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Air Force Gives 10-Year-Old Orbiting Satellite To Ham Radio Operators (arrl.org)

Longtime Slashdot reader Bruce Perens writes: The U.S. Air Force has transferred control of a 10-year-old orbiting satellite to AMSAT, a ham radio organization, which has enabled it for any licensed ham to use on the air, as the satellite's Air Force missions have ended. Falconsat 3's first mission was science: measuring gravity gradient, spectrometry of the plasmasphere, electronic noise in the plasmasphere, and testing three-axis attitude control using microthrusters. Secondarily it was used to train Air Force Institute of Technology students in space operations, with close to 700 cadets obtaining ham licenses in order to operate a number of Air Force satellites using ham frequencies.

Now in its third mission, control of the satellite has been transferred to AMSAT, the Radio Amateur Satellite Corporation, and all government frequencies have been disabled with only ham ones remaining. The satellite will relay APRS (position and status reporting) signals, it will operate a BBS in the sky, and will broadcast telemetry.

74 comments

  1. FYI - not related to SpaceX by gman003 · · Score: 3, Informative

    The "FalconSAT" name certainly suggests a link to SpaceX's Falcon 9 rocket, but it is actually unrelated, predating SpaceX's founding. The satellite series has used a number of different lift vehicles - FalconSAT-3 used an Atlas V 401 rocket, as part of a multi-satellite launch.

    The closest the two Falcons came was the launch of FalconSAT-2, which got bumped from the Space Shuttle's manifest after Columbia. It got re-used as the payload on SpaceX's first-ever launch, the first Falcon 1 flight. Which failed catastrophically a half-minute in. The satellite apparently survived with "minor" damage, falling back onto the island, but it was never re-launched to my knowledge.

    The Air Force probably doesn't need FalconSAT-3 anymore because they have FalconSAT-5, which presumably can fill a similar purpose.

    1. Re:FYI - not related to SpaceX by Bruce+Perens · · Score: 1

      There is not currently any operating partnership between SpaceX and AMSAT. This might be more about AMSAT than SpaceX, though. I don't think they have satellites ready to go when an opportunity comes up. They generally get an opportunity years ahead and then build the satellite. I am peripherally involved with a geostationary satellite they are doing with FEMA.

    2. Re:FYI - not related to SpaceX by grumling · · Score: 1

      The Air Force Academy sports teams are the Falcons.

      http://www.goairforcefalcons.c...

      --
      "Well, good luck finding a judge that doesn't run a bestiality site."
    3. Re:FYI - not related to SpaceX by rickb928 · · Score: 1

      "The "FalconSAT" name certainly suggests a link to SpaceX's Falcon 9 rocket,"

      No it doesn't. The US Air Force Academy's athletic mascot and team name is the 'Falcons'.

      Does your history begin in 2002?

      --
      deleting the extra space after periods so i can stay relevant, yeah.
    4. Re:FYI - not related to SpaceX by gman003 · · Score: 1

      My history does not begin in 2002, but sports are not something I have any real knowledge of, particularly not collegiate-level sports. Even for the military academies. It's just never been my thing.

      The name similarity, combined with my vague recollection of a FalconSAT on one of the Falcon rocket launches, was enough that I went to check whether there was an actual link between them. I found that there was not, and learned a couple other fun facts, and thought that it would be nice of me to share that info with others.

  2. USAFA, not AFIT by Anonymous Coward · · Score: 1

    Falconsat 3 was built at the air force academy, not the AF institue of technology. '06 grad here. just google it -

    https://www.google.com/search?rlz=1C1GGRV_enUS750US750&{google:acceptedSuggestion}oq=falconsat+3&{google:instantFieldTrialGroupParameter}sourceid=chrome&ie=UTF-8&q=falconsat+3&pws=0

    1. Re:USAFA, not AFIT by Bruce+Perens · · Score: 1

      Did I say otherwise? It's been operated by AFIT people in recent time, but was built mainly by 3 hams and I accept that they were with Air Force Academy.

