Hi Ed
Somehow I feel as thought I have been left out of something. Pave Paws has been around a very very long time. 70cm use by Hams has like wise been there maybe longer. Living in the center of the country and not having to concern myself with the 70cm restriction to Ham use within a given distance of certain Military installations I have no idea what changed. Something changed. Do you know what that might be? The attention appears to be toward 70cm repeaters Was no one paying any attention to the 70cm restrictions when validating the 70 cm repeater installations? Are these repeater netted over the Internet? There is more that just PAVE PAWS to consider if my memory serves. Hams need the real truth about what caused the current problem. I do not , am not able to get that from all I have seen on the BB. Can you add anything Ed?
37 years in DOD testing makes me sensitive in many ways .
Thanks Ed
73's
Joe K0VTY
On Tue, 24 Apr 2007 06:48:20 -0800 Edward Cole kl7uw@acsalaska.net writes:
Tony, Roger, etal:
A "slice" will not be a solution to PAVE PAWS which is broadband covering the whole spectrum (420-450 MHz). There already exists restricted use of 70cm within range of selected military installations in FCC regs. Those unlucky to live within the affected areas cited will have no recourse but to restrict operations (however that takes effect). Voluntary negotiations may lead to some time slots of permission. Otherwise, we get "regulated" off the band.
Build satellites that require no more than 5w EIRP from the ground station may be the only answer. OR move to another uplink band. That's a possibility that may be the "hard news".
UN-Licensed users are more the long-term problem facing ham radio, than the military user...in my opinion. Ham radio has a long history of sharing allocations with the military. The short history of "part-15" and their "ilk" is not pretty.
So now its use it AND lose it...can't win! good luck to us?
73 Ed - KL7UW
At 05:23 AM 4/24/2007, Roger Kolakowski wrote:
Tony wondered:
"Should this ARRL msg. cause us to worry..."
Yes... The key is that in the US we are secondary users in the 420
- 450 mHz
band and while there are only 2 PAVE PAWS sites active, another
interesting
"land grab" can be found by googling wind shear radar and 449.000
mHz.
We are at the whim of the government with no primary allocation,
for example
there is this "grab" -- "Tire Pressure Monitoring System with
Frequency
Range of 433.92MHz."
An effort for Amateur primary allocation of even a "slice" would be
prudent.
Roger WA1KAT
----- Original Message ----- From: tjjapha@earthlink.net To: amsat-bb@amsat.org Sent: Tuesday, April 24, 2007 9:30 AM Subject: [amsat-bb] FW: ARLB013 ARRL aiding effort to mitigate repeaterinterference to military radars
Hi All, Should this ARRL msg. cause us to worry about the future of mode
B
operations? 73, Tony, N2UN
[Original Message] From: ARRL Web site memberlist@www.arrl.org To: tjjapha@earthlink.net Cc: <Subscribed ARRL Members:> Date: 4/24/2007 12:06:01 AM Subject: ARLB013 ARRL aiding effort to mitigate repeater
interference to
military radars
SB QST @ ARL $ARLB013 ARLB013 ARRL aiding effort to mitigate repeater interference
to
military radars
ZCZC AG13 QST de W1AW ARRL Bulletin 13 ARLB013 From ARRL Headquarters Newington CT April 23, 2007 To all radio amateurs
SB QST ARL ARLB013 ARLB013 ARRL aiding effort to mitigate repeater interference
to
military radars
The ARRL has been working with the US Department of Defense
to
develop a plan to mitigate alleged interference from 70 cm ham
radio
repeaters to military radar systems on both coasts. Citing an increasing number of interference complaints, the US Air Force
has
asked the FCC to order dozens of repeater systems to either
mitigate
interference to the ''PAVE PAWS'' radars in Massachusetts and California or shut down. Amateur Radio is secondary to
government
users from 420 to 450 MHz and must not interfere with primary
users.
The Commission has not yet responded. ARRL Regulatory
Information
Specialist Dan Henderson, N1ND, stresses that the Defense
Department
acknowledges Amateur Radio's value in disasters and
emergencies and
is being extremely cooperative, and a wholesale shutdown of US
70 cm
Amateur Radio activity is not in the offing.
''The ARRL Lab is working up calculations on each repeater
system the
Air Force has identified to determine where
interference-mitigation
techniques offer a reasonable chance of keeping the repeater
on the
air,'' Henderson says.
The situation affects 15 repeaters in the vicinity of Otis Air
Force
Base on Cape Cod, Massachusetts, and more than 100 repeaters
within
some 140 miles of Beale Air Force Base near Sacramento,
California.
A US Air Force contractor identified the problematic repeater systems last summer, but the situation didn't become critical
until
the Air Force contacted the FCC a month ago. ARRL officials
met with
Defense Department representatives in late March to discuss
alleged
interference to the PAVE PAWS radar sites. Henderson has
contacted
Amateur Radio frequency coordinators in both affected areas.
PAVE PAWS is a missile and satellite detection and tracking
system,
and its facilities occupy essentially the entire 70 cm band --
one
factor that makes mitigation difficult. As a ''first step,''
however,
the ARRL is recommending that all affected repeater owners
reduce
power -- possibly to as little as 5 W effective radiated
power
(ERP).
''We understand the difficulty this may cause to owners and
users,''
Henderson said, ''but the alternative to operating with a
smaller
coverage area may be not operating at all.''
Henderson says the League is still seeking further information
on
the problem. ''Until the Defense Department accepts a
mitigation
plan, repeater owners should exercise patience,'' he
cautioned.
Contact Dan Henderson, N1ND, n1nd@arrl.org, or 860-594-0236,
with
specific questions or issues associated with this situation. NNNN /EX
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73, Ed - KL7UW ====================================== BP40IQ 50-MHz - 10-GHz www.kl7uw.com 144-EME: FT-847, mgf-1801, 4x-xpol-20, 185w DUBUS Magazine USA Rep dubususa@hotmail.com ======================================
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