For what it's worth, when LEDs first became affordable I thought the
perfect place to try one out was in the garage door opener. With all
the vibration and the constant cycling on and off every time the beam
was broken an LED bulb seemed like a perfect fit. We ran into an issue
immediately.
Thanks for the garage door opener experience. I had my door and opener
replaced a few months ago. The manual for the opener (Lift Master)
specifically says not to use LED bulbs. I was scratching my head over that
but did use CFLs in the opener. I asked the installer why that
Wonder if it's "OK" to use "quality" LED bulbs and get away with it?
I've got the full Lift Master setup... I'll check the two types of LEDs
I have (one CREE based, the other not) and see if it impacts the remote
opener's ability to function.
73,
__
Clay Autery
On
FWIW, we have an old Lift Master 1/2 Horsepower garage door
opener. It's manual said not to use CFLs (it is too old to know
about LEDs). I tried CFLs anyway. They lasted less than 2 weeks
before they died.
73 Bill AE6JV
---
Thanks, Bill.I have the newer DC motor with Battery Backup Liftmaster, but
I’m guessing the receivers might be similar. Interestingly, in the new manual
they actually recommend CFLs but warn against LED. Obviously the front end of
their receiver is not designed to Elecraft standards
If you choose to use incandescent lamps in the garage door opener,
choose the "heavy duty vibration resistant" bulbs. These can also be
found labeled as "ceiling fan" bulbs. Seems that they have 3 or 4 wires
supporting the filament as opposed to only two wires for the standard bulb.
73
Hi to the group
I have a 40 year old Sears chain drive door opener with two Cree led bulbs.
They have been there for over 2 years with no problem using the remote. Every
bulb in my house except the oven and refrigerator has been replaced by Cree led
bulbs. I have run my K3 and P3 on each
On 1/26/2016 12:59 PM, Bob McGraw K4TAX wrote:
> If you choose to use incandescent lamps in the garage door opener,
> choose the "heavy duty vibration resistant" bulbs. These can also be
> found labeled as "ceiling fan" bulbs. Seems that they have 3 or 4 wires
> supporting the filament as
Hi,
I have a series of three articles on RFI, located at:
http://nk7z.net/category/info/mitigation-of-rf-interference/i-have-rfi-series/
the second article down, titled "I have RFI, now what: House Cleaning"
has the some of the correct part numbers for the Fair-Rite corporation
snap on ferrites.
In a past job, I designed low and medium power phase cut dimmers. Ferrite
clamps/beads will be almost useless. Well designed filters will have
rather large series inductors (1 to 10 mH) and high voltage caps designed
to filter the high harmonic content caused by the Triac switching. Cheap
ones
On Mon,1/25/2016 9:16 AM, Bob wrote:
Drop some serious bucks on a Lutron model and try it.
Lutron dimmers are not "serious bucks" unless you want special features.
73, Jim K9YC
__
Elecraft mailing list
Home:
My simple (=cheaper) solution is to get rid of the dimmers all together.
How much is a good old fashioned light switch at the big three, $1.50,
two buck if you want a matching switch plate.
When we bought our house I replaced six dimmers. Didn't hear a peep from
"she who must be obeyed".
I have
Be careful. Not all LED's are the same.
Early on I purchased a cheap two-pack at HomeDepot.
Later I was using brand name. I started to have some noise problems -
the cheap no-names were causing problems. I am almost all LED's now.
I started because my YL could hear the CFL power supply
Thanks to all who have posted on this thread. Very informative. I have an
entire house full of Lutron dimmers — all servicing halogens — circa 2001
design (pre-LED). And being a green guy with solar panels on the roof and
plug-in hybrid, I was considering LEDs for the whole house. Will step
I have a number of Lutron Maestro dimmers including a couple ELV types.
IIRC the standard models are around $30 and ELV something like $100/ea.
I have not noticed RFI with any of them, including operating 6m EME.
73,
Josh W6XU
On 1/25/2016 3:03 PM, Jim Brown wrote:
Lutron dimmers are not
Sent: Monday, January 25, 2016 7:23 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Filtering RFI from LED &
flouresence Dimmer Switches
I have a number of Lutron Maestro dimmers
including a couple ELV types.
IIRC the standard models are around $30 and ELV
something like $100/ea.
I
On Mon,1/25/2016 5:57 PM, David Ahrendts wrote:
Curious, does anyone have an example of LED noise recorded?
LEDs do NOT make noise. What makes noise is the switch-mode power
supply, and/or the dimmers used to make them run.
73, Jim K9YC
On Sun,1/24/2016 6:56 PM, johnpierce wrote:
Some were snap on beads.
I am assuming that locating them in the power feed lines to the dimmer box
would help in reducing the RFI. What do you recommend?
Replace the noisy dimmers with quiet ones. Lutron makes dimmers that are
RF quiet. Available
I have several dimmers around my house that generate 20db of noise on the HF
bands. I have seen some recommendations for ferrite beads that can be used
for filtering. However, I cannot find that info. Some were snap on beads.
I am assuming that locating them in the power feed lines to the
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