Jolida JD-9 Upgrade

Can’t comment on wear and tear.  I updated my JD-9 with new V-Caps ODAM, Tele tubes, Burr Brown OPAMPS, damping foam pads and transformer shield.  Made a considerable improvement after cap break in.  Sad part is that I stream 95% of my listening. 
 

If it works leave it alone! Buy a Schiit Mani 2 for $160 - a better phono stage!

Look up the Audiokarma "Official JD9 thread". It is a huge source of info for upgrade mods for the JD9. My JD9 II has upgraded caps, Burr Brown opamps, fuse, damping material and NOS RCA black plate tubes.

One of the good things about the JD9 is the excellent capacitance settings available for moving magnet carts. You can actually select a setting of zero if appropriate your cart. An example is a cart that has a capacitance spec of 100 picofarads. Well the phono cables will usually use up most or all of the "100" picofarads so, adding more with the preamp may not be desirable. A setting of zero could be the best choice in that case.

Thanks for the info.  I visited the Audiokarma page and found plenty of info on upgrading the unit, but unable to find anything on doing it a second time due to age.  I'm reluctant to contact PCX since they are in the business of selling parts and may be biased.

If one wants to go down the DIY Route, then taking time to learn the methods for testing the Components for their values will be the way to go.

Heat, Humidity and the Breakdown or aging of materials used for the the assembly are all factors usually considered. Even a Solder Joint has a limited life?    

Have a look at Tutorials covering Basic Component Fault Finding. 

As a strong suggestion and an option that was not available at the time of original ownership, as an addition to any work being undertaken.

Replacing the RCA's on Both Chassis (Phon' and Pre'), as well as the Cable Terminations, to a Low Eddy Design, is an expense will worthwhile of incurring. If done as a DIY activity the cost is not too much.

Additionally using a PC Triple C wire for the Signal Path within the Phon' can also add real time benefits to the sonic. Add the PC Triple C Wire to the Interconnects using the Low Eddy RCA's and the sonic might just jump to a night / day betterment.

Phon's I have been very used to experiencing and very impressed with, have been taken to another level with the above suggestion adopted for the Signal Path.

My wish today is to hear PC Triple C used for a Cart's Coil and a SUT, I have heard it in use for every other role where Wire is to be used, and its presence is always perceived as a betterment