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Old 17-02-2015, 18:09   #46
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Re: Icom M-802 Instr Videos(basic-adv) & LIVE DSC-Distress Call

Those that wish Parts 1 and 2 combined....but with a little lower resolution...

Live Demonstration of HF-DSC "Test", "Routine", and "Safety" Calls to USCG and WLO, etc.
(this is parts #1 and #2 combined together using youtube edit, but the resolution is a bit lower....which might be good for those of you on bandwidth limited internet...)


Fair winds...

John, KA4WJA
s/v Annie Laurie, WDB6927
MMSI# 366933110


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Old 18-02-2015, 05:11   #47
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Re: Icom M-802 Instr Videos(basic-adv) & LIVE DSC-Distress Call

I created a few Youtube Playlists that might make finding / watching the videos that you desire to be a bit easier...


Maritime HF Communications ("HF-SSB")

https://www.youtube.com/playlist?list=PLnN6ygtZ3h2nPNdApNsZDo_Jk3NB_Bt1y

(which currently consists of 13 videos, showing/discussing: radiowave propagation and channel/freq choice; atmospheric and man-made noises; radio-telephone calls; Distress Signaling; explanations/demonstrations of HF-DSC calling; etc. etc.)



Icom M-802 Instruction Videos

https://www.youtube.com/playlist?list=PLnN6ygtZ3h2npivDjoFrC-8QKVyMb4tVr

(which currently consists of 15 videos, showing/discussing: basic and advanced Icom M-802 instructions, use, and programming;......along with radiowave propagation and channel/freq choice; atmospheric and man-made noises; radio-telephone calls; Distress Signaling; explanations/demonstrations of HF-DSC calling; etc. etc.)



HF-DSC Communications

https://www.youtube.com/playlist?list=PLnN6ygtZ3h2n3z5nlv-ga2zYuPozhUXZX

(which currently consists of 8 videos showing/demonstrating the features and capabilities of HF-DSC signaling, as well as detailed explanation of what DSC is, how it works, and why/how you should use it...)


[I will add/update videos in these playlists as needed / when input is received....]

I hope this helps...

Fair winds...

John, KA4WJA
s/v Annie Laurie, WDB6927
MMSI# 366933110
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Old 19-02-2015, 12:07   #48
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Re: Icom M-802 Instr Videos(basic-adv) & LIVE DSC-Distress Call

You all may wish to have another look at the above "Playlists", as I have added more videos!

And, have also finally uploaded my Offshore Weather videos into their own playlist...

Offshore Weather....procedures, sources and applications

https://www.youtube.com/playlist?list=PLnN6ygtZ3h2mPZAx2vWzdjTJjHlChruyY

(which currently consists of 7 videos explaining and showing/demonstrating, exactly what weather sources are easily available to sailors/cruisers when at sea or in remote locales, showing/demonstrating both SSB Voice Weather Forecasts and WeFax Charts, worldwide....)


Fair winds...

John, KA4WJA
s/v Annie Laurie, WDB6927
MMSI# 366933110


P.S. Also have my offshore sailing videos posted...
https://www.youtube.com/playlist?lis...KgTCj15iyl6qoY
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Old 07-05-2017, 00:54   #49
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Re: Icom M-802 Instr Videos(basic-adv) & LIVE DSC-Distress Call

Great effort, ka4wja!

I have used HF many times as a pilot, but not yet on a vessel.

There is an IC-M802 installed on my Catamaran, and I can tune radio stations no problem. It is connected to an AT-140, but only some channels seem to tune when I press the THRU TUNE button.

I just wanted to see if I could get a NAVTEX signal out, and tried 518.0 KHz. When the time slot was up (Hong Kong), I didn't hear a thing. I tried FSK and USB (with 516.0) and LSB (with 520.0) - nothing received.

All I wanted to at the moment was trying to receive NAVTEX via an app on the phone.
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Old 08-05-2017, 08:37   #50
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Re: Icom M-802 Instr Videos(basic-adv) & LIVE DSC-Distress Call

DITB,
For questions on specific problems with your radio and/or reception, it is much better to start a new thread (with a subject asking the main question or explaining the problem)....
But until then, here are some brief recommendations / possible solutions...


1) I have no idea (and possibly neither do you?) whether your M-802 was ever working / installed properly....but let's assume that it is/was....


2) The AT-140 is a good tuner, but it does have a few peculiarities...
Sometimes / in some conditions / depending on antenna length / depending on the RF Antenna Ground system, it can attempt a "tune", but not actually get a correct tune/match...
Sometimes, pressing the TUNE button again will get a good tune/match, but sometimes you should try changing the transmit freq by about 100khz or so, press TUNE again, and try to obtain a tune/match (this should work)...and then return to your channel/freq of choice, and you should be fine and/or press TUNE there as well, and should be fine...

If none of the above works, then you should start a new thread here with as much info on your radio (serial number, install date, whether you have personally seen it work on all bands/freqs in the past, and if so has anything changed since then, etc. etc.), your antenna (rope-tenna, whip, etc.), your RF ground / Antenna Ground, how/where the radio gets its 12vdc power (directly from the main house bank, I assume?), where are you coaxial and tuner control wiring run, do you have a "line isolator" on the coaxial line (at the AT-140 end), how many and where are your ferrites installed, etc. etc. etc. what channels / freqs work fine and which ones don't, is this consistent or intermittent (fyi, intermittent problems can be a pin to find/solve, but many are caused by RFI, which is why "line isolators" and ferrites are so important)..
With this info, and as much more as you can tell us, we should be able to help...


3) Most playing around with NAVTEX reception (on-shore) will use 516.3khz USB (or 516.1khz) and 1700hz (or 1900hz) as their "center freq", when using SSB and a computer sound-card to receive NAVTEX....
When tuning it at the correct time, you should hear the tones loud and clear! (if not, there is a problem)
But, your exact settings all depends on your set-up (????) and software (????)....and you should follow the instructions that you have from the software and hardware suppliers, not mine...
I have no idea what App you have, nor how they work....so you should look at the App's instructions...
{fyi, most on-board will use a NAVTEX receiver designed for this purpose....never heard of anyone on-board using their phone for this....just seems counter-productive, as it defeats the entire purpose/design of the NAVTEX system (simple/reliable/automatic/, etc.)}

4) I haven't been in Hong Kong in almost 20 years (2 weeks in June 1997, for UK/Sino hand-over), but according to the info I have:
Hong Kong NAVTEX on 518khz (in English) is on schedule "L"...
Character B1 is "L", and the transmit schedule is:
0150z, 0550z, 0950z, 1350z, 1750z, 2150z...(that's "z"/UTC/GMT)
(not sure they use their entire 10 minute time slot, so you will need to make sure you're in front of the radio at those times...and this is why I don't know of anyone on-board a boat that uses their radio to receive NAVTEX....everyone I know uses a NAVTEX receiver on-board, as it is automatic and saves the forecasts for you, automatically...)




5) BTW, in addition to the "M-802 Videos", here are some that should help...


HF-DSC Communications
https://www.youtube.com/playlist?lis...ga2zYuPozhUXZX




Offshore Weather
https://www.youtube.com/playlist?lis...zdjTJjHlChruyY




Maritime HF Communications (in general)
https://www.youtube.com/playlist?lis...ZDo_Jk3NB_Bt1y






And, of course, the Icom M-802 Instruction Video Playlist
https://www.youtube.com/playlist?lis...rC-8QKVyMb4tVr




Hope this helps???

Fair winds...

John
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