Author Topic: Getting Started with Ham Amateur (Ham) Radio  (Read 17361 times)

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BassWrangler

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Getting Started with Ham Amateur (Ham) Radio
« on: May 02, 2021, 04:43:18 pm »
We have a few members here who are interested in Amateur (Ham) Radio. There are also several of us who are licensed ham radio operators, including @Bigun who has been active with the hobby for many years. I am starting this thread to give folks a place to ask questions and discuss the topic.

It's been 12 years since my last exam, but I'll try to answer any questions, and hopefully some of the folks more recently active in the hobby can fill in the gaps.

General Resources

The AARL (Amateur Radio Relay League) s the largest US association for amateur radio. They publish the study guides for the exams, and other reference material, and are sort of like the NRA for amateur radio: https://www.arrl.org/
HamExam.org has practice tests and flash cards that will help you prepare for taking the license exam: https://hamexam.org/
HamExam also has a page with links to the study guides for the different license tests: https://hamexam.org/study-materials
Repeater listings (good to find repeaters, but always try and confirm info with the web site of the repeater owner): https://www.repeaterbook.com/i
Unofficial callsign database: https://www.qrz.com/
RadioID.net: Where you would get an ID to transmit on a DMR radio: https://radioid.net/

(There are tons of resources - if you know of some good ones, post to the thread below and I will add them to this list)

Getting Licensed
To transmit or own a radio capable of transmitting on the US amateur radio bands, you will need to get a license from the FCC. There are three levels of license:
  • Technician
  • General
  • Amateur Extra
As you go up in license, you are allowed to transmit on additional bands.

You can find a place to take the exam, along with some instructions on what you need to do ahead of time here: https://www.arrl.org/find-an-amateur-radio-license-exam-session
Many amateur radio clubs administer the exams, and it's a good idea to meet the people in the club. You can find the closest club here: https://www.arrl.org/find-a-club
I recommend checking into the clubs, seeing if there is a "Hamfest", or at least a club meeting, you can go to. You will find people there are happy to help beginners, and a Hamfest is a good way to take a look at equipment, and observe radio operation and procedures.

Equipment
There's a ton to say about Ham radio equipment, but I strongly recommend waiting to buy until you have your license. Your local radio club can help steer you in the right direction. I generally recommend people start out with a handheld radio. You can do a lot with just a handheld, including talking to other Hams via repeaters, listening to satellite transmissions, and there are even times where, with the right antenna, you can talk to the International Space Station. If you retain an interest in the hobby, you may eventually get a more powerful Mobile radio (which can be used in your car, or at home), or even a base station, fixed installation antennas, etc.
« Last Edit: May 02, 2021, 04:48:45 pm by BassWrangler »

Offline Cyber Liberty

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #1 on: May 02, 2021, 05:27:52 pm »
 :bkmk:
For unvaccinated, we are looking at a winter of severe illness and death — if you’re unvaccinated — for themselves, their families, and the hospitals they’ll soon overwhelm. Sloe Joe Biteme 12/16
I will NOT comply.
 
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Offline libertybele

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #2 on: May 02, 2021, 05:30:15 pm »
Thanks for the info on getting licensed @BassWrangler

BassWrangler

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #3 on: May 02, 2021, 06:05:34 pm »
Here's some motivation for the seasoned citizens on the forum:



Elderly couple breaks out of Tennessee assisted living facility using Morse code
By Tamar LapinMay 2, 2021 | 3:48pm | Updated

A series of dots helped them make a dash for it.

An elderly couple used their knowledge of Morse code to escape from an assisted living facility in Tennessee, according to a report.

The husband and wife, who have dementia and Alzheimer’s disease, were able to decipher and memorize the code to an electronic door lock at the Elmcroft of Lebanon home, the Nashville Tennessean reported.

They were missing for about 30 minutes on March 2 before a stranger found them walking about two blocks from the facility, according to state Department of Health documents obtained by the newspaper.

The husband said he had “previously worked with Morse code in the military” and used that experience to learn the code of an electronic keypad as staffers punched it in.

