On Feb 12, 5:50 pm, "Stefan Wolfe" wrote:
"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 :-)

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

On Feb 12, 5:15 pm, "KE5MBX" wrote:
On Feb 12, 5:50 pm, "Stefan Wolfe" wrote:



"KE5MBX" wrote in message

oups.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 :-)

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

10.525 GHz is an amateur band, and is the same band used by the X-band
radars, and transmitters are readily available for $100. Gunnplexers
are one example, but people also use modified "microwave door openers"
to experiment in X band.

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

wrote:





10.525 GHz is an amateur band, and is the same band used by the X-band
radars, and transmitters are readily available for $100. Gunnplexers
are one example, but people also use modified "microwave door openers"
to experiment in X band.

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

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

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.?

"KE5MBX" wrote in message
ups.com...
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.?

:-))

On Feb 12, 10:44 pm, "Stefan Wolfe" wrote:
"KE5MBX" wrote in message

ups.com...

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.?

:-))

"Yes you can. Check the back of QST for a complete 3cm station. Cost
is
about $500 or so. "

:-)) :-))

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.?


You could,
http://www.advancedreceiver.com/page32.html


- Galen, W8LNA

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.?

Yes you can. Check the back of QST for a complete 3cm station. Cost is
about $500 or so.

Dave WD9BDZ