Electrical solderless or soldered connectors
The electrical conductivity of solder is relatively poor. It's not even close to copper.
A low resistance solder joint is accomplished the same way a low resistance crimp joint is achieved. The copper of both parts is joined to maximize the surface to surface contact. The solder itself should not be relied upon for the electrical connection where resistance is a concern. It's there to ensure the joint stays together and protects from oxidation.
IACS is conductivity relative to copper.
Don't get me wrong. I like soldering. I soldered new caps into the radio. But with open barrel connectors, crimping the conductor and insulator with the right crimper is quite reliable. A sleeve to protect against oxidation takes it one step further. Many of the open barrel terminals are still available with a tin plate which also reduces oxidation (at the expense of a very thin layer of higher resistance). The most exposed OEM terminals used a silver plate which is much more difficult to find new.
Not fully true.
The electrical conductivity of solder is relatively poor. It's not even close to copper.
A low resistance solder joint is accomplished the same way a low resistance crimp joint is achieved. The copper of both parts is joined to maximize the surface to surface contact. The solder itself should not be relied upon for the electrical connection where resistance is a concern. It's there to ensure the joint stays together and protects from oxidation.
IACS is conductivity relative to copper.
Don't get me wrong. I like soldering. I soldered new caps into the radio. But with open barrel connectors, crimping the conductor and insulator with the right crimper is quite reliable. A sleeve to protect against oxidation takes it one step further. Many of the open barrel terminals are still available with a tin plate which also reduces oxidation (at the expense of a very thin layer of higher resistance). The most exposed OEM terminals used a silver plate which is much more difficult to find new.