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Re: LF: Touch switched lamp influenced by lf/mf transmission

To: [email protected]
Subject: Re: LF: Touch switched lamp influenced by lf/mf transmission
From: "Dr. Wolf Ostwald" <[email protected]>
Date: Thu, 10 Mar 2016 20:25:07 +0100
In-reply-to: <[email protected]>
References: <[email protected]>
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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


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