He and his wife were then able to unlock the door of the home’s secure memory unit — and make a break for it.

https://nypost.com/2021/05/02/elderly-couple-breaks-out-of-assisted-living-facility-using-morse-code/

Online rustynail

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #4 on: May 02, 2021, 06:29:48 pm »
Buy used equipment.  Buying new may put you on a list. 

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #5 on: May 02, 2021, 07:24:44 pm »
Thanks @BassWrangler I'll do my best to answer any questions anyone may have in the future.

in addition to the information posted above, I highly recommend this site for your licensing preparation.

https://hamexam.org/

Totally free and it works!  Register and it will take up your study right where you left off the last time.

I recommend going through the full set of flashcards for whatever element you are prepping for (easier said than done as you will soon learn).  Once you have done that, take a few of the practice exams for that element and you will be ready to go.



« Last Edit: May 02, 2021, 07:32:22 pm by Bigun »
"I wish it need not have happened in my time," said Frodo.

"So do I," said Gandalf, "and so do all who live to see such times. But that is not for them to decide. All we have to decide is what to do with the time that is given us."
- J. R. R. Tolkien

Online DB

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #6 on: May 02, 2021, 07:38:16 pm »
 :bkmk:

Offline Skull

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #7 on: May 02, 2021, 07:39:08 pm »
Had my General ticket from 1962-67 or so.  Suppose K3RSS is being used by someone else nowadays. 

Ah, good ole Morse -.-.  --.-  is about all I recall.  Over at Gab there are about seven Ham Groups & one of said Morse code is no longer required for any level of ticket.

When I was in USAF at Hamilton Field I got a chance to play with the Log periodic 20 element beam, on a 100ft tower atop a hill, plus a Collins S line.  Got confused with dipping the plate and peaking the grid or something and blew out the expensive Klystron tube on the KW amplifier.  The MARS operator was quite civilized about it, but no more playing with K6FCT, as the non-MARS call sign was.

Nowadays, just too old and stupid & poor to fuss with equipment.  Sometime I will bore you with how I nearly was killed putting up a  40 meter dipole.
« Last Edit: May 02, 2021, 08:02:07 pm by Skull »
Truth is against the stream of common thought, deep, subtle, difficult, delicate, unseen by passion’s slaves cloaked in the murk of ignorance. Vipassī Buddha

BassWrangler

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #8 on: May 02, 2021, 10:10:44 pm »
Had my General ticket from 1962-67 or so.  Suppose K3RSS is being used by someone else nowadays. 

Ah, good ole Morse -.-.  --.-  is about all I recall.  Over at Gab there are about seven Ham Groups & one of said Morse code is no longer required for any level of ticket.

When I was in USAF at Hamilton Field I got a chance to play with the Log periodic 20 element beam, on a 100ft tower atop a hill, plus a Collins S line.  Got confused with dipping the plate and peaking the grid or something and blew out the expensive Klystron tube on the KW amplifier.  The MARS operator was quite civilized about it, but no more playing with K6FCT, as the non-MARS call sign was.

Nowadays, just too old and stupid & poor to fuss with equipment.  Sometime I will bore you with how I nearly was killed putting up a  40 meter dipole.

Yes, that call sign is now owned by Ronald S Schilling, who apparently requested it as a vanity callsign.

When I unloaded most of my Ham gear about 10 years ago, I sold the little log-periodic that I had. That's one of the things that I regret selling. It broke down into pieces so you could move it. It was dual band, UHF/VHF, so much smaller than the one you used. But very useful for satellite comms.

BassWrangler

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #9 on: May 12, 2021, 12:37:34 pm »
My wife is going through the ARRL book to get her license. I'll let you all know what her experience is. We're planning on leveraging the web site that @Bigun recommended.

Speaking of which @Bigun - do you know anything about Yaesu System Fusion? I hit a new Yaesu FT3DR HT, and was thinking of trying it out on a repeater that RepeaterBook says supports it, but I have no idea how it works.

Online Bigun

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #10 on: May 12, 2021, 02:04:16 pm »
My wife is going through the ARRL book to get her license. I'll let you all know what her experience is. We're planning on leveraging the web site that @Bigun recommended.

Speaking of which @Bigun - do you know anything about Yaesu System Fusion? I hit a new Yaesu FT3DR HT, and was thinking of trying it out on a repeater that RepeaterBook says supports it, but I have no idea how it works.

