What is a slugged lead? I am having a noise issue with my unity gain. Somebody suggested a "slugged lead" but I've got no clue what that is....

Is it a lead with a ferrite ring at one end?

quote:

Originally posted by BigH47:
Is it a lead with a ferrite ring at one end?

No.

http://forums.naim-audio.com/eve/forums/a/tpc/f/4801938...522951707#2522951707

It is a (long) signal lead which incorporates a resistor in the signal path (at the send end) to ensure stability.

ThanX Adam.... Dealer was pretty confused regarding what this slug was :P hehehe
For the meantime, the noise I was getting gave me an excuse to return my 2 weeks old nait 5i (not 5 i) and order a 122x/150x. Considering that the price of the nait will be considered as a downpayment, The jump will not be a financial "event". Will use the RCA input without unity gain for a while and later on see how it goes with a DIN-RCA cable. Just hope you guys don't come up with a 122 x and 150 x by the time my new stuff is on the way.

I had the same interference type noise caused by using a 5 meter lead between my AV2 and 552 when using Unity Gain. This was completly rectified by slugging the lead. This consisted of inserting a 22ohm 0.6w resistor in the Left and Right signal out legs within the AV2 Din plug. This if fairly simple to do if you have reasonable soldering skills and a steady hand but if in doubt get your dealer to do it.

Trevor

ThanX Trevor;
But what I don't understand is why am I egtting it with the Nait and not the 112? In both situations I am using 1m run of cobra3 cables. Only difference between the two is that on the nait it is an RCA cable while on the 112 it is a DIN-RCA

So call it a resistor lead then.
Slugs (electrically speaking) are metal or ferrite rings or sleeves found in relays and such like back in the day, used to slow down (make sluggish) their operation.

Flame:
From what I remember when I had the problem some Naim units had these resistors built into their outputs and some did not. But it was only meant to be a problem if using long connecting lead.
The tecky people at Naim should know the full story.
What is the betting the 112 has the resistors inbuilt and the Nait does not!!!!!

BigH47:
I work as Railway Signalling engineer and Slugged Relays using metal sleeves are still very much in use for either slow to pick or slow to drop operations. Alot simpler and more reliable than using electronics.

Trevor

The issue usually relates to a combination of:-

-the unity gain input being unbuffered (when set to this mode)

-lead length/type/brand/capacitance/inductance etc

-setup of system. This varies alot system to system - house to house (relating to earth loops and local sources causing interference)