|
New to Ham Radio?
My Profile
Community
Articles
Forums
News
Reviews
Friends Remembered
Speak Out
Strays
Survey Question
Operating
Contesting
DX Cluster Spots
Propagation
Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers
Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net
|
Phase 3D - An Opportunity
Dick Boley (N3HKN)
on
December 8, 2000
View comments about this article!
With the demise of AO-13 many satellite operators moved to other areas of interest. With 3D we can anticipate their return plus hundreds, or thousands, of others entering this highly interesting area. The availability of microwave frequencies that cross international boundaries will spawn a new set of initially homebrewed or converted equipment, followed by commercial items.
Experiments with PSK31, Spread Spectrum, SSTV, Hi-speed Packet, TCP-IP, etc. will occur BECAUSE of the ability of a MUCH LARGER community of interested hams who can concurrently participate. No longer is wide band hi-speed microwave based packet reserved for a few people who have to live within 20 miles of each other on hilltops. ANYONE with an interest in this, and other functions, can probably find like minded people to work with in the development of advanced systems. With small microwave stations DXpeditions can go almost anywhere to offer rare countries on 10ghz! Condo and restricted covenant Hams can whip up a small helical antenna with PVC pipe and talk around the world. APRS on L-Band can show where hams are around the world with very little spectrum usage. The list goes on.....
The chiding by the FCC to move on or loose it will be seen as a challenge that can not only be accepted, but will now successfully serve to protect our frequencies.
This article has expired. No more comments may be added.
|
Phase 3D - An Opportunity
|
|
|
by VE3TMB on December 8, 2000
|
Mail this to a friend!
|
I share the optimism over Phase 3D and feel it will either revive or redefine amateur radio.
One of the key problem areas for many of today’s amateurs is the inability to operate HF due to antenna restrictions. For these amateurs, DX contacts become a hit and miss prospect to the extreme. At the very least, this issue will be addressed by Phase 3D – and that’s just the beginning. In addition to the small antennas, think of how low (or nonexistent) the noise level is on those microwave bands.
The power, flexibility and capacity of the bird is incomparable! Apparently the voice capacity of Phase 3D is equal to all HF bands combined – pretty impressive when you think of how variable the HF bands are due to solar cycle, time of day etc. The DSP technology on Phase 3D will be a platform for evolutionary applications – innovation as we go !!!
In addition to Phase 3D, there are other exciting things happening that are helping reposition ham radio in an Internet dominated world. APRS is a fascinating, useful application allowing hams to enjoy a service that commercial wireless networks are not yet ready to offer. The creativity behind the ongoing development of APRS never ceases to impress me. Rumor has it that by late next summer we’ll have a dedicated APRS satellite for coverage in remote areas outside of the current terrestrial network on 144.39 MHz.
Then there’s the BeacoNet Project where we can participate in tracking 6 meter and 2 meter openings be it troposheric, E-Layer, or meteor scatter.
Oh ya, the International Space Station will open even more doors.
While I hope the traditional HF activity remains high, I can’t help but think that our real future is in exciting new applications beyond the F1 and F2 layers.
|
|   |
|
Phase 3D - An Opportunity
|
|
|
by WN3VAW on December 8, 2000
|
Mail this to a friend!
|
I'm also eagerly awaiting the AO-40 opportunities! This is the long-overdue (due to no fault of AMSAT) next step on the way to several SHF/EHF geo-synchronus satellites that could give us global 24x7 coverage.
|
|   |
|
Phase 3D - An Opportunity
|
|
|
by W5UX on December 8, 2000
|
Mail this to a friend!
|
|
So that's why I have not heard RS-13 for a while.
|
|   |
|
RE: Phase 3D - An Opportunity
|
|
|
by K0RS on December 9, 2000
|
Mail this to a friend!
|
|
Although AO-40 has justifiably stolen the limelight, RS-13 is alive and well in mode T. The transponder works fine and the beacon is loud and clear on 145.862 +/- doppler. The uplink passband is 21.260 to 21.300 mHz and the downlink is 145.860 to 145.900. Break out your tracking software and sharpen up those satellite skills pending full availability of AO-40. RS-13 is begging for activity, and simple antennas work fine.
|
|   |
|
RE: Phase 3D - An Opportunity
|
|
|
by KB9VJS on December 10, 2000
|
Mail this to a friend!
|
I have a 2m/70cm dualband hand-held radio. It will put out 2-5W depending on the power setting. I am looking for a rough idea of what other equipment I will need to be able to operate via AO-40. I am sure I wll need a beam, such as one of the Arrow antennas. Will I also need an amplifier?
|
|   |
|
RE: Phase 3D - An Opportunity
|
|
|
by N3HKN on December 11, 2000
|
Mail this to a friend!
|
I receive the 2M beacon at S4 FT-847 with RF amp on using attic J-POle. An HT may work under ideal conditions. However, those conditions include not too many hams running hi-power to insure their individual success at the expense of others. If they do, then the fixed power output of the transponder would be used up by the stronger signals. I believe, and hope, that there was some logic applied to AO-40 to reduce this power hogging such as floating notch filters based upon the strength of individual carriers, and other techniques. Given that they are there, and they work, you should be ok. However, several thousand other hams will also be "ok". This is why I intend to stay away from the inevitable overload and go for 435 up and 2.4ghz down for starters.
Dick N3HKN
PS: Go the the French AMSAT site and download their DSP based telemetry program. Works great but tuning is a bit touchy.
|
|   |
|
Email Subscription
You are not subscribed to discussions on this article.
Subscribe!
My Subscriptions
Subscriptions Help
Other Space Articles
LEOs: Easy to Use?
AO40 Operation Easier Than You Think
Thank You Colonel Susan Helms!
Save Iridium & Use for Amateur Radio
Ham Radio on the Space Station
|
|
|