Using old components stored in a damp cold shed for decades?
Some of the components may have suffered simply from age.
And some of the components may not have been all that great when they were new.
Likely most of the components have oxidized lead wires which may require cleaning before you can solder to them properly.

Highly recommend one of those $15 "Digital Combo Component Tester Transistor Diode Inductor LCR Capacitor ESR Meter" that are available from many vendors on Ebay.  It will identify what kind of component, measure the value, give you secondary measurements (like capacitor ESR, etc.)  That will help you evaluate which components are still viable and which have expired.