Pace Freeview box to Nait5

Thanks martin. I think I tried the phono outputs on the TV (although I'll have a look tonight).

However if it is an earthing problem what can bedone about it - sounds expensive to me....:-(

"I don't list too intently to the radio the quality is a secondary issue to me"

Interestingly, through 52/500/SBLs, my missus couldnt hear the difference between the Panasonic Skybox on BBC R2 and the NAT02 (I could). Although I was not wholly convinced by the NAT02 to NAT01 improvement, the missus now says the 01 is better than the Skybox

Should be even better when it gets back from Salisbury too

...a Ground Loop Isolator. Radio Shack has them in the states and there is a post on this forum somewhere about UK sources for these.

You may have to try it in several locations in your setup to see where it works best. I have mine between the tele and the Nait 5, but I can still generate a hum if I switch cables among the CD (direct to Nait) and DVD (via tele) players. Very odd.

- GregB

Insert Witty Signature Line Here

I've connected my Nokia Freeview box to the 82 via 6 metres of phono-to-din Chorc Chrysalis, and it works superbly. My other half prefers the digibox to the NAT02 because there aren't any squelchy noises - even using a decent FM aerial (not a Ron Smith), we still get them. Sounds pretty good on Jazz FM and BBC6 - maybe DAB won't be so bad...

Greg,

Thanks for the tip. I got too impatient and ordered a Ground Loop Isolator from Maplin (the UK Radio Shack), it only cost a Ayrton. Take a look here if you're interested:

http://www.maplin.co.uk/products/module.asp?CartID=030808161355819&moduleno=33172&Products=1

I'll report back on its worth.

Cheers all.

Virek

Hi,
I have this problem between my 102 and a Yamaha processor... very low but audiable hum when I plug the mayware adaptor into any of the five dins on the 102. I have tried all sorts, including an isolation unit (see link below). The isolation unit made the hum worse! I have now resorted to unplugging the mayware when not listening to AV until I can sort out the problem.
I know its an earth problem, but for how often I listen to the AV side of my system I'm not that worried...
I also feel that a dedicated mains spur (much touted elsewhere on this forum)may well solve my issues..
http://www.nifty-gadgets.net/details.asp?catId=7&pId=142

Andy -

Yep, yep - AV and hifi often create grounding problems, especially if cable or satillite are involved.

- GregB

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Hu Greg,
do you have any experience of this?
My fav dealer Pete (Cymbiosis, Leicester)suggested going through the mill of unplugging everything etc. I've tried earthing the Yam but that does not work either...
grateful for any suggestions...

Well, Maplin online ordering is the nuts!!! Got the filter this morning, they took my order and posted sameday - fantastic.

Anyways, the filter.

Not bad, it has certainly reduced the hum significantly although at hasn't completely gone. The other side effect of course is that the input level is a little lower - to be overcome when I finally get around to equalising the input levels of all the inputs that I read in that thing, the, ins...guid...oh yeah manual.

All in all for an Aryton worthwhile.

Virek

My digibox is connected to the TV via a scart socket and the TV in turn is connected to the 52.

No problems with hum.

Hi Virek,

I had a similar problem with my NAD C660 CD-Recorder/player connected to a Nait5. After consulting with a friend(electrical engineer) we found out that NAD's chasis and signal earths were seperate. I changed the original cable of the player connecting the electrical earth to a screw on the chasis. The problem was gone.

Yaman

The problem here is that Naim equipment is only earthed at one point. that used to always be the turntable, but is now generally the CD. So althought the cases of the tuner for instance would be earthed, the negative of the signal cable at the tuner isn't locked to earth inside the tuner. If you start haveing 2 earths you can bugger up the sound, even if you don't create a hum problem.

Now when you connect a TV to the preamp that may on may not be earthed, looking at the back of my TV both it and the Video only have 2-core mains cables. However the aerial may be earthed, or maybe the cable coming into the cable TV box. The only thing to do is either disconnect the TV-preamp cable when you're not using it or try the isolator. The residual hum may be a long cable running close to a mains cable?

Phil

This reply has absolutely nothing at all to do with hum, but a lot of relevance to the Pace Freeview box.
Be aware that it does have a digital output on the back of it.
At present, I'm using mine connected digitally via my AV amp, and even via that route, it sounds massively better than using the analogue outs.
If you really wanted to improve things, consider something like an old Meridian 203 dac, which can be bought for about £150 s/h. That would see another substantial improvement in sound quality.

and if you connected it using an optical cable there'd be no chance at all of getting an earth loop, (as long as the DAC wasn't earthed that is.)

Phil

If you get the hum when *only* the Freeview box is hooked up, and, I assume, that the Freeview box does not have a ground screw on the back, then the isolator (or internal mods of which I know nothing) are probably all you can do.

In this scenario, I would *guess* that both the Nait and the Freeview are grounding the signal and the hum is due to the difference in potential between the two earth points - hence the isolator.

Let us know how it goes -

- GregB

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Virek,

Do you connect your box to your own aerial? Or to a communial system. If the latter this can cause funny earthing problems.

Cheers,

Andy