Mullard 1960 Semiconductor Reference

How did Mullard make semiconductors? Read the book and find out.

Mullard Semiconductor Reference 1960

download crossreference for Russian Diodes used in double balanced mixer test.

Construction data for Russian components

D9B Germanium point contact

D311A is Germanium Mesa. It should have been as D312 with the M to show mesa construction.
You can download the book this data came from here:
 Russian Parts Cross Reference