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Messages - gil

Pages: [1] 2 3 ... 191
1
Antennas / Re: Ground Tuning Unit.
« on: November 20, 2018, 05:50:37 AM »
Hello.

Here is another one; image attached...

Parts List:
  • Variable resistor 50k/ohm R1.
  • Switch single pole 12 way S1.
  • Capacitor variable 500pf air spaced (1mm recommended) C1.
  • Diode point contact germanium diode 1N34 OA91 D1.
  • Toroid T50-2.
  • Meter 50 or 100ma L1, M1.
  • Enamelled copper wire 1.8 or 2mm (14swg)and 0.5mm(24swg).
  • Insulated shaft extension.
  • Capacitor 10nF (103) C2.

Quote
Gil, the Mac version of the free OpenOffice suite opens DOCX files with no problems.

Yes, thanks, usually it does, but not this time, weird...

Gil.

2
Antennas / Re: Ground Tuning Unit.
« on: November 19, 2018, 11:34:23 AM »
Thank you, much appreciated!

Gil

Sent from my SM-G928F using Tapatalk


3
Antennas / Ground Tuning Unit.
« on: November 19, 2018, 06:51:03 AM »
Hello,

Here is an interesting document on a portable station using a ground tuning unit...
If someone could turn it into a PDF and email it to me: gil@thisdomain.com (switch thisdomain.com for radiopreppers.com). I can only open it on my phone but not my Mac...
Have anyone here used a ground tuner? Comments?
Thanks to Alex, VK2PRC for sending me this file.

Thank you!

Gil.

4
Morse Code / Re: Morserino-32 a new multifunctional Morse code machine
« on: October 30, 2018, 07:52:36 AM »
Good one, thanks Sparks.

Gil.

5
Antennas / Re: Remote Antenna Tuner Part 2
« on: October 22, 2018, 07:34:57 AM »
Great, on my watch list... I'll watch them tonight :-)

Gil.

6
General Discussion / Re: KX3 MARS Mod.
« on: October 15, 2018, 11:45:58 AM »
Hi,

Did you get the latest versions from Elecraft?
The programs posted here are probably out of date...

Gil.

7
Hello,

Definitely a low current draw on receive. Now I would also add the 80m band as a requirement, or at least 40m, but 80m is better for NVIS. I am a big fan of CW for its efficiency and simplicity, but SSB is important too, and required for digital modes, though I am not a fan of digital, but it has its place.

Bottom line is, I don't think you can get away with only two radios... You would need an HF radio and a VHF/UHF one for local comms. Some do both, like the Ft-817/818nd but of course, you can only listen to either at the same time...

For me, I would have a small CW radio for bugging out, and a military SSB radio for bugging in or camp setup. UHF Handhelds for group members...

One important thing is to be able to listen to the broadcast news on HF (short-wave)...

Gil.

8
Digital Modes / Off-Grid Crypto Transaction Primed for Post-Apocalypse.
« on: September 20, 2018, 04:14:45 AM »
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.

9
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.

10
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.

11
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.

12
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.

13
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.

14
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


15
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.

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