The 20mm diode module adapter is used to retain a "DTR" 20mm all-copper diode module within our S4 and C6 hosts.
DTR 20mm copper diode modules can be purchased here:DTR Copper Diode Modules
The inside lip of the adapter makes direct contact with the module and holds it in compression against the driver pill. By using a small amount of thermal grease, effective heat transfer can be established from the module to the adapter and the pill, and through the rest of the host.
Clearly a good number of different diode-driver combinations can be used in this configuration. We leave it to the imagination of the builder to decide what is the best combination of parts for their application.
An included O-ring can be placed between the end of the module and the inside lip of the module adapter to compensate for slight tolerances in the length of the module if necessary.
An extended focus ring is recommended for use with this arrangement because the diode module will be recessed slightly inside the module adapter.Note that this part is intended for use with the DTR 20mm all-copper module with the built-in driver shelf. Due to differences in length it may not work with the other versions of the module
(although DTR has informed us that the other versions will be made the same length sometime in the future).