Sure you do...from the link Tom provided. DownEast offers the
"transverters" in kit or built form. Tons of us are using their
equipment See also http://www.nlrs.org to see what we're all doing
up there.

Scott
N0EDV

KE5MBX wrote:

On Feb 12, 8:47 pm, Tom Ring wrote:

KE5MBX wrote:


Where the heck do you get a 3cm transmitter, though? ha.

http://www.downeastmicrowave.com/

And you can easily do 200KM on 200 mW, or 1000 KM per watt with a Dish
Network (or equivalent) antenna on 10G SSB forward scatter.

tom
K0TAR


so you don't go out and buy a "3cm transceiver" as you would for 2m,
10m, 40m, etc.?

Owen is right-- When a radio-man , had a guy come
into the shop, complaining about his truck
stalling when he transmitted. (freq around 160
MHz) Ran his truck, (idle), keyed rig, NO
Problem! Said to take it for test run- in low
gear, (abt. 2000-2500 rpm), and keyed the
transmitter, the rig STALLED! Wasn't a problem
when I installed radio- turned out they had
modified the truck to an Electronic Ignition!
This around 25 years ago. Tried various cures
but, they went back to the original "Points &
coil" system and worked fine! (this before these
were common on vehicles). Translation: YES, can
effect a vehicle, but times have changed: might
not be so supsceptable now a days (more problems
with the built in computer that they seem to
like to hide-- drill a hole in these- turn a car
into a thrashing machine! ). But BOTH can cause
problems. btw the power level for the problem was
a 50 Watt radio. and the SECOND problem (think
they more standardized now), could be placed
as the manufacturers stated, (ANYWHERE in the
vehicle) ! Now days must be within 3 foot of the
OBD2 Plug (used for smogging)! At least in the
U.S. As info, Jim NN7K

Owen Duffy wrote:
That design
problem was probably fixed rather quickly.

Back in the '70s I was working on a project that saw me reading papers on
the effects of EMR on various things. Amongst the papers was one dealing
with the susceptibility of the electronic anti-skid technology introduced
on heavy transport vehicles to meet (then) newer more stingent braking
distances. The braking systems were susceptible to ingress of RF,
resulting in wheel lockups. You can imagine the results of a 22 wheeler
at highway speed when a chook alongside comes up with "Breaker, Breaker,
any taker?" and locks up most of the wheels on the transport. I read
other papers on rear wheel lockups in a certain brand of passenger
vehicle due to RF induced downshift of the (electronically controlled)
automatic transmission at highway speeds.

The EMC issue seems better understood by vehicle manufacturers today,
though you still hear of RF triggered airbag deployments from time to
time.

Not to mention the

Laser detector shield (as advertised on radio)
(Which as near as I can figure, "Modulates" the
received "radar" signal, to a LOW frequency AM
signal to a dopler radar . I.E. a "RADAR
Caliberator" ! Banned in 6 states! Jim


Tom Ring wrote:
KE5MBX wrote:

Where the heck do you get a 3cm transmitter, though? ha.


http://www.downeastmicrowave.com/

And you can easily do 200KM on 200 mW, or 1000 KM per watt with a Dish
Network (or equivalent) antenna on 10G SSB forward scatter.

tom
K0TAR

Scott wrote:

Uh, not quite. While the X Band police radars are at 10.525 GHz, the
ham band is only from 10.000 to 10.500 GHz. Plus, pulse modulation is
not allowed on the 3cm band. We CAN use MCW, phone, image, RTTY, data,
SS, and test modulations. Hmmm, I wonder about plain old vanilla CW???
I don't see it mentioned...maybe "data" covers that nowadays (and with
a bandwidth limit of 100 KHz, we could smoke along at a LOT of WPM!!).

Scott
N0EDV

CW is almost always used for beaconing to align antennas. SSB is then
often used for the contact, however CW is used if it is marginal. Just
like HF, VHF and UHF contests. The major difference is that the
transmitter will often drift a couple hundred hertz during the QSO.

I have a few audio clips from the 10G cumulative contest last fall. If
anyone is interested I will email you a link.

Also see the article in this months QST by Jon Platt, W0ZQ.

tom
K0TAR

"Nate Bargmann" wrote in message

If something is sensitive to RF, it probably won't take much to cause it
to malfunction.


True. One time I was testing VHF antennas at 5 watts output in a quiet
garage. I kept hearing a clicking noise every time I keyed up. I traced
it to an analog multimeter on my bench. I was pegging the poor meter from
about ten feet away.

I installed an Icom 2000 into my Commodore, a 92 VP sedan with a V6 engine,
and everytime I keyed the mike at full TX power the engine would stall,
whether at idle or on the road, very disconcerting!
I cured the problem by re-routing the coaxial cable away from the computer.
VK2KCE

"Nate Bargmann" wrote in message
et...
: It doesn't take much. Back in the early '90s a group of us were returning
: from a hamfest and I was riding in the back seat of one guy's late '80s
: Ford something or other (Crown Victoria, maybe?). I was using my HT to
: talk to the other car on 2m and the driver noticed that his cruise control
: was gaining speed and when I unkeyed it settled down. Once I figured out
: it was my HT causing it, loads of fun ensued.
:
: If something is sensitive to RF, it probably won't take much to cause it
: to malfunction. The fact is that nobody does RF shielding or protection
: for consumer electronics, so there is no set power limit below which a
: device may not be affected.
:
: - Nate
:
: --
:
: "The optimist proclaims that we live in the best of all possible worlds,
: the pessimist fears this is true."

"Stefan Wolfe" wrote in
:


"KE5MBX" wrote in message
ups.com...
Hi,
What's all this business I hear people talking about blasting
people's car stereos or killing cars altogether with high-power RF? I
run 2m, 10m, and 11m in my jeep and I'd like to sort out the fact
from the legend and find out what kind of power I can use without
risking damage to my jeep or cars around me. At what power level is
front-end overload to a nearby radio likely? At what power level is
damage likely, and to what componets?

I am currently using only 50 watts on a 5/8 wave (2m), 25w on a 1/4
wave (10m), legal 4w on a 1/4 wave (11m)

Thanks,
Nelson KE5MBX


I think over 100W you may have problems with HF and VHF. It can be a
problem.

One thing that works real well is to transmit near the x-ray radar
band where you have privileges. The traffic may slow down a bit as you
set off the radar detectors :-)

Yeah, and it REALLY lights up the detector detectors....


--
Dave Oldridge+
ICQ 1800667