Help Support HomeBuiltAirplanes Forum by donating:

  1. Jan 10, 2018 #1

    Streffpilot

    Streffpilot

    Streffpilot

    Well-Known Member

    Joined:
    Jul 13, 2011
    Messages:
    318
    Likes Received:
    170
    Location:
    Mukwonago, WI
    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?
     
  2. Jan 10, 2018 #2

    Wanttaja

    Wanttaja

    Wanttaja

    Well-Known Member

    Joined:
    Sep 15, 2013
    Messages:
    1,262
    Likes Received:
    1,446
    Location:
    Seattle, WA
    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.

    Interesting hobby project, but probably not too cost-effective. One can buy a handheld for $200, and even mount it in the panel like I did....

    [​IMG]

    Ron Wanttaja
     
    Pops and Chris In Marshfield like this.
  3. Jan 10, 2018 #3

    N659HB

    N659HB

    N659HB

    Active Member

    Joined:
    Jul 15, 2017
    Messages:
    28
    Likes Received:
    8
    Location:
    SC Midlands
    Ron, to what is your Fun meter attached?:roll:
     
    MadRocketScientist and mcrae0104 like this.
  4. Jan 10, 2018 #4

    cluttonfred

    cluttonfred

    cluttonfred

    Well-Known Member

    Joined:
    Feb 13, 2010
    Messages:
    6,384
    Likes Received:
    2,240
    Location:
    World traveler
    Hey, this is a family-friendly site, don't answer that, Ron!

    Streffpilot, for an alternative project you might consider one of the many Arduino-based avionics (EFIS, gauges, etc.) that have been discussed here on HBA and elsewhere.
     
  5. Jan 10, 2018 #5

    Arthur Brown

    Arthur Brown

    Arthur Brown

    Well-Known Member

    Joined:
    May 1, 2016
    Messages:
    138
    Likes Received:
    15
    Location:
    London
    Getting a DIY transceiver past all the approval tests will cost more than buying a good one, the making one is easy!
     
  6. Jan 11, 2018 #6

    TFF

    TFF

    TFF

    Well-Known Member

    Joined:
    Apr 28, 2010
    Messages:
    11,647
    Likes Received:
    3,274
    Location:
    Memphis, TN
    The only transmitters you can build are ham. All else has to be FCC approved.
     
    Wayne likes this.
  7. Jan 11, 2018 #7

    pictsidhe

    pictsidhe

    pictsidhe

    Well-Known Member

    Joined:
    Jul 15, 2014
    Messages:
    6,872
    Likes Received:
    1,851
    Location:
    North Carolina
    You'd need to be a ham to build your own. That has strings and knowledge requirements.
     
  8. Jan 11, 2018 #8

    Pops

    Pops

    Pops

    Well-Known Member

    Joined:
    Jan 1, 2013
    Messages:
    7,144
    Likes Received:
    6,034
    Location:
    USA.
    At one time many years ago, Jim Weir, (RST) and articles in Kitplanes, sold a kit of a Nav-Com that you built and sent back to the company for aliment . I built about 6 or 7 of his audio panel kits and also his 3 light marker beacon bench tester. Jim is a sharp dude.
     
    BJC likes this.
  9. Jan 11, 2018 #9

    cluttonfred

    cluttonfred

    cluttonfred

    Well-Known Member

    Joined:
    Feb 13, 2010
    Messages:
    6,384
    Likes Received:
    2,240
    Location:
    World traveler
    I was going to recommend Jim Weir's site in this thread but when I visited it I found that right now he only offers air and ground antennas, an ADSB/GPS/transponder, and t-shirts. There are, of course, many great DIY articles available on his, he just doesn't seem to be selling the components. http://www.rst-engr.com/
     
  10. Jan 11, 2018 #10

    Himat

    Himat

    Himat

    Well-Known Member

    Joined:
    May 5, 2011
    Messages:
    2,799
    Likes Received:
    646
    Location:
    Norway
    Then, if you source the radio, tx/rx, module and only build and program the interface?
     
