QCX Mini Build Part 3 - Fixing Mistakes, Passives, and some Tools

Discussion in 'Amateur Radio News' started by KM9G, May 19, 2021.

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  1. KM9G

    KM9G Premium Subscriber QRZ Page

    Sometimes you make mistakes... its all part of the thing, nothing to worry about. In this case I soldered a hole before putting a part in... it happens.

     
    KB2QQM, N7KOM and N1RBD like this.
  2. N1RBD

    N1RBD XML Subscriber QRZ Page

    I accidentally lifted the 12v pad on the main board header connector to the LCD. Had to run a jumper wire from a transformer to the header to get the 12v where it needed to be.

    Also note the "pre-blown" Q5 circled in red. The first batch had really crappy QC. Had to order a few (just in case) from Mauser to replace it. Just glad it was sort of off by itself rather than crammed up against other SMD components. Made it much easier to (de)solder.

    upload_2021-5-19_23-31-7.png
     
    JF1IRQ likes this.
  3. 2E0TWD

    2E0TWD Platinum Subscriber Platinum Subscriber QRZ Page

    Great stuff, Steve.
     
  4. N4PIR

    N4PIR Ham Member QRZ Page

    Steve, what are you getting for output? 5watts? I have 40m mini and am having trouble getting more than 500mw. Adjusting toroids had no effect so I ordered an LCR meter to measure inductance and I think that I will rewind them and see if I can get required inductance as measured by meter, then reinstall them. Not much else that I can think to do.....
     
  5. VE1NRJ

    VE1NRJ Subscriber QRZ Page

    Kill the "music"
     
    KP4SX likes this.
  6. KP4SX

    KP4SX Premium Subscriber QRZ Page

    I don't think that is the best approach. Toroids being off any any reasonable amount won't knock down the power like that on the 40m model. 20, maybe.
    Seems to me you have a bigger problem. Solder joint? The T1 toroid miswired?
    Good luck!
     
  7. 2E0TWD

    2E0TWD Platinum Subscriber Platinum Subscriber QRZ Page

    Please don’t
     
  8. KC5HWB

    KC5HWB Premium Subscriber QRZ Page

    Great job, Steve!
     
  9. VE1NRJ

    VE1NRJ Subscriber QRZ Page

    I love those kind of videos. Very personal, real life. Not to offend anyone but it really distracts from that personal identity we all share. The music destroys that identity.
    Thanks

    Cliff
     
  10. JF1IRQ

    JF1IRQ Ham Member QRZ Page

    Thank you for information.
    It was helpful.

    73 JF1IRQ
     

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