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begin ideas 70cm qrp cw trx

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HB9KNS 2018-06-21 08:46:05 +02:00
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# scratchpad: ideas, notes etc
## portable 70cm cw
low-power cw transceiver
- 432000..432400 kHz
- headphone jack, loudspeaker optional (low sound quality ok)
- direct keying, elbug circuit optional (mechanical switch)
- working on 5..12 V, optimized for 5 V (USB)
- output pwr: min 0.1 W, optional 0.5 and 2 W
- LCD display with mechanical backlight switch
- mechanical off/volume knob
- mechanical or electronic (eg 100 Hz steps) BFO
- power save mode 100/30/10/3% with variable squelch (trimmer?)