It is unit of capacitance. 220 micro farad.
!I need to find this :Capacitors: 2 off 220uF 16v electrolytic.5 off .01uF polyester.5 off .1uF polyester.Resistors: All resistors 1/4 watt 5%6 off 10k1 off 1K1 off 2.2m ===== 2.2 Mega ohm2 off 39kTransistors: All BC 184B, or 2N3904, or 2N2222A. Just about any small signal npn with a gain of 250+ will do. There are hundreds to choose from.Can you find all the components in a radio , or anything else ?I don't wanne buy things ,so.Sorry for my bad English , I'm dutch !Thanks !