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Compact 1500 Watt Custom Built for my Flex 6400M

Member ✭✭
edited May 2020 in New Ideas
As promised here is start of my Amplifier built by Jim @ Dx World Jim_811@yahoo.gr This newest one with SWR Metering and Power Meter. The two board front left of picture are twin 1500 Watt transistors Custom Black Box is being built now Amp will be complete in 14 days .Ill post more pictures of built/ Joe KL4 QG image
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  • Member ✭✭
    edited November 2019
    Man, you've got some fun lying ahead of you!

    Two places that might be helpful:

    SSPA Facebook Site - all sorts of doods building these amps

    N4GA Website - more of a general EDU site

    Enjoy! 

    Rob


  • Member ✭✭
    edited May 2020
    Rob I’m not good with my hands Jim at Dx World the professional amplifier builder ,I have his first model 1500 watt , I use it at water plant when working overtime.It sounds better than my Ten Tec Titan 425 that uses two 800 Tubes , Dx World tops the Titan for wattage output too. He builds amazing amps HF,UHF and VHF Thank You Rob for kind words !!
  • Member ✭✭
    edited May 2020
    The finished 1500 watt amp will look like
  • Member ✭✭
    edited May 2020
    image
  • Member ✭✭
    edited November 2019
    Pricing ?  Do you have to supply your own power supply ?
  • Member ✭✭
    edited November 2019
    Jim can supply the 48 volt power supply or you can Buy PS it’s best email Jim email address my first post ! I don’t want Q price for Jim newest model amps with SWR and Power Meters as parts prices might changed ... Jim will give you spec on power supply’s ,the PS are all over EBay or supply houses most under $100 My first 1500 watt amp with power Supply was $1900 but remember that was a custom build for me - All my friends on AK SSB nets are giving me my best signal and audio reports they produce very clean signals on receiving Stations Scopes .
  • Member ✭✭
    edited November 2019
    Can you supply a url to his site, please?
  • Member ✭✭
    edited November 2019
    http://www.dxworlde.wixsite.com/dxwor...

    Tell Jim ,Joe from Alaska sent you he nice family guy he answers emails fast
  • Member ✭✭
    edited November 2019
    Joe, does your amp change bands automatically ?
  • Member ✭✭
    edited November 2019
    No I don’t like auto band switching I don’t trust !!!
  • Member ✭✭
    edited November 2019
    The metal cabin just received image
  • Member ✭✭
    edited November 2019
    I have the same amplifier. What are those 2 other metal boxes for?
  • Member ✭✭
    edited November 2019
    It’s surprise your see soon.
  • Member ✭✭
    edited November 2019
    Following closely. 
  • Member ✭✭
    edited November 2019
    Ok I’ll let the Cat out of box the two other black boxes are qrm eliminator to build
  • Member ✭✭
    edited November 2019
    it works with any transceiver. this connect between transceiver and amplifier.
    is good if you have qrm noise from local area . It is used to reduce or eliminate qrm from receiver like noise that produce some locals tvs or power lines etc. see this video: https://youtu.be/mtoO_UJBW0c
  • Member ✭✭
    edited May 2020
    today have test the two modules separately and lpf working excellent !

    image
  • Member ✭✭
    edited May 2020
    Hello Joe today have make a stress test to modules.i have put 2 temp protection that if temp goes to 60*c on top case of ldmos or if temp goes 45*c on heatsink will bypass amplifier until it cool down to safe temp. i have also the swr protection and current protection board ready.will set swr to stop linear when is 2:1 or moreimage
  • Member ✭✭
    edited May 2020
    More progress imageimageimage
  • Member ✭✭
    edited November 2019
    coming together man!

    Like the air cores

    Keep us posted

    www.N4GA.com


  • Member ✭✭
    edited May 2020
    project so far...now the final is the back cover and will start all adjustments and tests. 73simage
  • Member ✭✭
    edited May 2020
    Hello Joe
    the amplifier is ready.
    working very well.
    have test everything to load and antenna.
    modulation very clean.

    i have set the swr protection to about 1.8-2:1 and test it also with no antenna like if antenna broke!protection work excellent!
    also have overload protection that if power output goes more about 1700w to stop it.
    and also temperature protection that if goes very hot it bypass amplifier until cool down.

    input 0-100w max
    output 1-1700w max 160-10m and 1450w 6m. I also have put RCA jack on the back of amplifier for PTT start to connect with transceiver because the auto start cannot work with the protections. will send you photos of back to see it later.and nice videos Happy Holidays
  • Member ✭✭
    edited May 2020
    I’m very excited In mean time I’m using my late father Ten Tec Titan 425 amp great old boy very powerful ,going loan 425 to high school ham club when new amp gets here -

    Happy Holidays All
    Joeimage
  • Member ✭✭
    edited May 2020
    imageimageimageimage
  • Member ✭✭
    edited May 2020
    I’m looking trying his QRM Master too Joe ,tomorrow will have ready the qrm eliminator also
  • Member ✭✭
    edited May 2020
    image
  • Member ✭✭
    edited May 2020
    Hi Joe here is the video: https://youtu.be/2ccLNkzxQOg
  • Member ✭✭
    edited May 2020
    https://youtu.be/VXQ6TTwiaCc

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