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Heathkit HW-101 and a limp toob...

Discussion in 'Amateur Radio Modifications' started by kopcicle, Jul 4, 2018.

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Why a Heathkit HW-101?

  1. Benton Harbor Green

    0 vote(s)
    0.0%
  2. Because it tasks me and I shall fix it

    66.7%
  3. Bernard J Scherman Sr

    16.7%
  4. Real radios glow in the dark

    33.3%
  5. They don't make them like this anymore

    33.3%
  6. Some people have more time than brains

    16.7%
Multiple votes are allowed.
  1. kopcicle

    kopcicle Well-Known Member

    Joined:
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    Several weeks ago it was left in "tune" for several days. There were real tears. Kari winces and sticks her lower lip out every time she sees me working on it .There were extenuating circumstances that I won't go into.

    The result initially was a bulged and open C906, one of the 6146's unsoldered a plate cap,and little else in the way of visual damage.

    After getting the bias under control I was able to tune predictably enough . The upper bands are weak of course but I' have noway to test the 6CL6 driver or the 6146's other than in circuit. I do have a Tempo 2020 to test the finals in but the 6CL6 will have to be by replacement.

    I have gotten far enough that I can report 55-60W on 80m , 80w on 40m, near 100W on 20m , and tapering off into less than 20w on 10m.



    Then the saga of th mic amp and little to no drive. Mid-band on any band requires the "load cap" to be fully meshed. Max output for any band is in the upper few Kc of the band. If I remember right this could be the result of low drive. Then V1, no matter what recommended tube I put in the socket I get only 2-5W SSB output with mic gain maxed , tuned to 80-100W, and even a Turner +2 turned all the way up and shouting into it. Depressing. My next plan is to find a 6CQ8 to put in the hole and more completely understand where the ALC voltage comes from and the drive path to and through the balanced modulator and on to the 6CL6 ...

    Have at it. I'm open to any real or surreal suggestions. I have a bunch of maintenance and restoration work to do while I'm in here. I see no reason to not look anywhere for any issue. Eventually it will become a full chassis tear down and board by board cleaning. For now though it has to work.

    Why expend so much effort on a HW-101? Well, because, Heathkit. I'll borrow a phrase that I normally dislike intensely. "If I have to explain you wouldn't understand." :-/

    Then the attachments output-page-001.jpg output-page-002.jpg output-page-003.jpg
     

  2. kopcicle

    kopcicle Well-Known Member

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  3. BJ radionut

    BJ radionut Supporting Member and 6m addict

    Joined:
    May 9, 2008
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