  11. Jan 12, 2018 #11

    Bill-Higdon

    Bill-Higdon

    Bill-Higdon

    Well-Known Member

    Joined:
    Feb 7, 2011
    Messages:
    446
    Likes Received:
    139
    Location:
    Salem, Oregon, USA


    let's see you find the modules.
     
  12. Jan 12, 2018 #12

    Highplains

    Highplains

    Highplains

    Well-Known Member

    Joined:
    Jun 3, 2014
    Messages:
    355
    Likes Received:
    135
    Location:
    Over the Rainbow in Kansas, USA
    Given the specifications, and maybe $10K for test equipment rental, a functional radio could easily be built using commonly available purchased hardware. I spent most of a decade designing one of a kind communications hardware for DoD alphabet companies back in the dark ages. Of course back then cost was not the object.
     
  13. Jan 12, 2018 #13

    pictsidhe

    pictsidhe

    pictsidhe

    Well-Known Member

    Joined:
    Jul 15, 2014
    Messages:
    6,872
    Likes Received:
    1,851
    Location:
    North Carolina
    You need some qualifications to legally certify a radio. Being a suitable ham is one option. The others get pricey.
     
  14. Jan 12, 2018 #14

    Derswede

    Derswede

    Derswede

    Well-Known Member

    Joined:
    Jan 7, 2016
    Messages:
    839
    Likes Received:
    256
    Location:
    Central North Carolina
    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)
     
    Last edited: Jan 13, 2018
  15. Jan 12, 2018 #15

    Pops

    Pops

    Pops

    Well-Known Member

    Joined:
    Jan 1, 2013
    Messages:
    7,144
    Likes Received:
    6,034
    Location:
    USA.
    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.
     
  16. Jan 12, 2018 #16

    spaschke

    spaschke

    spaschke

    Well-Known Member

    Joined:
    Oct 24, 2012
    Messages:
    233
    Likes Received:
    58
    Location:
    Denver, CO
    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.
     
  17. Jan 12, 2018 #17

    mcrae0104

    mcrae0104

    mcrae0104

    Armchair Mafia Conspirator HBA Supporter

    Joined:
    Oct 27, 2009
    Messages:
    2,994
    Likes Received:
    1,991
    Location:
    BDU, BJC
    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.)

    image.jpg
     
  18. Jan 12, 2018 #18

    TFF

    TFF

    TFF

    Well-Known Member

    Joined:
    Apr 28, 2010
    Messages:
    11,647
    Likes Received:
    3,274
    Location:
    Memphis, TN
    I wish Heath was still around. Been gone as long as the Trash-80 has been.
     
  19. Jan 12, 2018 #19

    mcrae0104

    mcrae0104

    mcrae0104

    Armchair Mafia Conspirator HBA Supporter

    Joined:
    Oct 27, 2009
    Messages:
    2,994
    Likes Received:
    1,991
    Location:
    BDU, BJC
    They are around--see link above.
     
  20. Jan 13, 2018 #20

    TFF

    TFF

    TFF

    Well-Known Member

    Joined:
    Apr 28, 2010
    Messages:
    11,647
    Likes Received:
    3,274
    Location:
    Memphis, TN
    It's good someone pried the can open. For years the owners had it locked down. Still a little shy of the old days though. A friends dad built one of the clock radios back in the early mid 70s. Watched him do it at the kitchen table over a couple of weeks. Plugged it in and nothing happened. After fiddling with it he took it to a Ham friend. Friend looked at it for a while and called him to pick it up. My friends dad got there and his friend breaks the radio over his knee, hands it to him, and says its broken. I always wanted to build the RC radios or a SIlver Seven. The stereos were so cool but way above my third grade abilities of the time. The catalog and Edmond Scientific were just as cool as the Sears Christmas.
     
    mcrae0104 likes this.

Share This Page



arrow_white