[ARC5] externally generated noise from switching controllers.

Tue Jun 8 23:27:11 EDT 2010

Hi Brian,
These lights are on or off.  There is no control over intensity - except by changing the series resistor.  If I was going to control the intensity I would do a very nasty thing.  I would connect an X2 rated cap (or series of X2 rated caps) in series with the primary of the power transformer.  (Or alternately a big fat inductor).

Les

> ----- Original Message -----
> From: "Brian Clarke" <brianclarke01 at optusnet.com.au>
> To: "Discussion of AN/ARC-5 military radio equipment." <arc5 at mailman.qth.net>
> Subject: Re: [ARC5] externally generated noise from switching controllers.
> Date: Wed, 9 Jun 2010 13:08:46 +1000
> 
> 
> Hello Leslie,
> 
> What dynamic dimming range do you get with these LEDs?
> 
> 73 de Brian, VK2GCE.
> 
> ----- Original Message -----
> From: "Leslie Smith" <vk2bcu at operamail.com>
> To: "Discussion of AN/ARC-5 military radio equipment."
> <arc5 at mailman.qth.net>
> Sent: Wednesday, June 09, 2010 7:51 AM
> Subject: Re: [ARC5] externally generated noise from switching controllers.
> 
> 
> > Hello Michael,
> > The company I work for, Poolstore International, makes and sells 
> > waterproof (submersible) pool lighting.  The poolstore lights 
> > consist of a series parallel circuit of (about 48 or 51 LEDs).  
> > Three LEDs are connected in series with a limiting resistor.  
> > Power comes from a 12V transformer, feeding a bridge rectifier.
> >
> > Very expensive, but very quiet.
> >
> > Les
> >
> >
> >> ----- Original Message -----
> >> From: "Michael Bittner" <mmab at cox.net>
> >> To: "Discussion of AN/ARC-5 military radio equipment." 
> >> <arc5 at mailman.qth.net>, "Bob Macklin" <macklinbob at msn.com>
> >> Subject: Re: [ARC5] externally generated noise from switching controllers.
> >> Date: Tue, 8 Jun 2010 14:45:23 -0700
> >>
> >>
> >> Supposedly there are light dimmers available that do not generate RFI.
> >> Anyone know who makes these and where they can be bought?  If I can obtain
> >> some, I will give them to my neighbors.  Mike, W6MAB
> >>
> >>
> >> ----- Original Message -----
> >> From: "Leslie Smith" <vk2bcu at operamail.com>
> >> To: "Bob Macklin" <macklinbob at msn.com>; "Discussion of AN/ARC-5 military
> >> radio equipment." <arc5 at mailman.qth.net>
> >> Sent: Tuesday, June 08, 2010 1:38 PM
> >> Subject: [ARC5] externally generated noise from switching controllers.
> >>
> >>
> >> > Hello group,
> >> > I subscribe to a newsletter from NXP semiconductors.
> >> > The newsletter describes or advertises new products - devices,
> >> > chips, application notes.
> >> >
> >> >
> >> > Here is the latest:
> >> > SSL2103 - SMPS controller IC for dimmable LED lighting
> >> >
> >> > This chips is a switching regulator, fed directly from the 
> >> rectified > mains.
> >> >
> >> > I ask (we all know the answer):
> >> > What will happen to your nice quiet RAK and RAL receivers when
> >> > these noisy critters are installed in every house in every suburb?
> >> >
> >> > I say the noise from a switching LED controller will make a 12K8s
> >> > as quiet as the central Australian desert at mid-day. (it's very
> >> > quiet in the desert at mid-day).
> >> >
> >> > Is there nothing we can do so stop such lunacy on a city-wide scale?
> >> >
> >> > Yes, this is off-topic, but it's something of interest to all, 
> >> I'm > certain.
> >> >
> >> > Les
> >> > formerly VK2BCU
> >> >
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