Cusat50 for me?

I'm pleased to hear that the Cusat50 is doing it's job seeing as it's me that makes them .

Still using my 1.5m Cusat in my TT setup and still very pleased. Thanks John

Hello John C

I have just received the cusat50 1.5m (1+1) you made last week.
Please could you tell us how long the burn-in period should be?



Edited by j633295 - 07 Jul 2010 at 9:38pm

I think I must supplement John's reply regarding the insulation and the contact or grip with the conductors because without qualification John's explanation may sound a bit "Beltist"

It is a well known fact that insulators have an effect on conductivity of the conductors they surround. If anybody doubts what I am saying they should take a look at the overhead electricity supply cables and notice they do not have insulation. On a micro level they should research the inductance of perfectly straight short lengths of pcb track. An insulator attached to a conductor has the effect of "slowing down" the signal being carried and when this happens the behaviour is the same as that of an inductor. The size of inductor which would apply to overhead electricity supply cables if they were insulated would be so large as to consume a good proportion of the electricity being carried - this is why the cables are carried overhead in free air. It is not a case of insulation not being required because they're overhead. The short length of pcb track has a very small inductance by comparison and therefore only affects radio frequencies but that's still important in audio to prevent instability.

Another component that has the property of going inductive is all capacitors. They too are conductors held apart by insulation. They too exhibit inductance at high frequency and you can see that from manufacturers data sheets (inductance curves).

Due to simple normal use of interconnects a thing called age hardening occurs where the insulation contacting the conductors hardens and will eventually lose its grip on the conductors. How long? A lot depends on other assisting mechanisms such as expansion and contraction due to temperature changes (I do not recommend deep freezing).

Another assisting mechanism is manipulation which one member once termed "cable whirling". A slight occasional twisting grasping either end of the cable (not the connectors) should do the same.


Edited by Graham Slee - 12 Jul 2010 at 8:05pm