Gang,
I made a video taken from my pickup sitting in the garage with the radio
on and all you could hear was noise. Then as I backed up and got
farther way from the opener the noise slowly died down and you could
hear the station that had been covered with noise. I posted it to the
Chamberlain Facebook page. I emailed their tech support team photos of
everything. Their response was that according to the FCC they are legal.
I stripped 9 feet of cat5 to make the RF choke and took two of the pairs
and twisted them together and wound them through a mixture 31 toriod to
make an RF choke. I also put a .01 cap from each lead to ground right
where they came out of the opener. I also mounted the toroid as close
as I could to the opener so that there are only a couple of inches of
wire before the toroid. Still have problems.
Steve
On 9/14/18 12:09 PM, Russ Edmunds wrote:
Some opener companies have different sensor units which greatly reduce RFI
but you have to go directly to the mfr and ask.
I did that many years ago and have had none of that since.
Russ Edmunds
<[email protected]>
On Fri, Sep 14, 2018 at 1:00 PM R. Colin Newell <[email protected]>
wrote:
RF chokes!
I replaced my garage door opener with a new unit - whisper quiet.
Colin Newell - Victoria - B.C. CANADA -
On Sep 14, 2018, at 9:57 AM, Stephen Hawkins <[email protected]> wrote:
Patrick et al,
I have found the worst RFI generator I have heard in quite a while. We
had a nice garage built and the contractor installed two brand new
Chamberlain garage door openers. The RFI comes from a cheap, dirty
switching supply that uses the leads going to the sensors at the bottom of
the doors and to the switch by the people door as antenna. It ruins the
BCB and 160M. I tried to post a photo of the screen on my Flexradio
showing the interference but it doesn't get through. It is bad despite
replacing all the wires with cat5 and winding an extra 9 feet of twisted
pair striped out of the cat 5 through a Mixture 31 toroid. I have to power
them off at night.
I'll email photos to anyone who wants.
Steve NG0G
--
Stephen Hawkins NG0G
[email protected]
73 49 111 01001001
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Stephen Hawkins NG0G
[email protected]
73 49 111 01001001
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