Hi Jim,
Thanks, and I have shared a lot of documents with the folks that cover the
major points your section on variable speed drives covers, but found that I
still had to make a recommendations list for them (taking into account
simplicity of install, cost, and highest probability of success),
Don, you should request that the technician install the new conduit runs using
compression couplings and connectors instead of the more common setscrew type.
Compression couplings make a much better electrical connection between sticks
of conduit which will be better to keep the conduit acting
On Wed,5/13/2015 11:14 AM, Don Kirk wrote:
The local technician is now planning on additional changes since the input
line filters have not totally mitigated the problem (but they sure helped),
and will provide an update when I have new information to share.
Hi Don,
You might want to refer
Don,
I have referred to VFD-s in an early posting as RF
Weapons of Mass-Destruction. Still, they are useful and I
got one in my house.
As the contractor in your description did, I installed a
line filter on the input side. I also installed a three
wire common mode choke on the three phase
I've not reported on this issue in a long time, but finally making progress
with interference that's originating from an apartment complex 0.4 miles
away. Back on Dec 11, 2014 we (myself and the apartment complex
maintenance manager) tracked the problem down to the variable speed drives
that are
Mfj Nuller will not work because the signal is in the same direction of my
300 deg pointing pennant.
My guess is that we should be able filter and shield properly at the source
Don
On Sunday, December 14, 2014, W2PM via Topband topband@contesting.com
I have done a little bit of research into the variable speed drive motors
that are commonly part of eco-friendly green HVAC systems.
I have found in many cases that the installer sells SEER-rated components
as part of their most efficient packages, but in most cases the
installation takes no
Sounds like a job for the MFJ nuller. The good news being its a point source
and should be easily handled. It may cost you several months of frustration for
no good outcome otherwise but perhaps it's worth a try if there is a simple
bonding issue there.
Sent from my iPad
On Dec 14, 2014, at
On Sat,12/13/2014 5:35 PM, Don Kirk wrote:
Now going back to the contractor that installed the equipment in an attempt
to better understand the hardware in the unit
That smells like a Variable Speed Drive, the heart of which is a
switching power supply that generates pulses in the 10 kHz
Recently noticed an increase in my noise level on 160 meters (in the
direction of my 300 degree pointed pennant), and about 3 weeks ago I
tracked it down to a new apartment complex which is located 0.41 miles
away. Today I noticed that the signal had a repeating pattern of
approximately 30
Of
Don Kirk
Sent: Friday, October 24, 2014 2:41 PM
To: topband
Subject: Topband: Boradband noise on 160 meters tracked down to
apartment complex
Recently noticed an increase in my noise level on 160 meters (in the direction
of my 300 degree pointed pennant), and about 3 weeks ago I tracked
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