Total posts : 45366
Hate to rain on your parade, but:
1. Both of these rigs are WAY overpowered for 22 meter (13,560 kHz) operation. Of course, that can be dialed down, but I wonder how much. See the Part 15 Digest for power/antenna combination that should produce the max allowed field strength.
2. Regarding the one from port-5.com, it seems to be for 6-8 MHz, not 13.56 MHz, and you might get 300km range from this rig, but I don’t know about getting it from anything legal on 22 meters.
3. Regarding the unit from electronicsforu.com, note the statements in the text about it being tuned by an L-C circuit, the stability depending on the power supply, and the harmonics in the output. This waves a big red flag to me when I think Part 15.
4. A transmitter for a legal 13,560 setup probably wouldn’t have to put out anything over 100mW (which should definitely make up for any short antenna and/or feedline loss), and you would want crystal control (probably using a 27.120 MHz crystal in a frequency divider so you also halve the crystal’s drift), a very well-regulated power supply, and a design that suppresses harmonics and other spurious emissions. Remember that your frequency has to stay within +/- 0.01% from -20 to +50 degrees C at normal supply voltage and from 85% to 115% of normal voltage at +20 degrees C.
5. Believe me, these guys may be shortwave, but they aren’t Part 15.