[UK-CONTEST] Plasma TV(i)

[Callum M0MCX]

Colin, I disconnected everything - and even with just the mains connected,
this issue occurs.

I will go and see the TV department at John Lewis in Solihull tomorrow since
I have a 5 year warranty. 

You can bet they won't have a clue what I'm on about.. 

Wish me luck!


Callum McCormick
http://www.m0mcx.co.uk/
If you think education is expensive, try ignorance. 

-----Original Message-----
From: uk-contest-bounces at contesting.com
[mailto:uk-contest-bounces at contesting.com] On Behalf Of Colin
Sent: 29 September 2008 10:22
To: UK-Contest
Subject: Re: [UK-CONTEST] Plasma TV(i)

Guys,

Have you tried disconnecting the TV aerial to see what happens?   Plasma 
TVs have a reputation for re-radiating back up the feeder.

73

Colin, G3PSM

Mark Marsden wrote:
> Hi Callum, Ian & Pete
>
> There was a thread on UK-Contest on this very subject a few months ago.
The consensus was that LCD TVs are better wrt RFI. I have a 32" Sony Bravia
that creates no perceptable noise with an BigIR & elevated radials within
10m of the screen. No TVI either with 400W, though I think that must be
helped enormously by our TV feed being buried fibre optics.
>
> 73 Mark G4AXX   
>
> -----Original Message-----
> From: uk-contest-bounces at contesting.com
[mailto:uk-contest-bounces at contesting.com] On Behalf Of Pete Lindsay
> Sent: 29 September 2008 10:01
> To: UK Contest Reflector
> Subject: Re: [UK-CONTEST] Plasma TV(i)
>
> I have a Panasonic plasma TV and the same problems. It has to be switched
off to enable me to hear anything on the LF bands. Good job I have an
understanding XYL !
> Mine is about 4-5 years old so I'm thinking of replacing it.
> Is there anyone out there who know about or has a large plasma or LCD TV
that they know is RFI free??
>
> Pete, G4CLA.
>
> 2008/9/28 Callum M0MCX <callum at mccormick.uk.com>:
>   
>> Hello Ian,
>>
>> Unfortunately it's not that new (!)a year old or more I seem to 
>> remember, however it's only recently that I actually identified it was 
>> causing me all these issues and genuinely thought it was a common mode 
>> mains issue, hence the large quantity of ferrites I bought to cure it.
>>
>> Thing is, for the last 12 months, I've been commissioning / building a 
>> new boat and have had little time to play RF. However with the boat 
>> now settled in, and with the winter coming in - I thought I'd buckle 
>> down and go and play with some contests. I have since realised the 
>> extent of this interference is completely blocking my ability to use 
>> radio from home though and need to sort it out.
>>
>> I bought it from John Lewis with a 5 year warranty - I may be able to 
>> do something with them (can I get Ofcom involved..?)  I wonder if 
>> anyone at RSGB can assist though. I do hope so. If not, I'll need to 
>> weigh up the £1,200 I paid for it -vs- my hobby.
>>
>> If you know me, you'll know that I won't go down without a good 
>> quality fight though!
>>
>> I'll keep you all posted.
>>
>> Regards,
>>
>> Callum McCormick
>> http://www.m0mcx.co.uk/
>> If you think education is expensive, try ignorance.
>>
>> -----Original Message-----
>> From: Ian Fugler G4IIY [mailto:zen90387 at zen.co.uk]
>> Sent: 28 September 2008 18:59
>> To: Callum M0MCX; uk-contest at contesting.com
>> Subject: [UK-CONTEST] Plasma TV(i)
>>
>> Callum
>>
>> It is clearly a new TV.  Is it too late to return the TV to the 
>> supplier/shop?  You have a cooling-off period during which you can 
>> return goods.  I think I might be tempted to do so and then do some 
>> research on this reflector about which plasma TVs cause least
interference.
>>
>> I have recently bought a (spare) CRT TV for when ours breaks down.  It 
>> is now 14 years old and must be due to go bang soon.  I have heard so 
>> many horror stories about these new-fangled flat screen jobbies, that 
>> I determined having a spare CRT TV was a sound investment, even if it 
>> means installing it purely for contest weekends.
>>
>> Ian
>>
>> From: "Callum M0MCX" <callum at mccormick.uk.com>
>>     
>>> Thanks, I dropped him a line.
>>>
>>> I've done everything I can (including using 25 x RFC-13 clip on 
>>> ferrites on every mains lead I can find) but still the 20dB over S9 
>>> persists on 160m.
>>> Tonight, I even powered the rig from a generator in case is was 
>>> common mode but to no avail.
>>>
>>> Removing my antenna does a good job though!
>>>
>>> Cheers,
>>>
>>> Callum McCormick
>>> http://www.m0mcx.co.uk/
>>>       
>
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