I had touch switch lamps here in my first rental house over here and there was little I could do to stop them coming on a 1W ERP on 137kHz - they were replaced with non dimmer non touch type.VE7 SL had something on his blog on a dimmer that didn't cause issue I believe
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[email protected]To:
[email protected]Date: Thu, 10 Mar 2016 15:52:35 +0000
Subject: LF: Re: Touch switched lamp influenced by lf/mf transmission
Hi Chris I doubt it. It sounds like an internal mod
would be required.....definitely a no-no unless it is your own unit. If it is
possible to supply some more detail i.e. make and model, I would like to pass
this to the RSGB EMC committee, more for information than anything I doubt
we can do anything about it. It is basically a sensitive unit, its not really
"non compliant" with the regs, I think, as there is no spec below 150kHz.
The problem is the touching body acts as an aerial.
Alan
G3NYK
----- Original Message -----
Sent: Thursday, March 10, 2016 3:10
PM
Subject: LF: Touch switched lamp
influenced by lf/mf transmission
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
