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  • [SSDN] Differential Temperature Compensation Capacitors in the Hallicra

    From SSDN via rec.radio.amateur.moderate@21:1/5 to All on Wed Feb 16 19:06:16 2022
    XPost: rec.radio.amateur.moderated, uk.radio.amateur, free.uk.amateur-radio

    SolderSmoke Daily News

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    Differential Temperature Compensation Capacitors in the Hallicrafters HT-37 Main VFO Tuning Circuit

    Posted: 15 Feb 2022 10:49 AM PST http://soldersmoke.blogspot.com/2022/02/differential-temperature-compensation.html

     I've been watching with great interest Mike WU2D's excellent series on VFO construction.  His second video is especially interesting because he talks about how we can use a split stator differential capacitor to build a temperature compensation circuit that will allow us to "dial in" the proper amount of temperature compensation.  The heart of this circuit is the split stator differential

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    Podcast (Audio) Version of Bill's Talk to the L'Anse Creuse Amateur Radio
    Club

    Posted: 14 Feb 2022 04:53 AM PST http://soldersmoke.blogspot.com/2022/02/podcast-audio-version-of-bills-talk-to.html

    Tony G4WIF suggested that I make this talk available as an audio
    recording.  Good idea. Here it is: http://soldersmoke.com/N2CQRHomebrewing.mp3

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    6EA8s in the Mate for the Mighty Midget, and WA9WFA Re-Builds a Heath HW-12

    Posted: 14 Feb 2022 10:05 AM PST http://soldersmoke.blogspot.com/2022/02/6ea8s-in-mate-for-mighty-midget-and.html

    I reported to Scott and Grayson that I had finally gotten around to
    changing the three aging 6U8 tubes in my Mate for the Mighty Midget
    receiver.  I replaced them with three more youthful 6EA8s.  This switch really seemed to perk up the old receiver.   I'm listening to 75 meters on
    it right now. Speaking of 75 meters, Scott sent me this picture of his
    latest effort:  re-building a Heathkit HW-12.

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