Hello All:
Thank you to everyone that responded to my question both on and off the
reflector.
My summary from the many responses is that the effected TV probably has
capacity (touch) controls.
I suspect this is true, but I have been unable to visit my neighbor to check
this and do any further tests.
Unfortunately, my neighbors are leavening tonight for a sunny week in 6Y, so
I will be unable to check and undertake further testing until they get back.
I promise to report back to the reflector with my findings as soon as
possible.
I must confess I am somewhat concerned that if proximity-capacity switches
are the culprit, a solution might not be found.
de steve ve6wz.
--------------------------------------------------
From: "R March" <n7ua@embarqmail.com>
Sent: Saturday, December 31, 2011 10:16 PM
To: "VE6WZ_Steve" <ve6wz@shaw.ca>
Subject: Re: [RFI] TV turns on-off when TX
> Steve, I have had problems with Samsung monitors because they have
> capacitive switches built in to the panel body. The capacitive touch
> switches are extremely sensitive to RF and are often stimulated directly.
> If the TV uses the same switches, I will give you ten to one odds that is
> the problem. There is nothing that can be done except return the TV. I
> had to return my monitor. Good Luck, Bob N7UA
>
> On 12/31/2011 12:51 PM, VE6WZ_Steve wrote:
>> Thanks for the few responses I have received already.
>>
>> I repeat as stated in my original post....I have isolated ALL connections
>> going to the TV.....there is NOTHING connected to the TV except the
>> power.
>> I understand the common mode problem, and have much experience using
>> torroids for RFI ingress. I am well supplied with various Type 31
>> material snap-ons and large torroids.
>> This "seems" like a unique situation were ingress is not via external
>> connection, but I will try a brute force filter in case ingress is via
>> differential mode on the power line....tnx Dave.
>>
>> BTW...This is a new problem, and I have no problem with any TVs in my
>> house...it is just my neighbors which is a very late model (only one
>> month old) unit.
>>
>> A bit more info on the station:
>>
>> My antenna is perfectly resonant homebrew 2 el. Yagi at 100'.
>> There are 2 very robust choke baluns in series at the feedpoint, (one
>> solenoid and another material 31 torroid).
>> The antenna is matched at the feedpoint to accommodate the narrow
>> bandwidth
>> of the Yagi.
>> http://www.qsl.net/ve6wz/intro.htm
>>
>>
>> Steve ve6wz.
>>
>>
>> From: David Bowker
>> Sent: Saturday, December 31, 2011 1:15 PM
>> To: ve6wz@shaw.ca
>> Subject: [RFI] TV turns on-off when TX
>>
>>
>> Steve,
>>
>> A bit more info would be helpful to assist in diagnosing the possible
>> methods of ingress of RF into the TV, such as:
>>
>> * Does the TV receive it's input signal from CATV, SATELLITE DISH, or OTA
>> antenna?
>>
>> * Does it turn ON/OFF and VOL change with the (antenna/CATV/satellite) TV
>> signal input disconnected?
>>
>> A toroid choke on the power line entrance to the TV may not be effective
>> if the RF is entering into the power utility system as a differential
>> mode signal traveling on the utility entrance to the dwelling. If this
>> is the case, only a brute force power line filter would be effective.
>>
>> I have a Samsung 37" LCD TV and run 1.5 kW to 4 element vertical arrays
>> on 80M& 40M which are 150' from my DirecTV satellite dish and when the
>> array is pointing directly at the dish (~ 6 kW ERP) I do not experience
>> any abnomalies.
>>
>> 73, Dave, K1FK
>> Fort Kent, ME
>> _______________________________________________
>> RFI mailing list
>> RFI@contesting.com
>> http://lists.contesting.com/mailman/listinfo/rfi
>>
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