Here is the “Project X” proto:
It’s kinda big with thru-hole components, but the current plan is to use SMT in production. Does that sound like a good idea, or does the mere mention of surface mount turn you off?
Due to “popular demand”, I’ve decided to release a bit of information on this rig. This isn’t a guarantee of final specifications, but the end product should be pretty close to this.
The rig above is a 40 meter CW superhet. Cascode JFET circuitry is used extensively throughout the radio. I’m aiming for this to be a trail-friendly radio. I don’t have any hard specs yet, but here are some general observations:
- RX current draw is now around 30 mA, but I’d like to squeeze it down further if I can
- TX is Class E, so TX current draw should be pretty good as well
- Nominal TX output power is 2 W
- MDS should be around -130 dBm (500 Hz BW)
- VFO tuning range approximately 40-50 kHz
- VFO stability is very good (~2 MHz VFO frequency)
- ATmega88 microcontroller for built-in keyer, mute, frequency counter, battery status, etc.
- Other planned bands are 80 m, 30 m, and 20 m. Would like to tweak design for upper bands as well for a future date
Hopefully that will whet your appetite a bit. Let me know in the comments any features that you would find useful that would be appropriate for a radio of this class.