Required Hardware
| Item | Qty | Link | Price | Notes |
|---|---|---|---|---|
| DVM-V1 Duplex Modem | 1 | Link | $79.99 | This is the device that will allow the P25 traffic received to be re-transmitted to another P25 capable radio. |
| Hammond Manufacturing Enclsosure | 1 | Link | $30.92 | Model: 1455C801, optional but highly recommended to protect the PCB. |
| DVM-V1 End Plates | 1 | Link | $4.99 | Optional but highly recommended to complete the "look" and to support W3AXL. |
| Raspberry Pi or equivalent SBC/NUC | 1 | Link | $125.99 |
A Raspberry Pi 4+ is recommended. This will serve as the power source, and configuration host for the DVM-V1 Duplex Modem. |
| Motorola CDM Series Radio | 2 | Link | N/A | Price will vary, if you can, find someone local, in a Discord community, or a Facebook group related to Ham/LMR/etc. that might be selling a radio. |
| Motorola CDM Series Programming Cable | 1 | Serial:Link USB:Link |
$18.95 $32.95 |
Motorola P/N: RKN4081 |
| Motorola CDM Series Repeater Cables | 2 | Link | $12.49 | One cable will get connected to the TX radio, the other will be connected to the RX radio. |
| RJ45 To Terminal Block Adapter | 1 | Type 1: Link Type 2: Link |
$12.99 $16.99 |
This is a personal preference. My build utilizes the "Type 1" adapters at the moment. |
| UHF or VHF Duplexer | 1 | Link | $199.99 | This was the duplexer I chose, and I also paid an additional $59.99 to have it pre-tuned to my frequencies. |
Note: Antennas for the TX and RX radio will also be required, and that will need to be a personal choice based off your application and usage needs. The connector on the rear of the Motorola CDM series radios is a mini-UHF connector.