@turbominivan came over to my place last night and taught a fantastic HAM 101 class. Here are my notes from the class. I'm sure there are exceptions to everything, but this was great info for a noob like me. These are my notes. Any errors are mine, not turbominivan's.
Ham radio encompasses over 10 different bands. Anyone is allowed to listen (receive, or RX) to any band. However, you need the appropriate license to transmit on these bands.
Technician license lets you TX (transmit) uhf, vhf, and select parts of hf.
The most common band for car to car is 2m. The second most-common band in Utah is 70cm. Most 2 band radios cover these two bands.
Most 4 band radios cover: 70cm, 2m, 6m, 10m (10m is HF, you need a general license for this) (4 band radios are a lot more expensive)
Hf is high power and what gets you talking across the world without a repeater. HF depends a ton more on weather.
Dempsey's handheld is a Yaesu Ft-60 (~$150)
Simplex means you're talking radio to radio not using a repeater. It's just like a CB or walkabout. You have to be on the same frequency [channel] as each other.
Duplex/Repeaters
Duplex is when you're using a repeater. The input frequency (In this case we'll call it frequency "A") is different from the output frequency (frequency B" in this example). (2 frequencies = duplex). The repeater is always listening on frequency "A". When you transmit to the repeater's input frequency (A), it picks up your message and repeats it back on a different frequency (B) with TONS more power. So even if you don't have a super crazy antenna, as long as you can transmit to a repeater, you can utilize the repeater's crazy big antenna to magnify your transmission. When you transmit to the repeater (on frequency A), it'll repeat your signal (instantaneously) out on the new (shifted) frequency "B". This caused me to wonder - how do you know what frequency to listen to? There are charts that show the exact frequencies that each repeater uses for tx (A) and rx (B). To talk duplex, you need to program in your input [tx]frequency (A) and output [listening] (B) frequencies to your radio. Your radio will then know which frequency to talk on (A) and which frequency to listen on (B). Repeaters have a standard offset, where the TX frequency (A) and RX frequency (B) are a set distance apart (for 2M, +600 kHz or -600 kHz). Some radios are able to detect the frequency shift automatically, while other radios need to have this programmed in. Also, some repeaters require a tone to start talking. Not all radios are capable of sounding this tone.
Get the Repeaterbook app. It'll show you where all the repeaters are.
Every once in a while, people link repeaters, like the interlink or sinbad system. These repeaters are all linked via the internet. So, when you talk to one repeater on the Sinbad system, that repeater repeats your message across every single repeater in the system. (it does this via the internet, not by beaming the signal from antenna to antenna). This is a great way to get some good distance. The sinbad system connects all the way down into Green River and Moab up to SLC. Since only one person can talk at a time, be courteous, as others may want to use this repeater too.
the intertie connects Idaho, Utah, Nevada, and parts of CA.
If two of you are chatting together, don't use the intertie, cuz it'll plug it for everyone; find a different repeater that you can both hit.
Etiquette, even on simplex, leave a small break between conversations for a couple seconds. This allows others with emergencies have a spot to get in there and enter the conversation.
There are two types of repeaters: open repeaters and closed repeaters. Open repeaters are free and open to be used by anyone. Closed repeaters are only for people they designate (some closed repeaters are pretty snobby).
How do you talk on a ham?
- you need to enter a frequency. Think of this kind of like the "channel" on your CB or walkabout. Everyone who wants to listen in on channel 1 has to be on channel 1 (except ham channels look more like this: 146.070).
- only one person can talk at a time (just like a CB or walkabout)
- if you want to use a repeater, you just need to know the frequency of the repeater. Program it into your radio, and start talking. On the more popular repeaters, expect to see more traffic and hear others talking.
HT- handy talkie (handheld). 4w max - same power as a cb
Car mounted (mobile) radios are often around 50-75watts.
Home radios can reach 200 watts +
Having a real nice antenna will greatly improve your reach.
Baufeng antanna gender is opposite a Yaesu
Nate has a Nagoya Na-771 antenna.
Dempsey has a homebrew antenna from a guy in AF. He calls them signal sticks
As far as listening goes, your antenna doesn't matter much. With transmitting, you want a good antenna. The rubber duckies don't TX well at all, especially indoors.
Rael-co is a great electronics store to go to in SLC.
Miklor- THE website for people who use the Baofeng radios. They've improved upon hte crappy instructions that come with these radios.
Chirp - free software to program your radio's presets. The Yaesu radios have 1000 preset spots. Imagine typing all those in by hand. With Chirp, you can upload an excel file to your radio so you don't have to do it one by one. to use chirp, you have to buy a programming cable for your radio.
Cb radios use am frequencies. Most hams use fm frequency
Aprs.fi - attaching geolocation data to your signal. People can see where you are. You can also send texts to other hams, even without cell service.
Nate has the
Yaesu Ftm-400xdr
$620 before the rebate
You can add aprs to a baefabg
146.76 - the 76, utah ham club.
FRS - family radio service. Walkie talkie. 1/2 watt power output
Gmrs-general mobile radio service - walkie talkie too. 22 total channels. gars .5-4w
you're supposed to have a license to use GMRS.