    2. Re:USAFA, not AFIT by Anonymous Coward · · Score: 0

      Well, you kind of conflated the two when you said that it was used to train AFIT students in space operations, but then you said that "close to 700 cadets" got ham licenses. USAFA students are cadets, AFIT students are officers (already have a bachelor degree and been commissioned).

      (Note that I'm not the '06 USAFA grad who commented above, but I was faculty at both schools.)

    3. Re:USAFA, not AFIT by Bruce+Perens · · Score: 1

      Grad students are often teachers. I suspect that's how AFIT and the Academy are together on this.

  3. Neat by Anonymous Coward · · Score: 0

    Neat

    1. Re:Neat by slashrio · · Score: 1

      I especially liked the sentence about the 'three-axis attitude control'.

      --
      "Trump!!", the new Godwin.
    2. Re:Neat by Big+Hairy+Ian · · Score: 1

      I Look forward to hearing what the Ham Radio guys do with it

      --

      Build a Man a Fire, and He'll Be Warm for a Day. Set a Man on Fire, and He'll Be Warm for the Rest of His Life.

  4. Why two separate bands? by Mal-2 · · Score: 1

    Can anyone explain why the uplink is in the 2m band while the downlink is in the 70 cm band? Having separate frequencies makes sense, but what purpose is there to having them this far apart?

    --
    How is the Riemann zeta function like Trump rallies? Both have an endless number of trivial zeros.
    1. Re:Why two separate bands? by Bruce+Perens · · Score: 4, Informative

      Receivers are de-sensitized by close-by transmitters on the same band. Having the uplink and downlink be in a separate band avoids this. Terrestrial repeaters use a big piece of RF plumbing to avoid this, which would increase the weight of the satellite.

    2. Re:Why two separate bands? by Anonymous Coward · · Score: 1

      The equipment that is required to allow receive and transmit to happen in the same band is extremely heavy. For example see this install for a repeater. I would imagine the satellite designers didn't want to include a hundred extra pounds of cans when they could just use two different bands and not worry about it.

    3. Re:Why two separate bands? by Mal-2 · · Score: 1

      Thanks for making it simple without being condescending. I don't stand a snowball's chance in hell of hitting this repeater, but I may at least attempt to listen for it.

      --
      How is the Riemann zeta function like Trump rallies? Both have an endless number of trivial zeros.
    4. Re:Why two separate bands? by Obfuscant · · Score: 3, Informative

      Having separate frequencies makes sense, but what purpose is there to having them this far apart?

      This is standard for satellite operations.

      There is one overriding technical goal in creating a working repeater. The receiver must not be swamped by the transmitter, which has a much stronger signal than anything it will hear from Earth. Earth-based repeaters (which this basically is) have physical isolation that is based on the wavelengths of the signals. A VHF duplexer, as it is called, is about 3 feet tall and 6 to 8 inches in diameter, and there are usually four or six used. The physical cavity allows for very sharp notches and passbands that are applied to both transmit and receive. The receive duplexers selectively pass the receive signal and notch the transmit. The transmit duplexers selectively pass the transmit signal and notch the receive. The antenna end of the duplexer chain (e.g. three in series from the transmitter, three in series to the receiver) is simply tee'd together. This setup works when the signals are 600kHz apart.

      You can build smaller duplexers, such as those used for ancient mobile telephone systems, or for some current repeater systems, but these require a minimum of 5MHz separation between transmit and receive, and support lower power transmitters. There is only 4 MHz in the entire amateur 2M band (2MHz in some countries), so this separation is not possible within that band.

      It is VERY easy to build an LC (coil/capacitor) duplexer for considerable amounts of power when the frequencies are 300 MHz apart. Like VHF (146MHz) and UHF (440MHZ). This can fit in a package smaller than a pack of cigarettes. And it is much lighter (pun intended).

      That's why amateur satellite operations use widely-split duplex. If it is UHF uplink and VHF down it is referred to as U/V mode, opposite is V/U mode (or vice versa. I don't do satellite ops.)

