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Is there such a thing as a "dirty signal"?...

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plastic penguin
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...in particular with my tuner. Since yesterday [ususally] the strongest stations are now exhibiting lots of sibilance and background 'CLICKING', although the signal meter is very high.

I've checked Freeview, CDP, TT and they are fine. No sibilance or distortion.

Suggestions welcome. 

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chebby
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RE: Is there such a thing as a "dirty signal"?...

Have you checked your roof aerial and co-ax connections?

Have you checked if your local FM transmitter is having engineering work done?

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plastic penguin
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RE: Is there such a thing as a "dirty signal"?...

chebby wrote:

Have you checked your roof aerial and co-ax connections?

Have you checked if your local FM transmitter is having engineering work done?

Yes to the first and no to the second. How does one check the transmitter? All our signals, whether TV or radio comes from Crystal Palace.

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RE: Is there such a thing as a "dirty signal"?...
plastic penguin
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RE: Is there such a thing as a "dirty signal"?...

Thanks Crocodile. Opened the link and entered the postcode...

"Effect: No problems."

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RE: Is there such a thing as a "dirty signal"?...

I guess the next step needs to be getting your hands on another tuner to establish whether it's the signal or the hardware.

chebby
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RE: Is there such a thing as a "dirty signal"?...

Crocodile wrote:
I guess the next step needs to be getting your hands on another tuner to establish whether it's the signal or the hardware.

That's easy (and cheap)...

clicky

clicky2

(sell it for the same, or keep as a spare, when done with it)

If it persists - and it's not the tuner - then you may need to get a bloke on the roof. 

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plastic penguin
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RE: Is there such a thing as a "dirty signal"?...

chebby wrote:

Crocodile wrote:
I guess the next step needs to be getting your hands on another tuner to establish whether it's the signal or the hardware.

That's easy (and cheap)...

clicky

clicky2

(sell it for the same, or keep as a spare, when done with it)

If it persists - and it's not the tuner - then you may need to get a bloke on the roof. 

Mmmm... are the Denons signal hungry? I know you need a decent signal for all tuners but the Marantz is so so easy. I've had set-up with a loft aerial or just a couple of bits of 2-core electrical flex, all with practically identical results.

I've tried a Quad and Pure Digital tuners and the signal was challenging to say the least.

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chebby
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RE: Is there such a thing as a "dirty signal"?...

plastic penguin wrote:
Mmmm... are the Denons signal hungry? I know you need a decent signal for all tuners but the Marantz is so so easy. I've had set-up with a loft aerial or just a couple of bits of 2-core electrical flex, all with practically identical results.

I've had dedicated FM roof aerials (3 of 'em) since we bought the house 27 years ago.  The house - well, the roof at least - is also 'line of sight' with our nearest transmitter in Rowridge. (Clear day, binoculars.)

You can just make it out about 40 percent along the horizon (from the left) in this photo.

So, anyway, with superb radio reception and a decent roof aerial, every FM tuner I have owned - in those 27 years - has never had any problems with any station. (Even the wonderful Naim NAT05 - that was supposed to be 'picky' - performed like a dream with a simple half wave dipole aerial.)

I can't comment on loft aerials or using twin flex. Never had to do that thankfully.

The building we lived in (before this house) had communal FM and TV aerials 'plumbed in' to all the flats and worked well on both.

However, the Denon TU-260L will be fine, i'm sure. (I actually used one - bought from ebay - as a 'place marker' for a few months whilst I saved up for the Naim tuner.) I don't recall reading anything about it being 'difficult'.

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plastic penguin
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RE: Is there such a thing as a "dirty signal"?...

chebby wrote:

plastic penguin wrote:
Mmmm... are the Denons signal hungry? I know you need a decent signal for all tuners but the Marantz is so so easy. I've had set-up with a loft aerial or just a couple of bits of 2-core electrical flex, all with practically identical results.