@BassWrangler

All of our club repeaters are Yaesu and support System Fusion. My base station radio supports digital modes and I've played with it some but not really into it all that much.  You can connect to people all over the world via the WIRES system, but it seems not to be real radio to me.  I guess I'm just an old foggy. Some of our club members are wild about it.

Some of our club members are wild about it.
"I wish it need not have happened in my time," said Frodo.

"So do I," said Gandalf, "and so do all who live to see such times. But that is not for them to decide. All we have to decide is what to do with the time that is given us."
- J. R. R. Tolkien

Offline Skull

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #11 on: May 12, 2021, 02:24:15 pm »
Just looked WIRES up:

WIRES stands for Wide-Coverage Internet Repeater Enhancement System

So radio signals, 6 or 2 meter kinds? are repeated, but what means enhancement?
« Last Edit: May 12, 2021, 02:25:19 pm by Skull »
Truth is against the stream of common thought, deep, subtle, difficult, delicate, unseen by passion’s slaves cloaked in the murk of ignorance. Vipassī Buddha

Online Bigun

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #12 on: May 12, 2021, 02:30:54 pm »
Just looked WIRES up:

WIRES stands for Wide-Coverage Internet Repeater Enhancement System

So radio signals, 6 or 2 meter kinds? are repeated, but what means enhancement?

Well, you do need a radio to access a WIRES enhanced repeater. Our club operates one.

You bring up the repeater which is connected to the internet via the WIRES system and get connected to another repeater of your choosing somewhere in the world.  The people on each end are talking to the local repeater via radio but everything in between is via the internet.
"I wish it need not have happened in my time," said Frodo.

"So do I," said Gandalf, "and so do all who live to see such times. But that is not for them to decide. All we have to decide is what to do with the time that is given us."
- J. R. R. Tolkien

Offline Skull

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #13 on: May 12, 2021, 02:39:18 pm »

You bring up the repeater which is connected to the internet via the WIRES system and get connected to another repeater of your choosing somewhere in the world.  The people on each end are talking to the local repeater via radio but everything in between is via the internet.

Tnx Bigun. Sounds like WIRES is not pure radio for sure.  Resembles FaceTime or Skype without any picture.
Truth is against the stream of common thought, deep, subtle, difficult, delicate, unseen by passion’s slaves cloaked in the murk of ignorance. Vipassī Buddha

Online DB

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #14 on: May 12, 2021, 05:02:06 pm »
I have a Heath SB-1400 I bought in the eighties...

BassWrangler

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #15 on: May 12, 2021, 05:08:59 pm »
@BassWrangler

All of our club repeaters are Yaesu and support System Fusion. My base station radio supports digital modes and I've played with it some but not really into it all that much.  You can connect to people all over the world via the WIRES system, but it seems not to be real radio to me.  I guess I'm just an old foggy. Some of our club members are wild about it.

Some of our club members are wild about it.

Thanks, @Bigun. My wife and I drove up closer to the repeater to try it out - there's a really nice dog park (a huge open field with a fence around it) up there, so we took the dog too. I wasn't able to reach anyone via voice, which is not too surprising around here (lots of repeaters that are only active during nets). However, when I pressed the "X" button on my HT, it connected up and showed me a list that had one other repeater in it - one that's a fair distance away. I selected that, and was able to download and upload text messages, but I wasn't ever able to do that with voice. I guess I need to read more about it and try another repeater.

Unfortunately, the none of the repeaters reachable from my house via HT support YSF.

@Skull - I found this presentation which seems to be a good intro to YSF and WIRES-X:


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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #16 on: May 12, 2021, 05:20:04 pm »
I have a Heath SB-1400 I bought in the eighties...

That's a good piece of equipment @DB and probably will bring more than you paid for it on the market today

I have owned a lot of Heathkit equipment over the years. Most recently an SB 220 which I picked up for very little at an estate sale.  Replaced the electrolytics, updated the keying circuit, and added a parasitic suppression kit before I sold it after obtaining the ALPHA 89 I now own.
"I wish it need not have happened in my time," said Frodo.

