N50, S2, and S3 configurations
The N-50 is a compact, rugged, economical unit used in wide variety of low-voltage applications, and is our most popular configuration. Although slightly larger than the NS-51, the N-50’s almost cubical shape makes more efficient use of space and delivers a remarkable amount of capacitance for its volume.
The S-2 and S-3 were once produced in large numbers for early AM/FM radios. They are currently used in a variety of other applications, most of them involved in ham radio gear and test equipment.