A bright "moon light" can keep solar panels generating solar power.
73, Lou KE1F
On 6/9/2022 20:09, Alan Bloom wrote:
Mystery solved! The spurs appear to be coming from a solar
installation on a house about 1/2 mile (3/4 km) from my house.
One interesting point is that the spurs do not go
Mystery solved! The spurs appear to be coming from a solar installation
on a house about 1/2 mile (3/4 km) from my house.
One interesting point is that the spurs do not go away at sundown, but
continue until fairly late in the evening. Apparently that solar
installation must have some kind
Alan,
If you have central air-condx/heating with variable speed compressor and / or
fans(s), shut it down and check for the spurs. What you are describing is the
same I see at my QTh when my unit is cooling/heating. I see spurs only wihen
the compressor and/or fans are running. My unit is a
Check out the RFI reflector r...@contesting.com
W0MU
On 6/7/2022 7:36 PM, Alan Bloom wrote:
Hi John,
In this case the Internet is not via DSL, it's via cable. The coax
comes out of the ground and then to the modem/router and from there
via a 150-foot Ethernet LAN cable to the granny unit,
OFDM is also what is used for [A]DSL, and, but at UHF, or SHF, digital
TV (terrestrial and satellite). It's also, at least in Europe, for
digital radio, at VHF. I think it is also used for 4/5G mobile. phones.
It is not intrinsically secure. It's main advantage is that it gets
close to the
ham band
frequencies.
73,
Hal
W7YNC
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Victor Rosenthal 4X6GP
Sent: Tuesday, June 07, 2022 10:30 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] I need a Sherlock Holmes
I don't have a guess as to the cause, but it might be worth trying a
common mode choke at the base of the vertical. I know that some of these
antennas (like the Cushcraft/MFJ versions) do have such chokes built in,
but I found that an additional one helped isolate the line from the antenna.
That's the strange thing about this. It doesn't have a grinding sound
or anything other than a clean carrier. Actually two carriers, the
weaker one about 150 Hz lower than the main one. That pretty much rules
out any kind of switching power supply, for example.
Maybe tomorrow I'll take my
I also had power line interference on 7MHz. Made a shielded loop using a
Hula hoop as support, BL2 for balanced loop to coax, and KX3 receiver.
Didn't take long to DF it out.
John KN5L
On 6/7/22 8:36 PM, Alan Bloom wrote:
> Hi John,
>
> In this case the Internet is not via DSL, it's via cable.
Hi John,
In this case the Internet is not via DSL, it's via cable. The coax
comes out of the ground and then to the modem/router and from there via
a 150-foot Ethernet LAN cable to the granny unit, where there is an
additional router with its own Wi-Fi.
Anyway, that entire system was
On 40M I see noise every 15 kHz. It's constant. Sometimes stronger,
sometimes
weaker, but it's always there. The pattern is obvious on the waterfall
display.
When I tune in one of the peaks, it sounds like a rhythmic grinding.
- Jerry KF6VB
On 2022-06-07 16:59, Alan Bloom
Hi Alan,
I've had issues with the service from street to modem. As I understand,
there's a VDSL band which overlaps 7MHz band.
In my case, it was reversed, any transmission on 7MHz would disable TV
and Internet service.
John KN5L
On 6/7/22 7:54 PM, Alan Bloom wrote:
> The ISP is TDS. They
The ISP is TDS. They offer up to 1 Gbps internet (I only pay for 200
Mbps) via cable.
Just as a sanity check, I just walked down to the main house and
unplugged the 150-foot LAN cable from the modem/router that feeds the
router in the granny unit here where the shack is. As expected, the
Hi Alan,
What is your TV/Internet provider?
John KN5L
On 6/7/22 6:59 PM, Alan Bloom wrote:
> The weird thing about these spurs is how clean and stable they are.
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Elecraft mailing list
Home:
The weird thing about these spurs is how clean and stable they are.
Switching power supply noise is generally not frequency-stable and it is
not a clean CW carrier. This one is actually TWO clean carriers,
separated by about 150 Hz.
Alan N1AL
On 6/7/22 17:43, Fred Jensen wrote:
I did the
I did the "Main Breaker 2-Step" and nothing went away. My noise on 80
and 40 on the K3/P3 is highly varied ...
1. Narrow discrete carriers [that appear linked, 25-35 kHz apart] come
and go, sometimes within seconds
2. Broad [5-10 kHz] bands of noise, often without any harmonic brethren
As part of christening my new QTH/antenna/rig here at N1AL, today I did
the test where I recorded all off-the-air spurious signals on all bands
and then threw the main circuit breaker for the house and did the
measurement again, powering the K4 from a battery. This is to identify
any spurs
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