Kenwood TS-440 Repairs ! Part 8. Hunt for RF Output !!

Тәжірибелік нұсқаулар және стиль

Tracking down the paths that stopped the RF output and the antenna tuner from working.

Пікірлер: 24

  • @baccusthedrunken
    @baccusthedrunken3 жыл бұрын

    Thank you for taking the time to do all of these videos, many people will find it very useful, especially the documentation! 73

  • @mikep95133

    @mikep95133

    3 жыл бұрын

    You are welcome! I sure hope folks benefit from these videos !

  • @systemtechnix8924
    @systemtechnix8924 Жыл бұрын

    Hi Mike, your TS440S videos have been so useful during my TS440S repair, even just for comparison of boards, connections, wire runs, screw type and sizes, locations of things, etc. - many thanks! I am nearing the end of what has basically turned out to be restoration as I had to reflow every one of the main boards in my TS440S. The soldering was so borderline, I had no choice. I was checking part 8 of your video series to see if you encountered a mystery part I found in the Final Unit (MOSFET power amplifier board that sits under the Filter Unit shelf). It's an L-shaped piece of copper that looks like it is used to wedge between something and the chassis ground. The problem is this piece was just lying in the corner of the Final Unit once I lifted the Filter Unit with its metal shelf out. The piece must have fallen out of where it is supposed to be placed before the Filter Unit shelf is put back into the radio. Did you come across this piece and, if so, do you know where it goes? I thought that it might need to sit on top of the big ferrite oval ring and then the Filter Unit is screwed down to keep it in place while, presumably, adding additional grounding?

  • @mikep95133

    @mikep95133

    Жыл бұрын

    I don't have a clue ! It's been so long for me that my memory is in the videos. Sorry brother.

  • @systemtechnix8924

    @systemtechnix8924

    Жыл бұрын

    @@mikep95133 No problem, Mike. Thanks for replying. I think I worked it out, or at least I hope I have. I sat it on top of the large ferrite core as that is really the only place it can be held down while grounding. Good luck with your TS440S when you resume work on it. I am sure that with a fresh look you will nail all the faults. 🙂

  • @mikep95133

    @mikep95133

    Жыл бұрын

    @@systemtechnix8924 Good luck to you too !!

  • @w.rustylane5650
    @w.rustylane56503 жыл бұрын

    I'd have given up on the TS-440 and got me a TS-430S. I think the 430S is a better solid state radio and doesn't suffer from the dots syndrome. When I upgraded from Technician to General Ham license I got a working Kenwood TS-430S with a dedicated power supply PS-430 and glad I did. The price was right and I just have picked up an off center fed long wire antenna to work with the unit. I'll have to find an antenna tuner to borrow to get my antenna trimmed properly. 73 from K9POW in eastern Tennessee.

  • @mikep95133

    @mikep95133

    3 жыл бұрын

    My 440 has a built in tuner. Really helpful. Does the 430 have a tuner as an option ?

  • @theGADGETSplaylist
    @theGADGETSplaylist4 жыл бұрын

    Just watched #6, #7 and #8 I had no idea of the patience you have, Mike! A rare breed, my friend... Good luck with it, you sure deserve to have this running 100% at the end of it all. That 220v solder sucker I featured a while back...you'd like that thing, I think... Denis

  • @mikep95133

    @mikep95133

    4 жыл бұрын

    Thank you Denis, for watching my videos. Multiple layers of problems on this radio.

  • @vk6kfk
    @vk6kfk19 күн бұрын

    Would you have a tear down on the 13.8v DC Power jack area on back of radio, you come close to it on this video, my radio some one put the wire's we think straight to the board with out the socket, I have a PS-430 to hook up the correct way but the 440s is missing the DC Jack Socket.

  • @mikep95133

    @mikep95133

    19 күн бұрын

    I wish I could help. I don't believe I've worked on the dc jack.

  • @vk6kfk

    @vk6kfk

    16 күн бұрын

    @@mikep95133 Know any were in the US I can get one via online shop ?

  • @mikep95133

    @mikep95133

    16 күн бұрын

    @@vk6kfk Sorry, no idea.

  • @user-qw4jy2ub3x
    @user-qw4jy2ub3x9 ай бұрын

    Maybe if you are going to remove those electrolytics, you might as well replace them. Just sayin'. Also, maybe if you want to clean the "blue" off of those pins on the power board, you could carefully use a small piece of fine steel wool and rub them up a bit. But it might not make any difference. Also, Be careful: steel wool and electronics never mix well (loose stray strands!).

  • @Mikeyearout
    @Mikeyearout3 жыл бұрын

    Hey Mike your videos are Awesome and I have learn a lot from them. Thank you so much. Believe me you are not boring in any way. I want to try and fix my TS-440 because it stopped transmitting and these video are priceless. Do you repair these radio's still? If I could I would be interested in having you repair mine for me? I just fear casing more problem if I try and fix it. Unfortunately I sent my Radio to someone else and paid over $300.00 to have it aligned and checked out. Then last night it just quit transmitting. I had "No" output and I was not able to tune it to my antenna with my MFJ 949E tuner and my Dossy Power and Watt meter. Earlier this week it worked fine and was talking to other ham on it. So let me know what it would cost to go thur it and make well again?

  • @mikep95133

    @mikep95133

    3 жыл бұрын

    Try a dummy load and a power meter only during transmit. See if that helps.

  • @cosimonisi5016
    @cosimonisi50163 жыл бұрын

    can u say me the capacity and the voltage of the two capacitors?

  • @mikep95133

    @mikep95133

    3 жыл бұрын

    No idea. So sorry.

  • @bbugin4u
    @bbugin4u4 жыл бұрын

    Cool soldiering tip, what setup iron that?

  • @mikep95133

    @mikep95133

    4 жыл бұрын

    Metcal. The big tip is .410" wide. I don't know the part number. Helps a lot to do multiple pins at the same time. Only takes seconds.

  • @rnickel123

    @rnickel123

    4 жыл бұрын

    I have the same tip for my Metcal. It is a huge timesaver when removing caps. No more rocking back and forth. The other Metcal tool that I like is the Talon tweezer for removing/inserting surface mount components.

  • @mikep95133

    @mikep95133

    4 жыл бұрын

    @@rnickel123 Hi Rick. I have a Talon but stopped using it years ago. A pair of sttc-126 tips work so much easier for me.

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