    5. Re:Why two separate bands? by Bruce+Perens · · Score: 4, Interesting

      You might be surprised. It only requires the Technician class license, which is no big deal to pass. A hand-held crossed 440/146 beam antenna will make it and costs less than $100, you don't really need an azimuth-elevation rotator. You learn how to point this by hand and wave it around until you hear the satellite. The required radio power would work with a walkie-talkie but a mobile/base radio is more likely to have the input and output that works with 9600 Baud modems. I am not clear whether a 9600 TNC works or whether you just use sound cards and a software modem.

      The voice birds require that handheld antenna and a dual-band walkie-talkie, and that's all.

    6. Re:Why two separate bands? by ArchieBunker · · Score: 1

      Satellites aren't that far up.

      --
      Only the State obtains its revenue by coercion. - Murray Rothbard
    7. Re:Why two separate bands? by Mal-2 · · Score: 1

      Well they're either That Far Up (geostationary), or they're moving. I'd actually prefer That Far Up, at least I'd always know where to aim.

      --
      How is the Riemann zeta function like Trump rallies? Both have an endless number of trivial zeros.
    8. Re:Why two separate bands? by Anonymous Coward · · Score: 0

      The satellite is in a 35.4 degree inclination orbit, which is bad news for anyone North or South of ~40 degrees Lat.

    9. Re:Why two separate bands? by Bruce+Perens · · Score: 1

      I have seen people do this by hand, it really doesn't look so bad. The satellite is always going to start at the horizon at a predicted time, and then cross over you. So, you can always start at the lowest elevation that is clear, and just do azimuth with a compass (remember declination).

    10. Re:Why two separate bands? by AsylumWraith · · Score: 1

      I'm guessing this is 9600 baud packet, which would require a PK-232 or similar TNC.

    11. Re:Why two separate bands? by DeQueue · · Score: 1

      HI Bruce

      Hardware TNCs, or software modems taking the signal from a soundcard from the radio's discriminator (NOT from the speaker) or software modems getting a signal from software defined radio (a $15 RTLSDR USB dongle for example) -- any will work for the satellite's 9600 baud signal.

      The satellite transmits what amateurs consider a "standard" 9600 baud packet radio signal -- G3RUH modulation, 9600 bits per second, bit scrambled, NRZI, HDLC with zero bit stuffing, AX.25 packets.

      Dequeue

    12. Re:Why two separate bands? by rickb928 · · Score: 1

      How hard would this be for a SDR/RaspPi combo? Seems doable, but I would need a month to study up for Tech license. At least no code, I couldn't copy 2 wpm today without a recorder... Naw, I would rather go QRP with all the cool new tech and old school technique. Or not.

      --
      deleting the extra space after periods so i can stay relevant, yeah.
    13. Re:Why two separate bands? by ipb · · Score: 1

      "I'm guessing this is 9600 baud packet, which would require a PK-232 or similar TNC."

      Hardware TNCs are old technology and are now far out performed by modern sound card based modems. I have a stack of them that will probably never see power again.

      Take a Raspberry Pi, a cheap USB sound card and run direwolf software and you have the basis of support for multiple low speed data modes.

    14. Re:Why two separate bands? by DeQueue · · Score: 1

      The original RaspPi probably has just enough CPU horsepower to demodulate the signal and compose the appropriate replies in order to use the onboard BBS in real time. The RaspPi3 has a better chance of working. I haven't tried it yet, but it's on the bottom of the "to do" list.

      The original RaspPi certainly has enough horsepower to record the signal during the pass (say, to an attached USB thumb drive), and then after the pass it can demodulate the 9600 baud data stream out of the recording. This is fine if all you wanted was the telemetry, since the telemetry isn't time sensitive. Be aware that SDR recordings tend to be huge.

      If you wanted to use the satellite as a digipeater for a scheduled digital QSO, then you could have all your messages prepared ahead of time and just send the appropriate message at the appropriate time (that is, right after you see the digipeated packets from the other station) in order to complete the QSO.

