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Messages - gil

Pages: [1] 2 3 ... 191
1
https://cointelegraph.com/news/developer-completes-proof-of-life-off-grid-crypto-transaction-primed-for-post-apocalypse

Cryptocurrency and blockchain meet amateur radio. Not quite sure what to think of this one. I am always worried about the increasing level of complexity in disaster radio. It is nevertheless interesting to see new experiments involving radio.

Gil.

2
Military Radios / Re: PRC-320 Military Manpack Radio, First Impressions.
« on: September 15, 2018, 03:11:38 PM »
Very interesting thanks. I didn't know about the man other than from his book.

Gil.

3
Military Radios / Re: PRC-320 Military Manpack Radio, First Impressions.
« on: September 14, 2018, 12:22:01 PM »
Interesting thoughts, and I agree as well. For me, military radios are more on the hobby side than for prepping, but their ruggedness makes them a great choice for those situations when transporting them alone on foot isn't required. They are fairly cheap and will survive almost anything. Now, I would rather also have three or four (I have many more) $50-$100 radios than one or two $800 radios... It is also easier to scavenge parts for through-hole radios than surface-mount circuits. If one of my military radios craps out, no big deal, I have more... Sure, I'm not going to carry them all in a bug-out scenario, but they can be very handy.

I am reading a book by F. Spencer Chapman, "The Jungle is Neutral" (highly recommended), where enormous radio sets are carried by men on their back in the Malayan jungle and powered by pedal-driven dymanos... A PRC-320 compared to that is a pocket radio! These guys had virtually no support from the outside... So, all is relative... A group of determined men can accomplish miracles. Sure, we have better options today, and that even is debatable, but my PRC-320 with a hand-crank attachment can be a lifesaver.

Best solution? Have both, use what is most convenient or possible for the given circumstances...

Gil.

4
Military Radios / Re: PRC-320 Military Manpack Radio, First Impressions.
« on: September 13, 2018, 01:51:46 PM »
I agree about everything you mentioned, except that I consider the 320 to be one of the easiest radio to use that I ever laid my hands on...

Gil.

5
Antennas / Re: Best Antenna for MTB3
« on: September 05, 2018, 05:28:30 AM »
Hello,

Yes, the difference is the size. The 240-43 is a bit more efficient but much bigger. I use the 140-size. No tuner needed on 40/20m, maybe on 30.

For my MTR is use this to check SWR:

https://qrpguys.com/tuning-indicator

If the LED is not full-bright, you're ok.

Gil.

6
Antennas / Re: Best Antenna for MTB3
« on: September 04, 2018, 01:07:44 PM »
Hello Guillermo, and welcome  :)

Get an FT-140-43 toroid core and a 100pf 3000V capacitor, some 1mm enameled magnet wire...
Use a 67ft antenna wire.

Then see the photos below:





The box above is a Hammond 1594B.

Gil.

7
Morse Code / Re: Can Morse Code Still Save You?
« on: September 03, 2018, 06:29:49 PM »
Thanks Ray. If only a handful of people pick up Morse from reading it, that would be great.
Gil

Sent from my SM-G928F using Tapatalk


8
Batteries & Solar / Re: Show us your Solar Power System.
« on: September 03, 2018, 07:30:25 AM »
Man does that K2 look good! LOL.
Gil.

9
Morse Code / Re: Learn How To Increase Your Morse Code Copy Speed.
« on: August 31, 2018, 05:38:35 AM »
Good one Sparks, thanks.
Gil.

10
Morse Code / Re: Learn How To Increase Your Morse Code Copy Speed.
« on: August 28, 2018, 04:34:52 AM »
Excellent Chris, just keep doing it, it does take a long time...

Gil.

11
Morse Code / Re: Can Morse Code Still Save You?
« on: August 27, 2018, 05:27:00 PM »

12
Military Radios / Re: Czech Military RF-10 Radio.
« on: August 25, 2018, 08:58:01 AM »
Let us know!

Gil

Sent from my SM-G928F using Tapatalk


13
CB / Re: CB as a SHTF option, in my opinion
« on: August 20, 2018, 06:28:01 AM »
Definitely a good band for local communications. Looking back at my CB days, the one thing I lacked the most back then was a good understanding of antennas. I had no idea about the different kinds of antennas I could have used to extend range, beams, Moxon, wire antennas, etc. The standard was the quarter-wave vertical with radials, or the 5/8 like the excellent Solarcon Imax 2000. Mobile antennas ranged from the very good to ridiculous.

Bottom line is, had I studied antennas, I could have gotten much more from CB. That would be my best advise to CBers, study and try many types of antennas!

Gil.

14
Technical Corner / Re: Armored BitX40.
« on: August 09, 2018, 09:27:56 AM »
Back to work!

Actually, thanks to ELK here, Stan, this project just might see the light of day.

Stan is working on the Arduino code to drive the DDS, the Si5351A, to output from 4750 to 5250kHz, which translates to 6950 to 7450kHz for the BitX40.

Here is the list of the keys to be used on the keyboard:

  • Numbers 0-9: Same.
  • Clr: Clear entry, reset.
  • Sto ENT: Enter frequency.
  • Batt CALL: Battery voltage output in Morse.
  • Freq: Frequency output in Morse.
  • Send OFST: + 100Hz. Hold +half-second=+100Hz 5x/sec (+500Hz/sec).
  • TIME: - 100Hz. Hold +half-second=-100Hz 5x/sec (-500Hz/sec).

Also planned are a confirmation beep and an out-of-range beep, maybe a battery low every-5-sec beep below a certain voltage to be determined.
I will let him post about his progress here  :)

Stay tuned...

Gil.

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