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Recent Posts

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11
Antennas / Re: Best Antenna for MTB3
« Last post by gil 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.
12
Antennas / Re: Best Antenna for MTB3
« Last post by galbizua on September 04, 2018, 09:49:51 PM »
Thank Gil !!

I have a doubt you say FT-140-43  but in the picture es FT 240-43.

Supourse that de only diference is the size ?

Don't need tuner?

Thank you
13
Antennas / Re: Best Antenna for MTB3
« Last post by gil 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
Antennas / Best Antenna for MTB3
« Last post by galbizua on September 04, 2018, 12:19:10 PM »
Hy, Guillermo, CP6GA from Bolivia.

I bougth my MTB3  and I need the fiel antenna 20-30-40.

Please recomend me all the kit  in especial Antenna, tuner, etc. I am a beginer.

I see de LNR Precision MTR but expensive

I want a low cost and practic equipment for the jungle, river, etc

Tkank
15
Morse Code / Re: Can Morse Code Still Save You?
« Last post by Sparks on September 04, 2018, 08:49:12 AM »
Radio Relay International  after action report on exercise contains useful information about QRP CW for emergency communication.
http://radio-relay.org/wp-content/uploads/2018/05/RRI-2018-Q1-and-Q2-Exercise-Evaluation.pdf

In that PDF I found this:

Quote
The RRI cycle of quarterly exercises is designed to test specific assets and methods in a sequence leading to more complex scenarios. This first quarter exercise was designed to test radiotelegraph circuits, whereas the second quarter exercise, for example, was designed to test two digital networks.

In the case of the first quarter exercise, it should be noted that radiotelegraphy (CW) is an extremely effective mode for portable, forward-deployed high frequency communications. It offers minimal DC power consumption, elegant equipment simplicity, light weight, few failure points and a capacity to clear a higher volume of message traffic than voice methods, often at a ratio of three to one in a given time- period. With the emphasis on battery power and renewable energy schemes, the use of CW circuits was the logical mode selection for this exercise.

Three frequencies were assigned for use in this scenario:

7115-kHz
10115 kHz
14115 kHz

These are the default RRI watch frequencies (QSX) for the CW mode. In addition, they are specified priority circuits for use during a communications emergency.

Are these three frequencies agreed upon elsewhere than in a "Radio Relay International" context?
16
Net Activity / Re: Global Radio Relay Network
« Last post by RadioRay on September 03, 2018, 10:36:08 PM »
Radio Relay International  after action report on exercise contains useful information about QRP CW for emergency communication.

http://radio-relay.org/wp-content/uploads/2018/05/RRI-2018-Q1-and-Q2-Exercise-Evaluation.pdf

See You On The Radio -

de Ray  ..._ ._
17
Morse Code / Re: Can Morse Code Still Save You?
« Last post by gil 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

18
Net Activity / Re: Global Radio Relay Network
« Last post by N5VMO_Pat on September 03, 2018, 10:14:45 AM »
Interesting idea Gil =)
19
Batteries & Solar / Re: Show us your Solar Power System.
« Last post by N5VMO_Pat on September 03, 2018, 10:02:29 AM »
I'm going to meet with a Ham Buddy Tuesday ( tomorrow ) for making his new trailer / portable Ham Shack ... bug out shack solar / wiring / insulation / heating /cooling / ventilation =)    I have my in-progress ( twenty years in the making ) Search and Rescue / camping homebrew Caravan trailer =)     As the trailer group I belong to over fifteen years calls them "Hard Sided Tent with Wheels " =)    I will try to get pictures of his build and needing to clean up and add new larger doors, add the new painted fenders for the wide tires on the new axle and widen about a foot =)    It is only a Solar powered Ham Shack, emergency communications and sleeping trailer =)
20
Batteries & Solar / Re: Show us your Solar Power System.
« Last post by gil on September 03, 2018, 07:30:25 AM »
Man does that K2 look good! LOL.
Gil.
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