      See you on the birds!
      DeQueue

    15. Re:Why two separate bands? by Strider- · · Score: 1

      As I recall, the other primary reason why AMSAT typically uses this configuration is due to doppler. The frequency shift at VHF is only something like +/- 15kHz, which is usually within the capture window of a VHF receiver, whereas at UHF it's +/- 45 kHz, which is beyond your typical receiver. Since we can retune our earth based receivers on the fly, the whole thing works.

      --
      ...si hoc legere nimium eruditionis habes...
  5. live Packet only by Anonymous Coward · · Score: 0

    Looks like falconsat-3 is for live packet QSO's only. No voice, no store and forward.

    1. Re:live Packet only by Bruce+Perens · · Score: 1

      AMSAT on the bottom of this page specifies 3 programs as "Software for operating via the Packet BBS". But I see that at the moment it is open for live QSOs but not automated ones.

  6. Re:Put Sarah Huckabee Sanders in it. by Anonymous Coward · · Score: 1

    Deep breath.. No need to make this political... yet...

  7. Surely only Transceiver Control by Anonymous Coward · · Score: 0

    I wouldn't think Orbital Control has been handed over as well.

    1. Re:Surely only Transceiver Control by Bruce+Perens · · Score: 1

      AMSAT does handle orbit control for its own satellites, but in general no ham radio satellite is designed to de-orbit or to require periodic orbit maintenance. Rather, they are designed to operate with indefinite lifetimes in slowly-decaying orbits, and AO-7 has operated, with interruptions, for 43 years. Most Amateur satellites are passively stabilized, and magnetic stabilization systems have been used often.

    2. Re:Surely only Transceiver Control by sizzzzlerz · · Score: 1

      Since the AF disabled the S band and other transponders, one of which was probably for command and control, the capability of controlling it, if there was any way at all, is gone. After 10 years, I doubt that there is much in the way of orbital maneuvering that can be done, in any case. For small sats like this, they may have had a small amount of gas initially in order to place the thing into the proper orbit after launch but that probably ran out years ago. I'd suspect that the bird is fixed in its orbit and will only change if the orbit begins to decay and it eventually re-enters the atmosphere and burns up. Not much can be done about that.

    3. Re:Surely only Transceiver Control by Bruce+Perens · · Score: 1

      The real requirement was that the satellite not transmit on those frequencies. There isn't any problem with receiving. A satellite with this size and cost is often built without ROM, simply because of the cost of space-qualified ROM which must be rad-hard for decades of operation. It loads its computer program into RAM using a completely hardware implementation driven by ground control with the CPU reset line asserted for the whole time. Once the program is loaded, the CPU is allowed to start. The CPU may be horribly antique by today's standards due to the need for silicon-on-sapphire for rad-hardness. Satellites of that age could even be using the 1802, as that was one of the few CPUs we could get in silicon-on-sapphire and AMSAT-DL (Germany) wrote an embedded OS for it.

      So, the big switch from Air Force operation was likely a reload of the software, and AMSAT is probably now in control of that software. It is likely that the satellite can be reloaded from multiple frequencies, and the "encryption" used to do that is rudimentary. A computer system designed this way is harder to kill than one that requires the CPU to load a program.

    4. Re:Surely only Transceiver Control by phantomfive · · Score: 1

      It loads its computer program into RAM using a completely hardware implementation driven by ground control with the CPU reset line asserted for the whole time. Once the program is loaded, the CPU is allowed to start.

      I'm not sure what you mean here, but it sounds really cool. Could you clarify? Plz? :)

      --
      "First they came for the slanderers and i said nothing."
    5. Re:Surely only Transceiver Control by Bruce+Perens · · Score: 1

      These are probably better than my explanation. A German space scientist, Karl Meinzer, designed this all in the 1970's and it's still being built into satellites.

    6. Re:Surely only Transceiver Control by Bruce+Perens · · Score: 1

      It looks like the FOX series of low-earth-orbit cubesats are using STM32 and GNU C. Here's a slide show. Because these don't traverse the van Allen belt, they don't have to be as rad-hard as higher-orbit satellites.

