DX20 Heathkit

Discussion in 'Straight Keys - CW Enthusiasts' started by KD2RON, Feb 27, 2017.

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  1. N2EY

    N2EY Premium Subscriber QRZ Page

    AT-1 was a poor design - W1ICP had an article in QST about 1955 which greatly improved it, but the changes were rather radical!

    The power transformers in the DX-35 and DX-40 were undersized and unreliable. They look nice but have a terrible failure rate, particularly if the rig powers the VF-1 VFO via the accessory socket.

    73 de Jim, N2EY
     
  2. K8JD

    K8JD Ham Member QRZ Page

    I have an AT-1 buried somewhere out in the garage. I was thinking of restoring it but It only had 80, 40, 20 and 10/11M. It was designed before there was even a 15M band. :eek:
     
  3. K3XTX

    K3XTX Ham Member QRZ Page

     
  4. W5BIB

    W5BIB Premium Subscriber QRZ Page

    I have 3 DX-20's FREE to a good home. Also several S-38's & AR-3's (just pay packing & shipping) :)
     
    N1BCG likes this.
  5. N2EY

    N2EY Premium Subscriber QRZ Page

    Actually, the AT-1 works on 15 meters - just set the bandswitch to the 10 meter position. This is covered in the manual.

    HOWEVER

    It is quite easy to tune up on the wrong harmonic if you're not careful.

    btw, what we now call the 15 meter band was allocated to amateurs in 1947 at the World Radio Conference in Atlantic City. However, US amateurs were not authorized to use it until May 1 1952.

    I am not sure exactly when the AT-1 was designed, but it was clearly after 1947, so the designers of the AT-1 knew 15 meters was on the way.



    73 de Jim, N2EY
     
    Last edited: Mar 25, 2017
  6. W1BR

    W1BR Premium Subscriber QRZ Page

    dupe
     
  7. W1BR

    W1BR Premium Subscriber QRZ Page

    I had a DX-60 that developed chirp, and when it was fairly new! My elmer helped me trace it to a bad 6CL6 tube! New tube fixed it right up.
    Something to try if all else fails.

    Pete
     
  8. KI5WW

    KI5WW Ham Member QRZ Page

    What a nice thing to do.
     
  9. W5BIB

    W5BIB Premium Subscriber QRZ Page

    Yeah... I just turned 70 & it's time to start "thinning-out the herd"
    Oh!... also have a DX-35, free to a good home :)

    I've already found homes for:
    2 - NCX-3 / NCXA
    2 - SWAN 500cx's
    1 - SWAN 350
    1- Heathkit HX-11
    1 - SWAN-260

    I have a bunch of other stuff, but I'm mainly concentrating on the Heathkit stuff right now.

    Steve / W5BIB
     
    KI7MDI and N2EY like this.
  10. W0GSQ

    W0GSQ Ham Member QRZ Page

    I'd sure like to give that AR-3 a new home, please let me know.
    Steve
     
    N2EY likes this.

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