"So do I," said Gandalf, "and so do all who live to see such times. But that is not for them to decide. All we have to decide is what to do with the time that is given us."
- J. R. R. Tolkien

Online Bigun

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #17 on: May 12, 2021, 05:25:04 pm »
Thanks, @Bigun. My wife and I drove up closer to the repeater to try it out - there's a really nice dog park (a huge open field with a fence around it) up there, so we took the dog too. I wasn't able to reach anyone via voice, which is not too surprising around here (lots of repeaters that are only active during nets). However, when I pressed the "X" button on my HT, it connected up and showed me a list that had one other repeater in it - one that's a fair distance away. I selected that, and was able to download and upload text messages, but I wasn't ever able to do that with voice. I guess I need to read more about it and try another repeater.

Unfortunately, the none of the repeaters reachable from my house via HT support YSF.

@Skull - I found this presentation which seems to be a good intro to YSF and WIRES-X:

Cellphones, which are just radios, have really done a number on repeater usage all over @BassWrangler
"I wish it need not have happened in my time," said Frodo.

"So do I," said Gandalf, "and so do all who live to see such times. But that is not for them to decide. All we have to decide is what to do with the time that is given us."
- J. R. R. Tolkien

BassWrangler

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #18 on: May 12, 2021, 05:27:33 pm »
Cellphones, which are just radios, have really done a number on repeater usage all over @BassWrangler

For sure, and I guess a lot of people think it's a silly hobby for that reason. But that can be said of most hobbies...

Offline Skull

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #19 on: May 12, 2021, 05:31:21 pm »

@Skull - I found this presentation which seems to be a good intro to YSF and WIRES-X:

Both my browsers are in a panic and warn me not to open that link.  So I will not - for now.
Truth is against the stream of common thought, deep, subtle, difficult, delicate, unseen by passion’s slaves cloaked in the murk of ignorance. Vipassī Buddha

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #20 on: May 12, 2021, 05:33:56 pm »
For sure, and I guess a lot of people think it's a silly hobby for that reason. But that can be said of most hobbies...

Yep!  Right up to the moment their cellphones quit working when a hurricane, or some other disaster strikes.

Try talking on your cellphone then!  (Don't tell them, but a text message will go through even when you can't even think about talking on one.)
"I wish it need not have happened in my time," said Frodo.

"So do I," said Gandalf, "and so do all who live to see such times. But that is not for them to decide. All we have to decide is what to do with the time that is given us."
- J. R. R. Tolkien

Online Bigun

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #21 on: May 12, 2021, 05:36:04 pm »
Both my browsers are in a panic and warn me not to open that link.  So I will not - for now.

Try this @Skull

http://systemfusion.yaesu.com/wires-x/
"I wish it need not have happened in my time," said Frodo.

"So do I," said Gandalf, "and so do all who live to see such times. But that is not for them to decide. All we have to decide is what to do with the time that is given us."
- J. R. R. Tolkien

BassWrangler

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #22 on: May 12, 2021, 05:39:41 pm »
Both my browsers are in a panic and warn me not to open that link.  So I will not - for now.

It's just a slide presentation from some HAM group in Kansas City

BassWrangler

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #23 on: May 13, 2021, 08:16:39 am »
Try this @Skull

https://systemfusion.yaesu.com/wires-x/

@Skull - I watched this video from Yaesu last night. It was a decent overview of YSF and Wires-X.


https://youtu.be/FiQcmAb_e70

Offline Weird Tolkienish Figure

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #24 on: May 13, 2021, 02:54:00 pm »
Yep!  Right up to the moment their cellphones quit working when a hurricane, or some other disaster strikes.

Try talking on your cellphone then!  (Don't tell them, but a text message will go through even when you can't even think about talking on one.)

Yeah but you don't need a HAM license for that. CB or FRS/GMRS radios will do in a pinch.

Offline verga

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #25 on: May 13, 2021, 03:00:28 pm »
 :bkmk:
In a time of universal deceit - telling the truth is a revolutionary act.
�More than any other time in history, mankind faces a crossroads. One path leads to despair and utter hopelessness. The other, to total extinction. Let us pray we have the wisdom to choose correctly.�-Woody Allen
If God invented marathons to keep people from doing anything more stupid, the triathlon must have taken him completely by surprise.