I've had dedicated FM roof aerials (3 of 'em) since we bought the house 27 years ago.  The house - well, the roof at least - is also 'line of sight' with our nearest transmitter in Rowridge. (Clear day, binoculars.)

You can just make it out about 40 percent along the horizon (from the left) in this photo.

So, anyway, with superb radio reception and a decent roof aerial, every FM tuner I have owned - in those 27 years - has never had any problems with any station. (Even the wonderful Naim NAT05 - that was supposed to be 'picky' - performed like a dream with a simple half wave dipole aerial.)

I can't comment on loft aerials or using twin flex. Never had to do that thankfully.

The building we lived in (before this house) had communal FM and TV aerials 'plumbed in' to all the flats and worked well on both.

However, the Denon TU-260L will be fine, i'm sure. (I actually used one - bought from ebay - as a 'place marker' for a few months whilst I saved up for the Naim tuner.) I don't recall reading anything about it being 'difficult'.

Cheers. The SQ is neither here nor there, but if I can't hear the music it'll be a waste of everyone's time.

I'll gamble on one and see if it stops the 'clicking' and sibilance. Oddly, since I switched it on tonight, the sibilance seems to have gone but the clicking has got worse.

The irony is there was my tuner on ebay a few weeks ago and tempted to buy it for spares etc. That's only the second one I've seen in the last 18 months.

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Richard Allen
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RE: Is there such a thing as a "dirty signal"?...

plastic penguin wrote:

...in particular with my tuner. Since yesterday [ususally] the strongest stations are now exhibiting lots of sibilance and background 'CLICKING', although the signal meter is very high.

I've checked Freeview, CDP, TT and they are fine. No sibilance or distortion.

Suggestions welcome. 

Have you by any chance got 1 of those mains thingys for sending internet round the house plugged in near your tuner. My friend had 1 of them causing havoc with his phono stage. they go noisy occasionally.

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Overdose
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RE: Is there such a thing as a "dirty signal"?...

True, ethernet over mains can apparently produce a lot of RF interferance. I don't know how the interferance would manifest itself though. I also don't know how far from the source, the inerferance could radiate, so it's entirely possible that you might be picking up interferance from someone elses home. In which case, I really don't know what you could do.

 

http://www.whathifi.com/forum/hi-fi/ethernet-over-mains

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plastic penguin
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RE: Is there such a thing as a "dirty signal"?...

Richard Allen wrote:

plastic penguin wrote:

...in particular with my tuner. Since yesterday [ususally] the strongest stations are now exhibiting lots of sibilance and background 'CLICKING', although the signal meter is very high.

I've checked Freeview, CDP, TT and they are fine. No sibilance or distortion.

Suggestions welcome. 

Have you by any chance got 1 of those mains thingys for sending internet round the house plugged in near your tuner. My friend had 1 of them causing havoc with his phono stage. they go noisy occasionally.

Thanks for suggestion, but no. The PC is in a different room.

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RE: Is there such a thing as a "dirty signal"?...

plastic penguin wrote:

Thanks for suggestion, but no. The PC is in a different room.

The issue is potentially ethernet over mains and if your neighbour has it, you could be suffering the effects of RF interference, even if you had no Pc in the house yourself.

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chebby
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RE: Is there such a thing as a "dirty signal"?...

Overdose wrote:

plastic penguin wrote:

Thanks for suggestion, but no. The PC is in a different room.

The issue is potentially ethernet over mains and if your neighbour has it, you could be suffering the effects of RF interference, even if you had no Pc in the house yourself.

Assuming PP is using proper double screened co-ax for the aerial lead (and the tuner innards are screened properly) I can't see where any interference from mains (in another house) would break in.

Our computers have only ever interfered with MW and SW when a portable is placed near them (within a metre or so), the same thing has never happened with FM (whether connected to the roof aerial or a portable with telescopic aerial).

 

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RE: Is there such a thing as a "dirty signal"?...
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