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#### Streffpilot

##### Well-Known Member
Hey, I was sitting at work and had a hair brained idea.....how possible would it be to create your own radio....I see websites of ham radio guys using arduino's with a touch screen to control it......what say ye brilliant minds?

#### Wanttaja

##### Well-Known Member
Hey, I was sitting at work and had a hair brained idea.....how possible would it be to create your own radio....I see websites of ham radio guys using arduino's with a touch screen to control it......what say ye brilliant minds?
Probably would be possible. However, the FCC has rules for aircraft-band radios to prevent them from bleeding over into other frequencies, etc. Would make the job tougher, and you'd probably need a lot of RF smarts and expensive test gear.

#### pictsidhe

##### Well-Known Member
You need some qualifications to legally certify a radio. Being a suitable ham is one option. The others get pricey.

#### Derswede

##### Well-Known Member
Aircraft frequencies are off limits for ham transmit operation. Even modifying a VHF ham radio to transmit would be a major fine $. I see FCC actions against illegal CBers (high power, in the ham bands, etc) all the time, the fines are in the tens of thousands. Also, most Amateur rigs in that range are FM modulation, not AM as aircraft radios are. Now, a RECEIVER is fine. I have built several kits that cover the air band and which allow me to listen to the ops at the local airport. A couple of kits are available with some searching. However, I have found several handheld radios for under$100 off of craigslist and at local hamfests. To build one to FCC specs would take the assets of a Yaesu, an Icom, etc. Is it possible to build one? Yes. Would I want to build a transmitter for such purposes? No.

Derswede (N4ABA)

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#### Pops

##### Well-Known Member
HBA Supporter
Log Member
Used to take a First Class FCC Radiotelephone License to tune or adjust any transmitter over 50 milliwatts. I had an appointment to take the test in the mid 1965 but got very sick for several weeks and never got a new appointment to the test.

#### spaschke

##### Well-Known Member
It would be quite easy to build with a lime SDR and a small PC or mac mini. This software approach would need a faster computer than a raspberry pi. The lime SDR is new on the market, is one of the few SDR products that will transmit full duplex and costs around $300 if I remember correctly. A small pc and monitor might cost$500-800. GNU-Radio would be an easy to use programming environment. AM or FM, as well as filters and tuning is implemented in software, thus the need for a fast computer. An output booster may be needed also. I think the output signal strength is up to 10 dBm.
Could you use it? I don't know.

#### mcrae0104

##### Well-Known Member
HBA Supporter
Log Member
Too bad the folks at Heathkit don't offer an aviation radio. (They're the modern-day version of the company that produced the Heath Parasol.)

#### TFF

##### Well-Known Member
I wish Heath was still around. Been gone as long as the Trash-80 has been.

HBA Supporter
Log Member