Offline Elderberry

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #26 on: May 13, 2021, 03:01:10 pm »
Yeah but you don't need a HAM license for that. CB or FRS/GMRS radios will do in a pinch.

But how far can you communicate with those? And without a linear.

Offline Weird Tolkienish Figure

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #27 on: May 13, 2021, 03:28:10 pm »
But how far can you communicate with those? And without a linear.

CB radio is famously temperamental based on environmental conditions like skip, FRS and GMRS can go up to 30 miles in line of site, but way less under real world conditions. I watched a good video on it:


http://www.youtube.com/watch?v=3gyPC2AgIyQ

Offline Elderberry

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #28 on: May 13, 2021, 10:23:13 pm »
I may be going about this all backwards, studying for the Extra test first. I just took my first practice test and only missed 2 questions. It made me feel pretty good. I think I'll start studying General now.

BassWrangler

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #29 on: May 13, 2021, 11:02:22 pm »
I may be going about this all backwards, studying for the Extra test first. I just took my first practice test and only missed 2 questions. It made me feel pretty good. I think I'll start studying General now.

If you have a background in engineering - especially electrical - you have a huge advantage over those who don't. I breezed through all 3 tests, but now I realize how much of that was due to the EE education; my wife is going through the book preparing for technician test, and even basic stuff like she metric units of measure prefixes (milli, micro, nano, etc.) are new to her.

Offline Elderberry

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #30 on: May 13, 2021, 11:18:30 pm »
If you have a background in engineering - especially electrical - you have a huge advantage over those who don't. I breezed through all 3 tests, but now I realize how much of that was due to the EE education; my wife is going through the book preparing for technician test, and even basic stuff like she metric units of measure prefixes (milli, micro, nano, etc.) are new to her.

Well yes. I was a Navy Radar tech for 4 years. And even though I was Radar, they sent me to R1051 Receiver school. After I got out, I changed my Major from Organic Chemistry to Electronics Technology, Majoring in Computer Hardware. While going to school I worked and learned transformer design, OJT. My main client was Schlumberger. Once I got my BSET, I never worked hardware. I spent 31 yrs as an integrator, tester, CM, and QA, supporting the Space Shuttle. 

Years after I had gotten my BSET, I walked across the street to the College of Engineering and talked to a counselor about going for a MSEE. Well they hit me with around 32 hrs of prerequisites. I took that course list and went right to the bookstore and looked up the course books for each class on the list. Turns out for almost every class on that list, I had taken a Technology course using the same textbook. Its hell when one college refuses to recognize the course work using the same books, but not from Their College. I never went back. I came close to going back in the Navy as an Officer, but I came to my senses.
« Last Edit: May 13, 2021, 11:34:26 pm by Elderberry »

BassWrangler

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #31 on: May 18, 2021, 03:44:21 pm »
Well yes. I was a Navy Radar tech for 4 years. And even though I was Radar, they sent me to R1051 Receiver school. After I got out, I changed my Major from Organic Chemistry to Electronics Technology, Majoring in Computer Hardware. While going to school I worked and learned transformer design, OJT. My main client was Schlumberger. Once I got my BSET, I never worked hardware. I spent 31 yrs as an integrator, tester, CM, and QA, supporting the Space Shuttle. 

Years after I had gotten my BSET, I walked across the street to the College of Engineering and talked to a counselor about going for a MSEE. Well they hit me with around 32 hrs of prerequisites. I took that course list and went right to the bookstore and looked up the course books for each class on the list. Turns out for almost every class on that list, I had taken a Technology course using the same textbook. Its hell when one college refuses to recognize the course work using the same books, but not from Their College. I never went back. I came close to going back in the Navy as an Officer, but I came to my senses.

Yes, that is why I never went back and got my PhD. It's sort of worthless other than a personal point of pride, anyway.

BassWrangler

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #32 on: May 18, 2021, 03:44:38 pm »
Am considering building an antenna similar to the one described here:


https://youtu.be/mH9_xW_QvVk

Offline Elderberry

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #33 on: May 22, 2021, 07:57:27 pm »
I took my first General practice test and didn't miss any. I'm off to studying Tech now.

