CHP just did a major upgrade recently (within the past two years) and are
still using 39, 42, 44, and 45 MHZ as well as all the VHF/UHF stuff and
multiband scanners.
I've been told that they run 110 watt low band GE radios.
73, Todd KH2TJ
heard (about ten
Eric,
You might let this one through.
Ed Eklin, K8ZZ, is 300 counties shy of transmitting from all counties in the 50
states. He drives Hondas. He is available on QRZ and enjoys questions. He has
learned how to transmit with his K3, KX3 with 100 amp, etc., over the years
without having any
This OT thread was closed almost an hour ago.
In the interest of relieving reader overload in the face of the very high number
of postings on this topic today, please move it off list if you want to keep
discussing it.
73,
Eric
/elecraft.com/
On 5/6/2019 2:02 PM, Jim Brown wrote:
On
On 5/6/2019 12:43 PM, Barry Baines via Elecraft wrote:
Are there currently any new make/model ‘ham friendly' vehicles that would be
appropriate to install amateur radio equipment such as VHF/UHF mobile rigs?
I've never had RFI issue with VHF/UHF gear in any car that I've owned.
Max power
Folks - we are way over the OT posting limit for this topic. Over 35-40 since
earlier this morning.
Let's close the Mobile high Power thread now. (Before many other reader's delete
keys wear out ;-)
73,
Eric
Lost Moderator, etc.
/elecraft.com/
On 5/6/2019 12:41 PM, Bob McGraw K4TAX wrote:
> Nope not out of service here. The 40 MHz band is used in Tennessee
> today by the Tennessee Highway Patrol and Department of Safety. Look
> at any of the TN black and whites and notice the 5 ft whip with the
> spring and ball at the base. All
Wayne:
> On May 6, 2019, at 11:31 AM, Wayne Burdick wrote:
>
> My Prius is so dependent on embedded processors that I take no chances -- I
> run only 10 W mobile. Yes, it's harder to make contacts, but my car doesn't
> have E-peleptic seizures.
Your comment about the Prius raises a broader
Nope not out of service here. The 40 MHz band is used in Tennessee
today by the Tennessee Highway Patrol and Department of Safety. Look
at any of the TN black and whites and notice the 5 ft whip with the
spring and ball at the base. All of those radios are 100 watt
mobiles. And when
I worked in the 2-way radio business for 30-years here in AK; did a
lot of mobile installs.
Typical police/ambulance radios ran 110w MOT stuff. Some commercial
ran 25-50w with smaller footprint sized radios. Nearly all is either
high-band VHF 150-174 MHz) or UHF (450+). All were wired with
OEMs have gone back and forth over the years with the "one true ground"
vs completely distributed grounding via the chassis. They seem to
currently be in the phase of using distributed localized grounding
points (with several ground return wires per location), a kind of hybrid
grounding system, if
This information is now 20+ years out of date, so I don't know what the
car companies do any more about HF EMI testing (if anything). Some of my
radio buddies were employees of Ford, and they would arrange to drive
new/developmental cars around under the antenna field at the old VOA
relay site
It doesn't take a KW. During the run-up to Cycle 19, Dad let me put a 10
meter 40 W AM rig in the family car. Gonset converter on steering
column, TX in trunk with PE-103, 8 ft whip on a bumper chain mount. 10
meters was open pretty much 24/7 then. The corona ball had been knocked
off by a
CHP mobile in your and my area (Golden Gate Division) is licensed for 100 W.
https://www.radioreference.com/apps/db/?fccCallsign=KA4993
Frequencies are from 39 to 46 MHz.
https://www.radioreference.com/apps/db/?aid=995
wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my
They still use 45/46mHz in my area for fire, EMS, and other services but I'm
not sure of the power levels. I've been out of EMS for years. Years ago in my
mobile I ran 100 watts on VHF FM. In recent years I ran 50W VHF FM and 100W on
HF/50mHz SSB w/o issue.Ken WA2LBI LG G6 -- Original
On 5/6/2019 10:23 AM, Dave New, N8SBE wrote:
The other unfortunate effect of designing for police/fire/ambulance
service, is that all those radios are now VHF/UHF and up. No more HF
radios. They went out with the state-wide sheriff's networks of old
that ran on 40 MHz or so.
One exception
On 5/6/2019 10:12 AM, Ken Winterling wrote:
are used in services that use
transmitters such as police, fire, ambulance, taxi, etc.
Because of the wavelengths involved, RFI coupling into circuitry at HF
is VERY different from VHF/UHF, which is used by these services. Also, I
don't know
2019 13:38
Subject: Re: [Elecraft] Mobile high power
On 5/6/2019 9:14 AM, Bert Craig wrote:
> I run approx. 200 watts from my mobile. It's been trouble free over the last
> four or five years. To the best of my knowledge, no adverse effects on other
> vehicles either. I do use LMR-240uf t
11:24
Subject: [Elecraft] Mobile high power
Has anyone considered the liability of running very high power mobile?
What if you're running a KW, and gave a call on 20M. Suddenly, the guys
brakes in the vehicle next to you locked up causing a multiple vehicle
crash?
I realize this is an extremely
I took delivery of my 2006 Toyota Sequoia SUV in time to make multiple
trips moving from Chicago to NorCal, carrying stuff like master tapes,
tech equipment, and other things I didn't want to fight with the moving
company about their losing it or breaking it. Prior to the first trip, a
ham
Most modern vehicles are tested for EMC in large chambers, where they
are bombarded by high-power frequencies that extend up into the
microwave range. So, they are relatively immune to external RF fields.
