbye: you can cnot clean it out. The mineral oil will eventually dry out. That being said the ferrite material will already be lodged between the coil wires, exactly where you want it anyway
Uncle Stu,
Have you heard the result of adding contact enhancer to where wires are soldered to the circuit board/ volume pot/ speaker output terminals/ case in an amplifier? Be interested to read your comments if you try it.
DryGinger
Uncle Stu,
You're 100% right! Lacked the understanding and nerve to mess intimately with the laser in order to access its coils as you here articulately describe so was surprised with the beneficial outcome of contact-enhancing every visible tray connector/connection.
Thank you for sharing outstanding tweaks that invariably inspire multiple ideas for testing in my brain. The outcome of one was unexpectedly and remarkably productive. Since it can be applied at virtually no cost to considerable sonic benefit by any audiophile, I'll start a new thread later to give it a higher profile.
DG
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