BassWrangler

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #34 on: May 22, 2021, 08:50:41 pm »
I took my first General practice test and didn't miss any. I'm off to studying Tech now.

Congrats!

For anyone else wanting to take course, my wife has signed up for the course here:

https://hamradioprep.com/

You can use code "jason20" for 20% off.

I think folks with a comms or engineering background don't need that, but my wife needed a little help to get going.

BassWrangler

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #35 on: May 29, 2021, 12:37:28 am »
Just did APRS for the first time. Pretty happy to see there is a lot of APRS activity around my house.

Online Bigun

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #36 on: May 29, 2021, 09:28:33 am »
Just did APRS for the first time. Pretty happy to see there is a lot of APRS activity around my house.

Back in the old days our local ARES group was regularly involved with search and rescue type operations in this area and often spent more time looking for the searchers than whatever we were originally called on to look for.  APRS has pretty much put an end to that.  These days we spend extraordinarily little time looking for searchers. @BassWrangler
« Last Edit: May 29, 2021, 09:32:38 am by Bigun »
"I wish it need not have happened in my time," said Frodo.

"So do I," said Gandalf, "and so do all who live to see such times. But that is not for them to decide. All we have to decide is what to do with the time that is given us."
- J. R. R. Tolkien

BassWrangler

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #37 on: May 29, 2021, 10:45:23 am »
Back in the old days our local ARES group was regularly involved with search and rescue type operations in this area and often spent more time looking for the searchers than whatever we were originally called on to look for.  APRS has pretty much put an end to that.  These days we spend extraordinarily little time looking for searchers. @BassWrangler

Seems like a really useful technology.

I think my next fun radio project is going to be create a decoder and back-lit display for the 433MHz remote temperature sensor I have outside. Maybe with an RTL-SDR and a Raspberry Pi (massive overkill)

Offline Weird Tolkienish Figure

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #38 on: June 02, 2021, 02:23:24 pm »
Seems like a really useful technology.

I think my next fun radio project is going to be create a decoder and back-lit display for the 433MHz remote temperature sensor I have outside. Maybe with an RTL-SDR and a Raspberry Pi (massive overkill)

I just got my second rtl-sdr last week. They're pretty neat, and the FOS software you can get for it is awesome.

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #39 on: June 02, 2021, 04:59:58 pm »
I just got my second rtl-sdr last week. They're pretty neat, and the FOS software you can get for it is awesome.

I was thinking I would have some work ahead of me to reverse engineer the protocol for these temp sensors. But I discovered this program, rtl_433, that already does this. I stuck it on a Raspberry Pi, plugged in an RTL-SDR, and now it's spitting out my temp sensor readings (along with that of some neighbors).

Just need to figure out how best to display it.

Offline Elderberry

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #40 on: June 02, 2021, 05:35:10 pm »
I've been using this temp and humidity sensor setup for a couple of years now.

https://www.instructables.com/Raspberry-PI-and-DHT22-temperature-and-humidity-lo/

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #41 on: June 02, 2021, 05:50:02 pm »
I've been using this temp and humidity sensor setup for a couple of years now.

https://www.instructables.com/Raspberry-PI-and-DHT22-temperature-and-humidity-lo/

That would work for me, but I already have a Thermopro sensor outdoors, as well as one in my 3D printer cabinet, and so it's convenient to just add another way to view those.

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #42 on: June 11, 2021, 01:08:08 am »
@Bigun - you might find this amusing. I have one of those little SDR devices, and the other evening I saw this strange signal on 4.785 MHz. It was a sawtooth shaped frequency sweep, like radar, but with the low frequency, I didn't think it was radar. Well, some folks at work helped me identify it, and turns out it is CODAR, which is used for monitoring ocean waves and currents.

But that's not the funny part. What's funny is that tonight I tuned back to this area of the spectrum to see if the signal was still there (it was) and noticed what looked like a strong AM signal nearby (4.840 MHz). I tuned to this and it was the MyPillow guy! Seems like he was talking about the election.