    7. Re:Surely only Transceiver Control by rickb928 · · Score: 1

      The 1802 was pretty popular CPU for military use in the 70s-80s. Not just for space use. God, I remember that, wow.

      --
      deleting the extra space after periods so i can stay relevant, yeah.
    8. Re:Surely only Transceiver Control by Strider- · · Score: 1

      A satellite with this size and cost is often built without ROM, simply because of the cost of space-qualified ROM which must be rad-hard for decades of operation.

      I thought it was the other way around? A PROM, and especially a mask ROM is an incredibly simple device, effectively just a single diode between a given row and column on the die. Not counting the address decoder (which you would have in both RAM and ROM), a ROM chip only has a single PN junction per bit. An SRAM cell has 6 transistors per bit, and DRAM is a capacitor plus a transistor (not to mention the required refreshing).

      I'd love to be shown the error of my ways, but I would have thought the KISS principle would hold.

      --
      ...si hoc legere nimium eruditionis habes...
  8. Slashdotted by Bruce+Perens · · Score: 2

    I broke the ARRL web site :-). Try the AMSAT site instead.

    - K6BP

    1. Re:Slashdotted by Anonymous Coward · · Score: 0

      Thanks Cousin Brucie. You're doing your damnedest to save Slashdot, among other things, even if few else cares about such matters these days. That's the old Elmer Spirit!
      This topic has elicited some First-Class Radiotelephone responses, some of which...most of which...go over my head. Go way way over my head, right this very now. But that is rather the point, isn't it?

      Ham Radio has moved on, from my time of putting together an EICO 753, and trying to deal with its atrocious tendency to drift, while the Beam-Power Output Tubes were trying to melt the very Glass which within they were enveloped. (I then went QRP with a Ten-Tec Powermite, whose 40763 MOSFET Front End would blow out with a sneeze. Good Times!)

      For those in the cheap seats, Ham Radio led to my later involvement with Plasma Physics, especially High-Charge State Heavy-Ion Physics. To tickle our ECRIS, we used surplus Varian Nike Radar Transmitters. Better us than the Scrap Metal Dealers. It turns out that making the seemingly impossible Helium Hydride is actually quite simple. (It only takes a specific Magnetic Field Profile and few watts at 8.6GHz.)

      Ex-WB6VXS here.
      Very Ex.
      (WB6VXS was a Radio Club; I was the Trustee for the last couple of years until even I lost interest. Because Girls.)

      Oh, am I the only one who can't see the Captcha unless opening the invisible image in a new window? This Captcha reads: discrete.
      Since Slashdot finally came back up, things have gone Bump City with certain features.

  9. 700 more hams by Anonymous Coward · · Score: 0

    close to 700 cadets obtaining ham licenses in order to operate a number of Air Force satellites using ham frequencies.

    That seems like a nice thing. Given how even today in large scale natural disasters ham operators provide critical communication links to the outside world, having 700 more licensed operators can only be a good thing.

  10. Strange use of hyphens... by Anonymous Coward · · Score: 1

    Not sure whether to be more concerned at the fact that there is a 10-year-old locked in orbit around a satellite, or that control of said youngster is being transferred to a ham radio organization.

    Strange...

    1. Re:Strange use of hyphens... by Anonymous Coward · · Score: 0

      Don't be daft. The Air Force is giving the orbiting satellite to a 10-year-old so that he can "ham" radio operators. Those radio operators are in need of a good hamming, after what they did to that poor 10-year-old.

  11. Related to Hurricane Maria? by Actually,+I+do+RTFA · · Score: 1

    I wonder if this was accelerated because of the need for HAM operators in Puerto Rico following Maria.

    --
    Your ad here. Ask me how!
    1. Re:Related to Hurricane Maria? by Bruce+Perens · · Score: 1

      I don't think so. Red Cross asked for people who had experience with digital modems over HF radio, and VHF digital for shorter range. The satellite is usable, and we are indeed building a satellite that is geosynchronous (not geostationary) and designed for emergency communications, but satellite is probably not a major part of that operation.

