local oscillator with FET J310 for 11-14 MHz and 23-27 MHz

Adaptation to the circuit: the circuit also works properly when you disconnect the backcoupling coil (L1) and connect the 1K5 source resistor directy to ground (so not via the backcoupling coil). Local oscillator for two frequency bands: 11-14 MHz and 23-27 MHz. Made with the J310 FET, a very good transistor to make an oscillator for frequencies above 10 Mhz up to 30 MHz (I mean: with almost any modern Silicon transistor you can make a VFO up to 9 MHz). I did not do a stabilty test, this only makes sense when the circuit is built neat and properly with short wires inside a shielded box with a stabilized power supply. I encourage everyone to make it this way and test it, I am interested in the results.
For people that have bought my books ("Retro Radio", issued by Elektor international Media in the Netherlands, author Ko Tilman) or "2-10 MHz Shortwave receiver and 1 transistor VFO's" (available on the Lulu website) the following information. I think it is possible to make a SW radio for frequencies between 23 and 27 MHz (AM signals) by using this local oscillator (of course not tested, especially on the VFO stabilty, this is the first demo model...). Use the showed oscillator coil also as antenna coil for 23-27 MHz, eventually make taps to gain selectivity and couple a short antenna via a 2-10 P cap. Use a 7-150 P (or less) antenna coil tuning capacitor (coarse) and bridge it with a 2-10 P fine tuning capacitor. The published circuits in my book are - in my opinion - usable. Mount everyting very sturdy, make the wiring as short as possible, but a too short wiring is not necessary up to 40 MHz (it must be repairable).