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Who uses what to see if their signal will get there?

 For HF, I've been using the app DroidProp. It's a little clunky, but I love how it presents the information because it tells you what band will work now plus later in the day. It grabs the latest ionosphere info from the web before making its prediction.

 Below is the output for the following setup:
 Tx: Home
 Rx: Houston, Tx
 Mode: CW
 Power: 100W

 Horizontal Axis: Time (24hr GMT). Vertical line is the time right now.
 Vertical Axis: Frequency MHz

 Red means Very likely to make the contact. It looks like 20 and 17 meters are rock solid right now.

For VHF/UHV I just found
 You input the Tx and Rx antenna height and polarization, power, frequency then click on the map the Tx location and pull a box for the Rx area you want to see. Here's my home for 50W on 2 meters.

 One thing it doesn't seem to do is account for the 100' hill across the street from me. Still, it's pretty nice and in general seems to agree with my experiences.

So, what do you use?
Net Activity / Re: Hurricane, EmComm and Interesting Nets On The Air Now
« Last post by caulktel on September 21, 2017, 05:54:45 PM »
I have been listening to this myself.

Net Activity / Hurricane, EmComm and Interesting Nets On The Air Now
« Last post by cockpitbob on September 21, 2017, 04:33:19 PM »
Let's use this as a place to post interesting nets and activities currently on the air.

On the air now:
14,265 SATERN Net for Puerto Rico has been active with net control readable in to MA all afternoon. 

Until just a couple hours ago there were NO ham operators on the air in PR.  Among other things Net Control was asking for a condition report on the airport to see if the Red Cross can start flying in supplies.  I guess those with back-up power had to re-build their antennas.  Net control now is talking to someone in PR and taking traffic.
Net Activity / Re: Radio Vacation and Update.
« Last post by gil on September 21, 2017, 01:24:31 PM »
Hi, no, today is our last day... I have a nice video coming up, of the trip, making a few contacts with the Weber MTR...


Sent from my SM-G928F using Tapatalk
Net Activity / Re: Radio Vacation and Update.
« Last post by scarr on September 21, 2017, 06:43:56 AM »
Will you be on the air today Gil?
Batteries & Solar / Re: My New Favorite Battery Pack
« Last post by Ding Bat on September 20, 2017, 06:50:00 AM »
Thanks, CockpitBob. I just ordered one. It is a great find.

Oh how I love eBay.

Morse Code / Learn Morse Code in 20 Lessons (Koch Method)
« Last post by Sparks on September 20, 2017, 12:53:07 AM »
You want to learn Samuel F. B. Morse's (shown above) most famous code. The South Canadian Amateur Radio Society (SCARS) wants to help. Mark Kleine N5HZR developed this series of web pages to help you learn the 40 characters of the International Morse Code in about 20 lessons. Additionally, you can continue to practice hearing your code for another 20 lessons. In the first lesson we introduce two characters, the letters K and M. Think of this as if you're learning the sounds 'momma' and 'dada', as an infant. You'll listen to these characters, learning to hear, and differentiate their two sounds. Then, you'll come back each, and every day (or two) and listen to 2 new characters in 5 lessons of 5 minutes each. You don't have to listen to all 5 at one time. You can listen to a couple the 5 minute sessions at breakfast, one at lunch, and the last two in the evening. Make each lesson enjoyable, and you'll have a better experience.

Each day you'll build on the characters you already know. During the first week, you may feel frustrated or you may have trouble hearing each individual character. However, by day 5 or so, you will start to notice that the characters are 'slowing down', and you can differentiate the characters. In reality, you're simply learning to hear these tones quicker.

You should concentrate on how each character sounds, and don't rely on a visual representation of the code. Listen to the characters, and hear the rhythm of each one. You will hear Morse Code sent at 20 Words Per Minute (WPM), sent at full speed, from the very first lesson. These tones are purposely sent too fast to count the beeps. You should be training your ear to hear the sound of the character, like you hear the sound of a word. Listen when you are able concentrate on what you're doing, and not overburdened with other activities. Remember, this should be fun. Enjoy the process. So, when you're ready, sign up for the free reminder emails right here, and start with lesson 1, we hope you'll make it through the 40 lessons, and LearnMorse!

Email Notifications
The best way to learn Morse Code is to spend 30 minutes a day listening to code. The best way to make that happen is to have someone else remind you to do it. Enter your email address, and click SUBMIT to start receiving these messages.
New To Radio / Re: HT Programming With Chirp
« Last post by cockpitbob on September 19, 2017, 09:22:31 PM »
Hi Mark, and welcome to the board! :)

I assume the quote below from is what you mean.

The Tones are like a key your radio transmits to unlock a repeater that is "locked" with CTCSS(continuous tone coded squelch system).  In some areas there are repeaters that share the same frequency and are close enough that one will hear the other and re-transmit it.  Or some areas just have a lot activity on the frequencies, some of which happens to be on the repeater's frequency.  Repeaters with Tone Squelch require the incoming signal to have a specific frequency (continuous tone) along with the voice before it will re-transmit the signal.  These tones are always below 250Hz.  Since voice bandwidth is 300Hz - 3KHz, the radio filters out everything below 300Hz and you never hear the tones, but the repeater does.

All modern HTs will not only broadcast the tone you program into them, but you can set it so it will ignore incoming signals without the tone you programmed it for.  That can be handy if the band is full of chatter.  Some repeaters put out a tone, so you can set your radio so it's squelch will only open with the repeater's tone.

Here's a Wikipedia page on CTCSS.

Tone ModeThis sets the mode used to transmit or receive squelch tones (or related selective calling technologies). The following explains what the options means:
  • (None): No tone or code is transmitted, receive squelch is open or carrier-triggered.
  • Tone: A single CTCSS tone is transmitted, receive squelch is open or carrier-triggered. The tone used is that which is set in the Tone column.
  • TSQL: A single CTCSS tone is transmitted, receive squelch is tone-coded to the same tone. The tone used is that which is set in the ToneSql column.
  • DTCS: A single DTCS/DCS code is transmitted, receive squelch is digitally tone-coded to the same code. The code used is that which is set in the DTCS Code column.
  • Cross: A complex arrangement of squelch technologies is in use. See the definition of the Cross Mode column for details.
Net Activity / Re: Maritime CW.
« Last post by gil on September 19, 2017, 11:48:50 AM »
Hello, I don't remember and unfortunately lost my boat, but if you find measurements for the Morris Frances 26 you will have your answer...


Sent from my SM-G928F using Tapatalk

Morse Code / Re: Morse using Inexpensive Stations
« Last post by KK0G on September 19, 2017, 08:53:36 AM »
Ray, you have an uncanny ability to find an image for even the most obscure reference. LOL  8)
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