14, 2018 9:57 AM
To: irca@hard-core-dx.com
Subject: [IRCA] RFI on the BCB
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
Colin, Nick et al,
I avoided taking the openers apart until I was done dealing with
Chamberlain so they could not blame any problems on me.
I used the Mixture 31 toroids because I already had them. I'm very
willing to order some Mixture 75s.
I ran into another ham on the Flexradio
Exactly what I did with a brand new CISCO WIFI router — they used a 99 cent
Chinese switching supply that was butt ugly across the LW and MW BAND for a 100
yard circle!
Imagine: one freaking wall wart blaffing 4-6 urban properties. That’s criminal.
Anyway - I replaced it with a quieter
Have you tried using type 75 cores? Type 31 is
specified for somewhat higher frequencies than #75.
Also, is the switching supply the actual source
of the problem? If so, is it possible to replace
with a less noisy one, or is it integral to the unit?
best wishes,
Nick
At 17:24
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
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
On Fri, Sep 14, 2018 at 1:00 PM R. Colin Newell
wrote:
> RF chokes!
>
> I replaced my garage
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 wrote:
>
> Patrick et al,
>
> I have found the worst RFI generator I have heard in quite a while. We had
> a nice garage
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
