What would it take to use ham radio over AT&T Tilt

[anmclark23]

The original question can be anwswered differently depending on interpretation of question....

1. How can ur xda transmit/receive over ham freqs? (must perform modifications to device and get FCC-ok, but legally possible)
2. How can ur xda observe and post through web host-repeater to chatbox, and can hambands be listened to on website over xda?

My tilt would not have javascripting and java plugins running would it? It doesn't seem to be able to support the Netherlands site post#3. I tried with both PIE and opera mini with TCPMP and Streaming Media Player.

[Rayan]

I think it would be easier if you just use HAM Radio over Internet (http://www.google.com/search?q=HAM+radio+over+the+internet&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-GB:official&client=firefox-a)... :)

[anmclark23]

1.)
power booster would be designed native to particular phone
designed for particular freq band
cradle or docking station for xda (charges with signal rx - antenna on top of car wired into cradle)

33cm band is old analog cell operating band. You might have interruptions sound like conversation(hi-freq noise w/multi-tones)
23cm band(1240-1300Mhz), 13cm 2350-2450Mhz(right in middle of celll phone authourization band - most of GSMs here)
GSM requires carrier-authorization (freq band) 900-928Mhz which is near cell phone range.

Microwaves may have skin heating effect. Questions of safety of being in close contact with xdas and cell phone towers known to cause cancer. Antennas in microwave range are extremely small. Could make collinear to give multiple gains. U could get pretty hi gain wi fi antenna in 900Mh~2 ghz range. Couplers(passive) could be used with antennas in cars

Many collinear high gain antennas would multiply 10000-20000x the power with a power amp. external antenna would give 20x-30x range. mounted atop vehicle or house would give far better line of sight both tx and rx. would easily recover loss from passive coupling on back side of radio. ctrl ops would have to provide very precise measurements on operation in freq and band. legal to do if authorized and operating in legal bands of FCC (here in usa...every country would have near equivalent comm regulators)


2.)
d-Star a protocol to internconnect cells into digital repeater systems. Ppl talk 100-150 miles apart with its usage. Transfer video, audio, or data. With packet radio u could transmit text thru pda entirely thru ham radio. It may go partially thru both ham and cell towers to hit say australia.

possible to use ham over ip software to find repaters' url and will be encapsulated as traffic.(ax.25 protocol used in amateur radio...internet affected by similar ix.25 protocol) GSM refers to type of modulation used to modulate signal. once it gets back to the inernet its born as packets of info ie voip graphic images ascii whatever (but no porn!)

links would be limited for instance if link transmitted at 300 baud it would take forever. but text for example ascii short and sweet would easily be transmitted in 12-15 modes psk 31, packet radio, paktor, amtor (amateur radio version of sitor), baudot. ascii is a recognized easily. all is encapsulated.

baudot is 5bit instead of 8bit. still used today in deaf phones with 5bit baudot code. makes it easy to use as a terminal into a ham radio. easy to talk to teletype operators over world. alot of times host will translate over internet with known repeater-ip address. connect to digipeater over ham(or cell?) and internet. Lots of mailbox like systems. almost like an email server.

FCC Answers legality
http://www.lamonica.com/legal.htm

Possible? ..little dated!
http://www.arrl.org/qst/2003/02/VoIP.pdf

Gateways
http://www.dxzone.com/catalog/Internet_and_Radio/Online_Receivers/ 54 different links!

forum specific to streaming media
http://icecast.imux.net/

Amateur Radio League of course!
http://www.arrl.org/

University of Twente, Neschede - The Netherlands
Site broadcasts three different meter wavelengths with chatbox.
http://websdr.ewi.utwente.nl:8901/

[khaytsus]

I just thought I'd say I'm a ham and I gave up on reading that drivel at about 3 lines in.

You could probably do speaker/mic to a radio and be an internet gateway that way, but all this other "cellular is near suchandsuch" stuff is silly, the Tilt itself would in no way ever be transmitting on ham frequencies.

