Hi Stefan,
that might do the job, but I'm not sure of the combination "very expensive
lovely designer lamp" and "aluminium foil" ;-)
73, Rik ON7YD
________________________________________
Van: [email protected] [[email protected]]
namens DK7FC [[email protected]]
Verzonden: donderdag 10 maart 2016 22:26
Aan: [email protected]
Onderwerp: Re: LF: Touch switched lamp influenced by lf/mf transmission
Another idea may be to shield the switch with bonding aluminium foil
arround the switch. Connect the foil to earth (PE), if a PE wire is
available inside the switch. A small field must stay free, to lay the
finger on and turn on/off the switch, but the rest could maybe be protected?
73, Stefan
Am 10.03.2016 21:27, schrieb Lawrence Galea:
> Chris,
> If the neighbour accepts and the lamp uses an earth and there is space
> inside the lamp you can try a couple of capacitors from both sides of
> the mains to earth, shunting the rf picked up to earth.
> You can also include a capacitor across the mains, all inside the lamp.
> Of course all capacitors should be suitably rated.
> Regards
> Lawrence
>
> On 3/10/16, Dr. Wolf Ostwald<[email protected]> wrote:
>
>> hi Chris !
>> You need an E-type ferrite core to put the 230v cord in. This will kill
>> the sensitivity to Your tzransmitted RF.
>> CQ-DL shop once had them, if You cant get any, just contact me
>>
>>
>> wolf df2py
>>
>>
>> Am 10.03.2016 um 16:10 schrieb christoph:
>>
>>> Dear all,
>>>
>>> my neighbour uses a very expensive lovely designer lamp switched by a
>>> four step touch switch. Unfortunately that switch follows keying of my
>>> mf transmitter. Is there somebody having experience with that kind of
>>> malfunction?
>>>
>>> The distance to the antenna feeding point is approximately 16m (ANT
>>> voltage app. 2.5kV). I tested a chain of eight common mode chokes in
>>> series to the affected lamp (mains separation of more than 100kOhms at
>>> the desired frequency). That showed improvement in sensitivity but the
>>> switch did not work anymore during transmission. The most effective
>>> solution is replacing the touch switch by a normal dimmer.
>>>
>>> Are there better ideas to keep in use the original touch switch?
>>>
>>> 73, Chris
>>>
>>> dl7saq
>>>
>>>
>>
>>
>
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