The 2N3566 is a silicon NPN transistor in a TO-105 case. The 2N3566 is primarily intended for general purpose amplifier applications. The 2N3566 was used in the Astrotone fuzz and Sam Ash Fuzzz Boxx.
The 2N3704 is a general purpose silicon NPN transistor in a TO-92 case. The 2N3704 is primarily intended for general purpose amplification and switching applications.
N-Channel RF Amplifier TO-92. This device has been designed for use as RF amplifier or in mixer applications that are operating at up to 450MHz, It is also suitable for analog switching requiring low capacitance.
2N4061 PNP transistors. This is a silicon PNP transistor in a TO-92 package. The 2N4061 has been used in a variety of effects pedals and is most notably used in the Zonk Machine II.
The 2N708 is a silicon NPN transistor in a TO-18 metal case type. The 2N708 is primarily intended for use in high speed switching and VHF amplification applications.