Interesting that Jim's Starlink is noisy.
I have the newer square dish and second gen router with 50' of cable
from router to dish right under beams. Quiet as a mouse.
It accepts RFI as well. No hiccups at full power up to 6m.
73,
Steve
W1SRD
On 5/21/2023 11:34 PM, Jim Brown wrote:
On 5/21/2023 6:11 PM, n0tt1@juno.com wrote:
Personally, I think it's
because they don't want to deal with filtering out all those RF
square waves in the vehicles. Or maybe they know that
EU is, or has already, discontinued Broadcast AM radio.
This has been widely reported in the press for several months. I've
been driving a Tesla Model 3 for 2.5 years, and have a VHF/UHF FM rig
in it, no observable RF noise. When looking for installation advice, I
came across several youtube videos from an OT in 5-land who first did
that, then advanced to an HF rig. He reported that to be pretty noise
free as well. The 12V system won't support a lot of power. I've
charged at home from the outbuilding that houses my shack, first from
a 120V/15A outlet, now from 240V/30A, can't hear any noise with my
Kenwood TH-F6A (wide-band RX) probing along the power cable, or in my
radios in the shack.
The Tesla designers were VERY good about RF shielding that's quite
frequency-selective. A talkie with a duck is deaf inside the vehicle,
but cell phone works great inside the vehicle at knee level in the
center pedestal (and, of course, in my pocket).
As to RFI to the AM band -- I haven't probed that, but no issues on
160M when charging.
Vehicles are sold worldwide, so discontinuance of AM broadcasting in
any large market could drive mfrs to drop AM in vehicles. AM has been
on a long downward spiral for several decades, and noise has long been
a problem. A colleague was chief engineer at WLS in the '80s and '90s
(maybe longer, don't remember when he retired). Their 50kW clear on
890 kHz was maybe 25-30 miles S of Chicago, and had chronic complaints
of ignition noise from Fords that wiped them out in the northern
suburbs -- I'm guessing 50 miles or so from their omni stick. And as
we all know, noise has increased exponentially in the intervening
decades, and the AM band takes the greatest hit.
Starlink, a related company, is quite the opposite. The PSU for my
dish is mondo-noisy, took a half-dozen ferrites with multiple turns to
quiet it down. I love that system, which I bought as redundancy for
ComCast, whose power backup was next to non-existent. They've since
improved quite a lot. But with no cell service in the mountains, we
can't be without internet, so it's great to have both systems.
73, Jim K9YC
73,
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