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #43 on: June 11, 2021, 09:46:30 am »
@Bigun - you might find this amusing. I have one of those little SDR devices, and the other evening I saw this strange signal on 4.785 MHz. It was a sawtooth shaped frequency sweep, like radar, but with the low frequency, I didn't think it was radar. Well, some folks at work helped me identify it, and turns out it is CODAR, which is used for monitoring ocean waves and currents.

But that's not the funny part. What's funny is that tonight I tuned back to this area of the spectrum to see if the signal was still there (it was) and noticed what looked like a strong AM signal nearby (4.840 MHz). I tuned to this and it was the MyPillow guy! Seems like he was talking about the election.

 :silly: :silly: :silly: :silly:
"I wish it need not have happened in my time," said Frodo.

"So do I," said Gandalf, "and so do all who live to see such times. But that is not for them to decide. All we have to decide is what to do with the time that is given us."
- J. R. R. Tolkien

Offline Cyber Liberty

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #44 on: June 11, 2021, 10:03:04 am »
@Bigun - you might find this amusing. I have one of those little SDR devices, and the other evening I saw this strange signal on 4.785 MHz. It was a sawtooth shaped frequency sweep, like radar, but with the low frequency, I didn't think it was radar. Well, some folks at work helped me identify it, and turns out it is CODAR, which is used for monitoring ocean waves and currents.

But that's not the funny part. What's funny is that tonight I tuned back to this area of the spectrum to see if the signal was still there (it was) and noticed what looked like a strong AM signal nearby (4.840 MHz). I tuned to this and it was the MyPillow guy! Seems like he was talking about the election.

Spurious emissions from a commercial radio station?
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Online Bigun

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #45 on: June 11, 2021, 10:11:52 am »
Spurious emissions from a commercial radio station?

Ain't no AM stations operating legally at that frequency in the USA.
"I wish it need not have happened in my time," said Frodo.

"So do I," said Gandalf, "and so do all who live to see such times. But that is not for them to decide. All we have to decide is what to do with the time that is given us."
- J. R. R. Tolkien

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #46 on: June 11, 2021, 10:26:52 am »
Ain't no AM stations operating legally at that frequency in the USA.

A spur is a harmonic emission at some multiple of the frequency of the original broadcast.  I worked at an AM station at 1260 Khz, and one could go up quite a few multiples and still pick up the station.  2520 Khz, and so on.  4.8 Mhz would only be a few generations and not unheard of.  The FCC cites stations that have too many.
For unvaccinated, we are looking at a winter of severe illness and death — if you’re unvaccinated — for themselves, their families, and the hospitals they’ll soon overwhelm. Sloe Joe Biteme 12/16
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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #47 on: June 11, 2021, 10:33:40 am »
A spur is a harmonic emission at some multiple of the frequency of the original broadcast.  I worked at an AM station at 1260 Khz, and one could go up quite a few multiples and still pick up the station.  2520 Khz, and so on.  4.8 Mhz would only be a few generations and not unheard of.  The FCC cites stations that have too many.

@Bigun @Cyber Liberty

It's not a harmonic. It's WWCR-3:

https://en.wikipedia.org/wiki/WWCR

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #48 on: June 11, 2021, 10:33:47 am »
A spur is a harmonic emission at some multiple of the frequency of the original broadcast.  I worked at an AM station at 1260 Khz, and one could go up quite a few multiples and still pick up the station.  2520 Khz, and so on.  4.8 Mhz would only be a few generations and not unheard of.  The FCC cites stations that have too many.

Yep! Has to be.
"I wish it need not have happened in my time," said Frodo.

"So do I," said Gandalf, "and so do all who live to see such times. But that is not for them to decide. All we have to decide is what to do with the time that is given us."
- J. R. R. Tolkien

BassWrangler

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Re: Getting Started with Ham Amateur (Ham) Radio
« Reply #49 on: June 11, 2021, 10:41:33 am »
Yep! Has to be.

BTW, I was surprised they are licensed to operate at that frequency too - at least in the US. When I heard it there, after confirming with someone else that it wasn't a modulation harmonic in my receiver (I.e. That they were hearing it too), I assumed it was an overseas station. But a search on 4.84 MHZ turned up that Wikipedia article. I haven't checked the FCC FRN to confirm, but I assume it's correct.