Krell SACD Standard: grinding CDs prob.solved


Hi
By pure accident i solved the problem of notoriously noisy transport on Krell SACD Standard.I needed to replace a fuse (switching from Hi-Fi Tuning back to stock)and misplaced the original Krell fuse which was labeled as slow blow 500 mA.Without having one on hand i installed 1 A slow blow fuse and that resolved the problem.The unit runs barely warm (compared to hot with 0.5A fuse inside) and all the noisy CDs are spinning dead quiet now.
I have 2 possible causes for this:
1.because the unit runs a lot cooler now,it prevents some part inside which previously caused the grinding noise ,
from getting expanded because of the heat.
2.because of urestricted current,the whole mechanism is not strainig and operates as it suppose to
Note:the fuse inside my brand new unit was 500 mA,installed at the factory.When i called the tech.dept. to inquire about the fuse,they said the fuse inside according to the technical papers should be 0,8 A.I don't know if it is a quality control issue or what,i am glad the unit is spinning disc and is silent.Too bad i strained thru the grinding noise for the past 3 years.
overhang

Showing 2 responses by xti16

Fuses are there for the protection of the electronics. The only way a fuse LIMITS current is to blow. I think something else resolved the noise/heat issue. For grins and giggles did you put back the 500ma fuse to see if the heat/noise issue comes back?
Overhang
Fuses ares pieces of wire designed to blow/burn when the current is overloaded for its rated specs. I have heard of fuseistors (resistive fuses) but never have seen them in use (I've been repairing computers for 34 years not audio equipment). If I ever had a fuse that would limit current except for beyond its specs I sure would not use it. If its limiting current I would have to say it is resistive (whats the point of that other than to put a load on the noise too but it all equals out in the end). It to me it would be like turning down the volume to reduce the static - hiss - hum etc. Yes you reduced the noise but you just reduced everything else.