    2. Re:Related to Hurricane Maria? by Anonymous Coward · · Score: 0

      Not geostationary. These types of sattelites are more of a novelty for hobbyists. Simply put, its orbit makes it useful easily once ever 1-3 days from a given location. Its faster then snailmail, but not by all that much.

    3. Re:Related to Hurricane Maria? by rickb928 · · Score: 1

      "useful easily once ever 1-3 days from a given location."

      Which is still very useful for noncritical communications following a disaster.

      --
      deleting the extra space after periods so i can stay relevant, yeah.
  12. Great by AndyKron · · Score: 1

    Great, they get a beat up trainer. Seriously though, I'll bet a lot of those cadets go on to train for volunteer emergency communications later on.

    1. Re:Great by rickb928 · · Score: 1

      " lot of those cadets go on to train for volunteer emergency communications later on."

      A lot of those cadets, when deployed, will be engaging in emergency communications daily as part of their mission. They are almost over trained for volunteer emergency communications. Almost.

      --
      deleting the extra space after periods so i can stay relevant, yeah.
  13. HAM/CB mobile device?? by Anonymous Coward · · Score: 0

    hi I was thinking of getting some HAM gear, yeah been lazy.

    anyway does anyone make a handheld device that does HAM, and CB?

    thanks for reply in advance.

    d

    1. Re: HAM/CB mobile device?? by Anonymous Coward · · Score: 0

      Look into SDR

  14. Re:HAM/CB mobile device?? by Bruce+Perens · · Score: 1

    If you would like to be a ham, go to this page and fill out the form. The folks at ARRL will send you information on becoming a ham. Also, read this part on getting licensed.

    There is a lot more to it than CB, and a lot of the stuff you hear on CB shouldn't ever be done on ham radio. And ham radio is not a gift. Expect to do some work to become a ham.

  15. Re:HAM/CB mobile device?? by Lije+Baley · · Score: 1

    3840 kHz will sure get him a mix of ham and CB.

    --
    Strange things are afoot at the Circle-K.
  16. Re:HAM/CB mobile device?? by AsylumWraith · · Score: 1

    There's no such device, at least not in the US. Under FCC rules a radio for use on CB (11-meter band,) has to be type certified and channelized. Ham radios operate all across the amateur spectrum, (160-meters through 10-meters on HF, 6-meters through 2-meters on VHF, etc.) and require no type certification. Since a legal CB radio must only operate on CB channels, and a ham radio lacks type certification, the two services are mutually exclusive, as far as equipment is concerned. The one exception is that every HF ham radio I've seen can receive on the CB channels, but will in turn refuse to transmit, (so as to remain legal.)

    I'd recommend getting your amateur license. The technician's, (or even general,) exam is easy, it's a lot of fun, and it gives you a chance to give back to the community in the form of supporting emergency communications, if that's of interest to you.

  17. Ham Radio? by cyber-vandal · · Score: 1

    Is that something William Shatner is involved in?

  18. Re:HAM/CB mobile device?? by sharkbiter · · Score: 1

    >the two services are mutually exclusive, as far as equipment is concerned.

    And usually Hams wouldn't touch a CB rig with a 1000000000000000000 foot pole.

    "If you ask me that ain't no rose, roll up your windows and hold your nose." Leyton Wainwright III

  19. Re:HAM/CB mobile device?? by Bruce+Perens · · Score: 1

    New amateur receivers are type-certified for avoidance of the old 800 MHz analog cellular frequencies, as required by the Electronic Communications and Privacy Act in 1986. So, you will see a notice about radios not being offered for sale until they are type-certified.

    I would like someone to help work on repealing that provision of ECPA. Obviously everyone uses encryption now.

  20. How is that 10 year old still alive? by Hidyman · · Score: 1

    Which satellite are they orbiting?

