(Custom)
| General: | Entry for user designed/installed custom modifications, experimental or one-off items |
| Status: |
| Start Date: | (unknown) | End Date: | (unknown) |
| Web Site: |
| Model | Part # | Name | Type | Description |
| H-89-USB-FTDI-1 | USB Adapter | board | custom USB adapter, Elmquist/Emrick | |
| H-89-USB-FTDI-2 | USB Adapter | board | custom USB adapter, vers. 2, Elmquist/Emrick |