Radio interference; is this a servicing issue

Posted by: Rockingdoc on 07 February 2004

I've noticed gradually worsening radio interference from my system over the past year. The system is always powered up, and quite often I am treated to perfectly clear radio programme reception, even though I don't have a tuner connected.
The problem is often on one channel only, and I suspect an ageing 250 on that side, but it could be the SNAXO/HiCap.
System; CDS2/CDPS, NAC52/SCap, SNAXO/HiCap, 250/250.
Can degrading caps. cause this?
If so, please hurry up and find a new supplier Naim.

Posted on: 07 February 2004 by Steve Hall

Active Naim systems do tend to pick up radio. Mine certainly does, but only on hot summer days is it annoying.

However, if you try moving the 3 cabled that come in/out of the SNAXO you will find you can majorly reduce it.

If not, you may have an earthing problem somewhere in that area, as I know one of the sockets on my 180's is a little microphonic.

Posted on: 07 February 2004 by Paul B

I don't believe so. Naim active systems are, I believe, very sensitive to RFI just as the amp transformers are sensitive to AC wave distortion and buzz/hum loudly. My active system - similar to yours - also picks up RFI on occasion. It breaks through my system even with the mute on! In my case I suspect a neighbour's mobile/portable phone as the RFI does not appear to be from a radio broadcast. Curiously enough, the most recent bout was yesterday and on one channel also. I also believe it may be related to the connections/or position of the interconnects connecting the SNAXO.

Paul