    --
    You can't take the sky from me ...
    1. Re:How is that 10 year old still alive? by eclectro · · Score: 1

      Without knowing about the specific design, a good guess would be one of two things (perhaps both). This satt is obviously a low power device with a 1 watt transmitter. So its battery requirements are not large. So they could have packed extra batteries that they could switch out every so often as one went bad. Another thing that they might could do is operate just when the sun is available, like what trustworthy Oscar 7 is doing now.

      --
      Take the cheese to sickbay, the doctor should see it as soon as possible - B'Elanna Torres, "Learning Curve"
    2. Re:How is that 10 year old still alive? by Bruce+Perens · · Score: 1

      Nickel-hydrogen batteries in satellites can last 40,000 cycles.

      How has my Prius lasted for 10 years on the same battery pack? Because the software never discharges the battery below 20% or charges it above 80%.

      Good charge management software is one thing. Also, the satellite can be designed to work in sunlight with an open or shorted battery, which is how AO-7 is still working after 43 years. AMSAT's experience in space has taught them a lot about battery failure.

  21. In order to quailify as a BBS... by KingRatMass · · Score: 1
    Will it run TradeWars???

    In order to qualify as a legit BBS, it has to have TW2002...

    1. Re:In order to quailify as a BBS... by sabbede · · Score: 1

      Can I download the shareware version of Commander Keen: Goodbye Galaxy?

  22. Hey thanks by eclectro · · Score: 1

    Thanks for posting this up Bruce, it's a wonderful story.

    --
    Take the cheese to sickbay, the doctor should see it as soon as possible - B'Elanna Torres, "Learning Curve"
    1. Re:Hey thanks by HBI · · Score: 1

      I agree. This is a nice story, more interesting than 99% of what is seen here nowadays.

      --
      HBI's Law: Frequency of calling others Nazis is directly correlated with the likelihood of the accuser being Communist.
  23. Re:HAM/CB mobile device?? by EmagGeek · · Score: 1

    There is still no requirement that amateur transceivers must be type certified for use in the Amateur Service. An Amateur radio operator can build their own radio and use it all they want, provided they adhere to emissions standards. But, they do not have to obtain type certification to use their radio.

  24. Re:HAM/CB mobile device?? by Strider- · · Score: 1

    However in order to be sold in the USA, they must comply with the law that forbids reception on the old AMPS bands. Of course, this is usually just a pinkyswear on the part of the manufacturers, and can be unlocked either through accessing a calibration mode, or by snipping a diode/resistor on the main circuit board.

    --
    ...si hoc legere nimium eruditionis habes...
  25. Re:HAM/CB mobile device?? by Bruce+Perens · · Score: 1

    You can build one, but you can't sell a VHF/UHF transceiver that is not type approved, because all receivers in VHF/UHF bands are considered to be scanners, and thus must be type approved. It's not in Part 97 but elsewhere in FCC regulations.

  26. Re:HAM/CB mobile device?? by Anonymous Coward · · Score: 0

    Yes, you absolutely can. Amateur radios with self-contained transmitters absolutely do NOT require type acceptance to be imported or sold in the United States. This is why it is legal to use any radio in the Amateur Service (including former commercial batwing stuff) - because there is no such thing as Part 97 type acceptance. All radios are acceptable for use in the Amateur Service.

    What you might be referring to is an equipment authorization under Part 2, which is not a type acceptance. A lot of people with little knowledge of regulatory laws make this same mistake, so it's certainly forgivable.

  27. Re:HAM/CB mobile device?? by Bruce+Perens · · Score: 1

    The point is that you can't sell the radio without FCC approval. This concerns me because I am producing an SDR radio that is supposed to be 100% Open Source, but in order to sell it as anything but test equipment, I need to have one little non-Open-Source part that keeps the receiver from being programmed to receive AMPS cellular.

  28. Re:HAM/CB mobile device?? by Anonymous Coward · · Score: 0

    If you are going to make a point, you should make it accurately. If you don't know what you are talking about, you should research the issue BEFORE you make foolish statements and not after.