[anmclark23]

Thank you for input, khaytsus. Cleared up first post(somewhat).

Would really like others to read more than 3 lines in...:(

Rayan, I have checked a couple of the links out. The tilt does not seam to support the java version or javascripting...will keep trying the others.

[kb0olf]

The simplest solution would be EchoLink. With the AT&T Tilt having the PTT button, I would love to have a WM port of EchoLink tied to the PTT. If I knew how to program, I would work on a WM port of EchoLink. Any programmers up to the challenge?

[KD8DNS]

Cq Cq Cq De Kd8dns.

Nice To See Some Hams Here.

[wa0zog]

The simplest solution would be EchoLink. With the AT&T Tilt having the PTT button, I would love to have a WM port of EchoLink tied to the PTT. If I knew how to program, I would work on a WM port of EchoLink. Any programmers up to the challenge?

Boy, I came in on this way late, and am resurrecting a dead thread...sorry about that.

Wish I were still doing programming, that would be a fun project, that's for sure. Got a couple of friends that are programmers, though, one with experience with PPC stuff...gives me some things to think about....

My thinking as far as VOIP around here was to simply use the wireless LAN in the house and something like Microsoft Portrait or Skype to pass the audio to my HF rig. My big problem is rig control since I use HRD for rig control and logging on a regular basis and I don't really want to change.

Anyone got any good ideas there?

As to some of the other stuff posted, I agree, the Tilt (or any handheld cell phone for that matter) certainly won't easily make it to the lower ham bands. Plus, you'd have a lot of work to do reprogramming it to make it to the upper bands. Is it possible? Maybe, but not worth the effort in my opinion. Provided all of this was done in the US, by US citizens, you wouldn't have to resubmit the device for FCC certification, as long as several conditions were met. First, you would have to be a licensed ham operator. Second, you couldn't sell it to anyone other than another ham operator for use at his station. And third, you'd have to verify that it fell within the spurious emissions guidelines that the FCC sets out for a device at that power level. I should remember what that is, but I've slept since I took the test. ;)

When it comes to getting an antenna connected to the phone, if you're talking about the Tilt itself, it has an antenna connector behind the rubber cover near the camera lens. Most phones have the same type of connector somewhere on them. Not all, but most. That also tends to remove most of the stray RF from the device itself and allows you to route the RF to an amplifier instead of having to use passive devices and increasing efficiency. BUT, you're still talking about retuning a device that wasn't originally designed for those frequencies in the first place. Interesting idea, though. Using that thought, the amplifier could be relatively universal and wouldn't have to be designed for a specific device.

As to many of the links, while they're relevant to a degree, many of them are online receivers. It's legal to broadcast received signals online, but not legal to rebroadcast signals over the ham bands. There's where the control operator mentioned in the first link comes into play. That's the whole issue of legality. There's no problem with listening, though. If you can stream the signals, you can listen all you want.

OK. I've not only resurrected a dead thread, but I've stirred the pot quite a bit. I'm curious to see what floats to the top!

--de WA0ZOG

[wc3sam]

ok why not use hrd and psk 31 and you should beable to do all functions but voice over radio and computer. just a thought 73s wc3sam

[woodchuck]

it'd be really neat to see an Echolink compatible client, and fantastic to tie it to the PTT!

As it is, I leave my HT running at home sometimes and have it streaming through my Windows Media 9 encoder at 8kbs, and it sounds awesome, with no breakup, even over GPRS. The downside is that I can't talk back, but at least I can keep tabs on our emergency nets, and I SMS in my check-ins to another HAM buddy live on the net, so he lets them know I'm listening. Downside #2 is that I can't surf the towers. I have to go home and change the tuning manually. I don't have a radio with a fancy PC interface for control. Just a thumbwheel tuned clunker I picked up at a field day. It does the job though.

I hope we have a good samaritan programmer that might take this project up. My Dad and I would love this app!

73's
KD4ZQE