• Some back of the envelope design

    Trevor R.H. Clarke02/26/2020 at 19:46 0 comments

    Here's my initial take on an overall design.

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  • Initial design requirements

    Trevor R.H. Clarke02/26/2020 at 14:41 0 comments

    Here's my initial specs although it might change:

    • SSB voice and data, probably CW.
    • Headphone/line out as well as a built-in speaker
    • Mic in (probably an electret only) and line in/PTT line for sound card use
    • Basic built-in CW "straight key" for basic morse and transmission for tuning
    • Support for an external keyer
    • Superhet, most likely single conversion but if image rejection is a problem I'll add another IF
    • QRP level output (5W) and the capability to feed an external amp with pre-PA power (such as this)
    • Basic controls on a simple LED/LCD display with tuner, power level, CW configuration, some memories, etc.)
    • AGC and S-Meter
    • Ideally a tunable IF filter, or at least a couple of different options