New Power Cable on a 1990 Hafler DH120?


Is it worth putting an upgraded power cord on my 1990 Hafler DH120?  I am considering upgrading because it is rather old.  Still sounds good IMO.  Maybe I could get some better sound with a new cable.  Considering a GR Research cable.

Thoughts?

wlp3

Thanks to everyone for your input.  It spoke to John Hillig at Musical Concepts and he is really the Hafler upgrade guy.  Lots of experience.  I think I will have them upgraded by John for a second system.  Thanks to BPoletti for the contact.

                                            Happy listening!

Rodman - Your concern for the OP's gear is fine/ But please dont call my intentions into question. I was clear - I have the experience to tell him that the risks were small to nonexistent.  Why? its too long to get into but begin with the fuse and the effective series resistance of the transformer, combiend with the exponentially decreasing load of the charging capacitors.  with reasonable sizes, say 33k-50k uF, its simply not an issue. It simply can;t pass enough current to kill itself before the capacitor are charged. Even if it DID continue the fuse would blow.

 

Which brings me to the real reason for protection - which i suggested, although you conveniently ignored it.  Or maybe didn't understand it - i cant say.  The REAL reason, IMNSHO, is that once a bigger capacitor storage bank exists,a larger fuse is required, therefore less protection for myriad faults.

 

I believe the Hafler DH200 came with a 5A slow blow line fuse. My gonzo-filtered unit with a surge supression circuit, employed a 3A slow blow.  That means MORE protection.

 

I have built 100s of prototypes and experiments.  I have supervised the building of even more.  This is not idle speculation.

 

BTW through various ham fisted errors I have dead shorted the secondaries of transformers. I never saw one fail.  Eventually it will fail due to heat, but not nstantly, back to the fuse.

 

These are not mysterious error methods. The infinite current zero impedance transformer, sadly, does nto exist.  I'm still looking tho.

 

G

 

@itsjust me-

     I’m certain everyone is duly impressed, with your expertise.

     Just keep in mind: you don’t stand alone, with however many decades of experience you’ve under your belt.

     As I mentioned: aside from the very possible failure issues, which could easily be created by someone without the experience to prevent them, there are the EMI/noise effects that can be created.

     I’ve had to undo some bonafide abortions, in the past 40 years, created by those that didn’t know what they were doing.

     The OP’s only interest was that of a power cord replacement.

     And, directly to the point of my previous post: You failed mention anything about, "reasonable sizes", when you said, "THE BIGGEST CAPACITANCE POSSIBLE".

     There’s enough room in the typical Hafler chassis, to install much more capacitance than advisable.

                                                  Happy listening!

 " ...with reasonable sizes, say 33k-50k uF, its simply not an issue."