2N3843A semiconductor manufactured by Sylvania, listed as 2N3843A (circa 1979).

2N3843 semiconductor manufactured by Sylvania, listed as 2N3843 (circa 1979).

2N3840 semiconductor manufactured by Sylvania, listed as 2N3840 (circa 1979).

2N3839 semiconductor manufactured by Sylvania, listed as 2N3839 (circa 1979).

2N3832 semiconductor manufactured by Sylvania, listed as 2N3832 (circa 1979).

2N3831 semiconductor manufactured by Sylvania, listed as 2N3831 (circa 1979).

2N3830 semiconductor manufactured by Sylvania, listed as 2N3830 (circa 1979).

2N3829 semiconductor manufactured by Sylvania, listed as 2N3829 (circa 1979).

2N3828 semiconductor manufactured by Sylvania, listed as 2N3828 (circa 1979).

2N3827 semiconductor manufactured by Sylvania, listed as 2N3827 (circa 1979).

2N3826 semiconductor manufactured by Sylvania, listed as 2N3826 (circa 1979).

2N3825 semiconductor manufactured by Sylvania, listed as 2N3825 (circa 1979).

2N3822 semiconductor manufactured by Sylvania, listed as 2N3822 (circa 1979).

2N3821 semiconductor manufactured by Sylvania, listed as 2N3821 (circa 1979).

2N3819 semiconductor manufactured by Sylvania, listed as 2N3819 (circa 1979).

2N3799 semiconductor manufactured by Sylvania, listed as 2N3799 (circa 1979).

2N3798 semiconductor manufactured by Sylvania, listed as 2N3798 (circa 1979).

2N3797 semiconductor manufactured by Sylvania, listed as 2N3797 (circa 1979).

2N3794 semiconductor manufactured by Sylvania, listed as 2N3794 (circa 1979).

2N3793 semiconductor manufactured by Sylvania, listed as 2N3793 (circa 1979).