Resources for projects

Discussion in 'Homebrew and Kit Projects' started by KD9JTM, Dec 6, 2017 at 2:21 AM.

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  1. KD9JTM

    KD9JTM Ham Member QRZ Page

    Hey guys so I am really interested in building my some of my own stuff. So I was wondering if you guys could help me out with links and such. I found the one think in the Hf amplifier thread that link was great and I will probably end up making the 2m 80w amp. If you could share what you’ve found that would be great. Seems like a permanent post would be in this sub forum with a bunch of that type of info.

    I have built other small circuits before and have some light experience with arduino and other MCU’s.
     
  2. KB4QAA

    KB4QAA XML Subscriber QRZ Page

    What kind of resources?
     
  3. VK3YE

    VK3YE Ham Member QRZ Page

  4. W9GB

    W9GB Ham Member QRZ Page

    6326A7E9-B4D0-4494-B5B7-F7D4BDAE5C7E.jpeg E4A73E98-E23C-4920-BF57-CCA79E945E17.jpeg
    The May 2013 issue of QST magazine featured an 80 watt, All-Mode 2 meter amplifier,
    designed by Jim Klitzing, W6PQL (retired HP engineer and VHF/UHF/Microwave experimenter).
    http://www.w6pql.com/2_meter_80w_all_mode_amplifier.htm
    46FD16B7-5DD2-4661-A95F-332CFDD89303.jpeg
    His design uses the Toshiba S-AV36 MOSFET power module.
    https://www.rfparts.com/fileuploader/download/download/?d=0&file=custom/upload/File-1362185227.pdf
    RF Parts notes that Toshiba ended production of S-AV36(A) in 2011.
    Talk to W6PQL and/or RF Parts for production updates and substitution modules.

    https://www.rfparts.com/module/rfpower-mosfet/mosfetpowermod-vhfhp/sav36a.html
    W6PQL sells the bare PC board for $17.50 and a board populated and pre-aligned low-pass filter (photo above). While not a beginner or Heathkit style kit, may fit your need.

    A bill of materials (BOM) is provided for gathering the parts you don't have on hand, and is grouped by the recommended supplier. For parts supplied by Mouser, you can order all of these by ordering the project list from their web site at: http://www.mouser.com/tools/projectcartsharing.aspx.
    The access I.D. code for the project is c3ad150d1a

    Miscellaneous parts for amplifier enclosure (Builder’s design or station matching).
    http://www.w6pql.com/2m/80w-amp/bom2.pdf
    W6PQL web site has plans for metal chassis shown, drill sizes, metal bending, and cutting.
    http://www.w6pql.com/2m/80w-amp/photo-07.jpg
    http://www.w6pql.com/2m/80w-amp/photo-08.jpg
    http://www.w6pql.com/2m/80w-amp/photo-09.jpg
     
    Last edited: Dec 6, 2017 at 4:37 PM
    WA7PRC likes this.
  5. KD9JTM

    KD9JTM Ham Member QRZ Page

    resources like project ideas or plans or kits. I don't know enough to start from scratch and build something. I know enough to build something though even if it is all SMD stuff. I have the equipment at home to do SMD. I would love to expand my knowledge and be able to design and build something.

    W9GB-- that is the amplifier I am prolly gonna build as my first project.
     
  6. W7UUU

    W7UUU QRZ Lifetime Member #133 Life Member Platinum Subscriber QRZ Page

    That's a very ambitious first project. First off it's SMD components - do you have experience soldering SMD? Or making circuit boards? Add to this it's of course VHF, which has narrow tolerance for "slop" in layout and wiring. Not wanting to rain on your corn flakes - but it may be too much for your very first effort at building something. There is a complete kit for it here: http://www.w6pql.com/parts_i_can_provide.htm#2m80w if you want to buy a pre-made PCB instead of making your own.

    You may wish to start a little more humbly with some kits like found here: http://www.electronickitsbychaneyelectronics.com/

    Or just Google "electronic kits" to find many others....

    Just a suggestion

    Dave
    W7UUU
     
  7. KD9JTM

    KD9JTM Ham Member QRZ Page

    Yes I have many years of soldering SMD. Including BAG reballing and trace repair. Ive even done a little multi layer board repair. It's what I do for a living. I solder 01005 components all day long. I also have some experience etching my own boards. That being said I would prolly just buy the unpopulated board. My abilty to etch my own boards is limited to small boards although it would take much to scale it up to do bigger stuff for the price of the board pre etched with solder mask is great. So there would ne now problem in completing the project. Like i said above my abilty to build is there, the ability to design and build is not.

    I want to learn the theory behind it. and I feel that building and learning what things do as I build is a way to accomplish that. I have a understanding of DC/AC electronics but its limited.
     
  8. KD9JTM

    KD9JTM Ham Member QRZ Page

    Super interested in power supply design and building as well. A goal of mine and has been for a few years now is to build my own high power power supply. I am also and avid RC enthusiast and part of that includes helicopters. I charge my batteries at 30-40amps and my charge requires a 24volt P/S capable of delivering 50a.
     
  9. K6CLS

    K6CLS Ham Member QRZ Page

    Get a copy of the ARRL Handbook. It covers the theory and has ham related projects at all skill levels.
     
  10. WA9SVD

    WA9SVD Ham Member QRZ Page

    I used the ARRL HB circuits as a guide, and built a 4A (13.7 Volt, close enough for Amateur work...) supply using an LM-350 regulator, and a "crowbar" over-voltage protection circuit. I was lucky enough to get a couple of unassembled ASTRON supplies at Henry's Radi0 in L.A. before they closed their store, and all it had were the power connector, power cord, fuse holder, power switch, and transformer. That made things easy. (I had the case, XFMR, power switch, fuse holder, and standard power connector built in!) The filter capacitor I used took up about 80% of the case inside, but that was not a problem. I etched the circuit board myself for the additional parts (the LM-350 in TO3 case WAS mounted on the back, with a generous heat sink) with plenty of space to spare. It has worked for over 12 years for station accessories (TNC's, clocks, etc.) as well as for accessories during Field Days. It takes a load off the main power supply (Astron RS-35) to the transceiver.
     

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