Question about Nakamichi SoundSpace 5 Shelf System

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Wire antena (that came with SS5 system) causes a hum

The wire antena which came with the system (and instructions were to extend the wire for its entire length) causes a hum. If I turn the interphase that connects to the system, or move the wire itself, it increases or decreases the hum, but will not kill it. Has anyone else experienced that? I'd appreciate any tips; thanks very much.

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It is assumed that the hum is coming down the aerial wire it self....The hum should be eliminated
dissappear if you remove the wire from its connector at the rear of the receiver.

If this is the case then reconnect the aerial and try to find a radio station to listen to..

When you find a station you will find the hum dissappears as follows:

When there is no station detected the receiver tweaks up its sensitivity via the Automatic Gain Control, (AGC) and when this happens any thing that is detected on the aerial is reproduced at the speakers and in your case its just a hum.

I have heard this event lots of times and mostly its scrackles or scratchs or other weird sounds which come down the aerial while the AGC is flat out at maximum..

The radio station transmits a sound "carrier" and within this carrier there is the music content.

The receiver detects the "carrier" when you tune to the radio station, and then it sets its receive
level to the setting made by the volume control and then lovely music is presented at the speakers..

So in fact your receiver is working as it should be ,.,,, no worries mate....

Now if the hum is still there when the music is there then you have a fault, but as you havent mentiond this aspect your receiver is in my view quite "normal".

Cheers For Now

Posted on Sep 27, 2008

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