Replacement for components from Air Band Receiver Kit

Discussion in 'Homebrew and Kit Projects' started by UB3ARM, Jan 19, 2019.

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  1. UB3ARM

    UB3ARM Ham Member QRZ Page

    Hi Dear Team!
    I have a KIT: Airband Receiver (

    in this kit uses transistors 2SC3355, mixer on SA612 (NE612) and IF amplifier on MC1350P
    i think that SA612 (NE612) is still ok, but I have some doubt about 2SC3355 and MC1350P, may be on right now has components with more high characteristics and which I can to use for replacement 2SC3355 and MC1350P
    thank you for advices and any ideas!
  2. VK3YE

    VK3YE Ham Member QRZ Page

  3. K6BSU

    K6BSU Ham Member QRZ Page

    I built one of those. Only modification was to the pot for the varicap tuning. External pot made to fit the National dial mechanism, and a trimmer pot for "fine tuning". The RF amp transistor is not critical, and almost any good RF NPN will work. The MC1350 as provided worked fine. A resonant 1/4 wave GP outside antenna is very useful.

    There's a lot of stuff for only $12+.
    UB3ARM likes this.
  4. KD8DEY

    KD8DEY Ham Member QRZ Page

  5. UB3ARM

    UB3ARM Ham Member QRZ Page

    Thank you guys!

    2 K6BSU, I changed default hyterodyne to generator (based on Si5351 by qrplabs) under Arduino control - it’s great for me,

    So, ok, you said to me what is transistors is ok, and not critical for this schema, ok, I will keep them without any changed
  6. K6BSU

    K6BSU Ham Member QRZ Page

    The NE612 provides a transistor to fashion an oscillator with a few external LC components. If the external components are temperature-stable, then the resulting oscillator is quite good and stable. Even at VHF, the oscillator stability can be excellent using this chip. I have used this chip in several home-brew projects.

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