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Topics - DL1DBY

1
DMR Radio / DMR use in conflict situations
June 06, 2020, 09:25:47 am
Watching videos about global political conflicts, it seems that DMR radios are widely used by combatants, which is interesting.

In Syria the government forces uses Hytera radios, the Russian armed forces often use Baofeng RD-5R. I guess they use their own repeaters. The insurgents in Idlib province also prefer Hytera, though the government claims that NATO made encrypted communications equipment is also used.

In Venezuela the government forces use Baofeng DM-1801/GD-77, whereas the U.S. sponsored invaders recently preferred Motorola XRP3500, according to Venezuelan government sources.

So DMR radios should also be very useful in SHTF situations, especially in closed user groups with encryption (I have not used encryption so far, as it is illegal for Hams).

Best regards
Dieter
2
Digital Modes / A kind of WhatApp for HF
June 06, 2020, 08:36:37 am
As I agree with Gil, that having to haul around a notebook, a digital mode interface, the TRX and lots of battery power is very inconvenient in a SHTF situation, I have found something that could be attractive, if it works properly:

There is an Android app made by a russian ham called "HF Pager" or "КВ пейжер" that allows short messages like text or GPS positions (with WhatsApp like functionality like Goggle Maps support) using only an HF transceiver and a smartphone. According to one YouTube video it seems to be sufficient to hold the TRX microphone to the speaker of the smartphone and the smartphone micro to the TRX speaker, as the transmit tones are in the SSB audio channel range. It should also work on FM and even C4FM. The only downside is that the price of the app is somewhat steep with 10 Euros.

Nonetheless I like to experiment with it.

Here is a video on this topic (please excuse the bad quality and the horrible music in the video, it is not my video):

https://www.youtube.com/watch?v=biAKjvsxUMU&t=780s

Here is another video in which they use a specially made TRX for this app (though it will work with any TRX):

https://www.youtube.com/watch?v=Sji85hL2tuc

The last video is by RA3TLB who BTW has an excellent Youtube channel (I use autotranslate closed captions because my russian is too bad). Apart from Gil's and OH8STN's channels it is one of my favorite Ham Radio related channels.

Best regards
Dieter