Three transistor JS8 receiver for 3.5 MHz

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  • Опубликовано: 21 окт 2024

Комментарии • 28

  • @MIKROWAVE1
    @MIKROWAVE1 4 года назад +1

    Very Nice Peter! Simple does it! I did a W1AW code practice receiver for QST mag. back in 98 using this idea, but it was a regenerative detector around the crystal because there was no need for that kind of JS8 stability. Excellent video work.

  • @edwinklaver
    @edwinklaver 4 года назад

    Good Job Peter, these are the kind of videos I like, you go into great detail. I've learned quite a lot from you over the years. Thanks for that.

  • @Cptnbond
    @Cptnbond 4 года назад

    Hi Peter, thanks for another awesome video. I really like the simplicity.

  • @dannonight
    @dannonight 4 года назад +2

    Thanks, Peter. I'm in the process of building a Beach 40. I wonder if it would be possible modify the Beach 40 to work on 80m and to include the JS8 transceiver circuitry end up with a Beach 80 with JS8 capability? Just an idea.

    • @vk3ye
      @vk3ye  4 года назад +1

      Dan - both should be possible but have not yet done it.

  • @vk2ig
    @vk2ig 4 года назад +3

    5:10 and 6:30 - you have bugs in this circuit! :-)
    Could you add a 90 degree phase shifter at the oscillator buffer output, another mixer fed from the antenna, a polyphase network to phase-shift the resulting audio by 90 degrees, an audio summer to produce USB only?
    Merry Xmas Peter, and thanks for the video.

  • @indrajitR
    @indrajitR 4 года назад +2

    Simple circuits which WORKS ! Is a great incentive to make something. 73 de vu3inj

  • @YamazakiKaoru
    @YamazakiKaoru 2 года назад

    Hi! I want to build this receiver and would like to know if using germanium diodes instead of 1N4148 can increase performance.
    Thanks!

    • @vk3ye
      @vk3ye  2 года назад +1

      Not in this circuit. Stay with silicon.

    • @YamazakiKaoru
      @YamazakiKaoru 2 года назад

      @@vk3ye Thanks.

  • @theradiodragon2awo
    @theradiodragon2awo 4 года назад

    i made reciever very similar to PIXIE but i used super vxo so i could tune it in mater of tens of kilohertz both ways and with frequency of 3.6MHz it was amazing bandwidth was really wide when i inspected it with PC soundcard 48KHz

  • @BabylonLurker
    @BabylonLurker 4 года назад +1

    If you want some selectivity, using a few more 3.579545 crystals in a ladder filter should do nicely. This idea is, of course lifted from the"Warbler" PSK transceiver (by K1SWL, I think).
    Vy 73 de Jan, OZ9QV.

    • @BabylonLurker
      @BabylonLurker 4 года назад

      That would do nicely, if you want to use it as a TX, too.

    • @vk3ye
      @vk3ye  4 года назад

      A good idea. Depends on where the centre frequency is. If it's unsuitable you might be able to do something with ceramic resonators.

    • @BabylonLurker
      @BabylonLurker 4 года назад

      @@vk3ye True enough.

    • @BabylonLurker
      @BabylonLurker 4 года назад +1

      @@vk3ye I might try the idea for FT8 propagation monitoring, so simple DCRX (DSB)

  • @acestudioscouk-Ace-G0ACE
    @acestudioscouk-Ace-G0ACE 3 года назад

    Nice and interesting video ... but you seriously need a tripod of fixed camera support. All that jerky movement made me feel quite sick!

  • @INFO_SELABX
    @INFO_SELABX Год назад

    I want to use small toroid tr37.. Can i

  • @researchandbuild1751
    @researchandbuild1751 4 года назад

    Neat project

  • @IvanPassos
    @IvanPassos 4 года назад

    Excellent

  • @therianet
    @therianet 4 года назад

    Interesting variety of diode ring mixer, most circuits I find for diode mixer use multiple tapped transformers but this one is simplified, do you know the name of this type ? Does it perform as well ?

    • @vk3ye
      @vk3ye  4 года назад

      Henry - I do not know the name of the mixer or whether it performs as well. It may only be single balanced rather than double balanced.

  • @phitrow
    @phitrow Год назад

    I think need HF amplifier.

  • @ДавидРозенбаум-я6л

    Очень интересная схема приёмника.

  • @СтаМилАлас
    @СтаМилАлас 4 года назад

    Bravo majstore vi 73 Y u 1 qg

  • @wamgoc3637
    @wamgoc3637 4 года назад

    Superhet is superior.

  • @ДобрякДобрович
    @ДобрякДобрович Год назад

    Quartz ntsc