Found in American documentation from the 90's, this circuit oscillates up to 150 MHz. The transistor supports an equivalent and the diode is general-purpose.
This source was found in a 1982 American publication, but can be easily assembled using 2N2995 (PNP...
This receiver can operate with the transmitters shown in previous articles and even others...
We got this circuit in an old 1983 publication, but it can be fitted with equivalent transistors. For Q1...