On the other hand, they are frequently not designed to withstand a
powerful onboard
You see lots of mobile radios out in rural areas. Volunteer fire
departments. This need won't go away soon.
Vehicle electronic sensitivity is nothing new. At least 20 years ago I
recall keying 100 watts in traffic on my morning commute and seeing the
trunk of the Lexus in front of me pop right
On 5/6/2019 8:39 AM, Mike Flowers wrote:
> What implications might there be for mobile Amateur Radio operation
> when autonomous vehicles are in wide-spread use?
"I have been told" (by folks who work in the field) that the Society of
Automotive Engineers (SAE) does have RFI immunity standards
I believe all of the vehicles I've owned have had a statement in their
manuals about transmitters. Despite that, vehicles from many
manufacturers, domestic and foreign, are used in services that use
transmitters such as police, fire, ambulance, taxi, etc. Some services use
multiple radios in
https://www.qrz.com/db/N7WS
Scroll to the bottom.
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My Sprinter is rated by Mercedes to handle 100W at HF. I'm pushing that a
little, but that is another reason I am satisfied with 250W. Sprinters are
used a lot for ambulances, work trucks, and government vehicles, all with
radios, so I figure if they had RF problems, they would have to fix them. I
My 2014 Honda Insight includes an almost identical statement in its manual.
I've only dared operate HTs with magmounts in this car, so far with
impunity.
On 5/6/19 9:45 AM, Phil Hystad via Elecraft wrote:
> My 2018 Toyota RAV4/Hybrid has a warranty statement saying “Do not operate
> mobile
I ran mobile CW with my Begali Paddle sitting on the middle console of my 2004
Chevy HD2500 4x4 pickup. I had a Hi-Q antenna on the rear top mounted on the
side panel making use of one of the stake holes to feed coax. Operated like
that for about 10 years. 100 watts from an Icom 706 MkIIG.
Back in 1995 during the Nordic Games here in Thunder Bay I was using my parents
Ford SUV and using a 2 meter handheld and the vehicle was surging faster as I
talked. When I would unkey the vehicle would go back to normal.
Sent from my iPhone
Fred VE3FAL/CIW649
> On May 6, 2019, at 12:21,
Right. But it's the electromagnetically underachieving cars a foot away from
you, on four sides, that might suffer.
Yet another challenge in the era of technology that doesn't gracefully degrade.
Wayne
> On May 6, 2019, at 9:14 AM, Bert Craig wrote:
>
> I run approx. 200 watts from my
Tire sensors are wireless, and the protocol has been reverse engineered.
Interesting reading in the early articles.
On Mon, May 6, 2019, 9:06 AM Wayne Burdick wrote:
> Ham radio as stealth EMP weapon. Not good.
>
> Wayne
>
>
> > On May 6, 2019, at 9:02 AM, Bayard Coolidge, N1HO via Elecraft <
>
of the amp and
the antenna. Also, all units are grounded directly to the vehicle chassis and
bonded to each other. So far, so good.
Vy 73 de Bert
WA2SI
-Original Message-
From: Charlie T
To: elecraft@mailman.qth.net
Sent: Mon, 06 May 2019 11:24
Subject: [Elecraft] Mobile high power
Has
Normally when you buy a used, tube-type kilowatt amplifier you don't
think to ask if it has been used mobile.
I once bought a used (actually VERY used) Drake L4B amplifier that had
been owned by Frank W6HWL "Highway Louie". He had a big old Cadillac
that had been fitted with the extra-large
Ham radio as stealth EMP weapon. Not good.
Wayne
> On May 6, 2019, at 9:02 AM, Bayard Coolidge, N1HO via Elecraft
> wrote:
>
> There are implications for fixed-location operators as well. I can only run
> about 175W into my (very) shortinverted-L on 630m - above that, I trip the
> car
There are implications for fixed-location operators as well. I can only run
about 175W into my (very) shortinverted-L on 630m - above that, I trip the car
alarm on my upscale European-made SUV parked in the driveway.I'm in a fairly
crowded neighborhood - house lots are on the order of 1/5th of
I think there is the possibility of great mischief if autonomous vehicles lack
sufficient RFI protection.
What implications might there be for mobile Amateur Radio operation when
autonomous vehicles are in wide-spread use?
-- 73 de Mike Flowers, K6MKF, NCDXC - "It's about DX!"
> On May 6,
More likely you would fry his cars computer and he would be dead in the
water. But with electronics and RFI anything could happen. With my luck
it would be my brakes that locked and I'd be rear ended.?? Steve kb1chu
On 5/6/2019 10:22 AM, Charlie T wrote:
Has anyone considered the liability of
Many of today's vehicles rely on an internal wireless network for
communications from various components in a vehicle. My truck has a
network that communicates from the rear end to the computer up front.
There are no wires or cables in that regard. Although it seems immune
to most RF I can
My Prius is so dependent on embedded processors that I take no chances -- I run
only 10 W mobile. Yes, it's harder to make contacts, but my car doesn't have
E-peleptic seizures.
Computers in general are not very RFI-proof. I discovered this the hard way
when I was running 100 W to an end-fed
Has anyone considered the liability of running very high power mobile?
What if you're running a KW, and gave a call on 20M. Suddenly, the guys
brakes in the vehicle next to you locked up causing a multiple vehicle
crash?
I realize this is an extremely hypothetical and unlikely case, but these
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