Custom Products from Masters Communications

Looking for radio adapters for digital applications? See our DRA-Series.

Masters Communications USB Radio Adapters - Standard Features:
These standard features are included in all RA Series Radio Adapters.

• AllStar Link compatible.
• DB-9F (DE-9F) radio connection (RJ45 on RA-38(M) - Mini-DIN-6 on RA-47M)
• USB "B" computer connection.
• New 3ft USB "A" to USB "B" 2.0 cable included.
• M Series RA's are supplied in a extruded anodized aluminum case - choose from three colors.
• A 3D plastic case is available as an option - select from several colors.
• A genuine crystal-stabilized C-Media CM119A.
• High quality components and printed circuit board.
• Audio coupling capacitors are highest quality (made for audio) from Nichicon, Rubycon, and Panasonic.
• Configurable VSEL and PSEL signals (to accommodate other CM chipsets).
• Easy to set potentiometer for manual receiver audio calibration.
• High quality machined sockets for all conventional DIP ICs.
• Several status LEDs that can be remotely mounted.
• Access to all GPIO from circuit board 'lands' marked G1 through G8.
• HeartBeat monitor to prevent stuck PTT should something fail.
• Operation from 5V (via USB cable).
• All kits come with surface-mount ICs pre-installed.
• All kits come with all of the required through-hole components included.
• All RA products are available Assembled & Tested for an additional fee.
• 90 day Limited Warranty. Repair available for units out of or not covered under warranty (my determination).

Masters Communications USB Radio Adapters - Individual Features:
Click on a model number in the header line for more information.

Feature
EEPROM Option	N	Y	Y	N	Y	Y	Y	Y
EEPROM Supplied	N	N	Y	N	Y	Y	Y	Y
FL-10 LPF Support	N	Y	Y	N	Y	Y	N	Y
Capability of Driving a Speaker Directly	N	N	Y	N	Y	Y	Y	Y
10 to 16V Amplifier and/or Filter Operation	N	Y	Y	N	Y	Y	N	Y
Transmit Level Pots	N	Y	Y	Y	Y	Y	Y	Y
Receive Level Pot	Y	Y	Y	Y	Y	Y	Y	Y
CTCSS Encode Control Support	N	Y	N	N	N	Y	N	N
COS Status LED (receiver activity)	N	N	N	Y	N	Y	Y	N
In-Cabinet Control Revert Support	N	Y	Y	N	Y	Y	N	Y
Number of Status LEDs	3	3	3	4	3	4	4	3
MABEL Support	N	N	Y	N	Y	Y	N	Y

Other Options:

• The FL-10 low-pass filter can be added optionally to the RA-33, RA-35, RA-40, RA-42, and RA-DR1X to allow connection directly to a FM modulator.
• Metal-SC Case  Extruded anodized aluminum case for "M" Series RA's.
  All Metal - Secure Construction - Totally Shielded. Now available in Red, Blue and Black.
  
• Plastic RA/DRA-Case  A nice plastic case for the RA or DRA Series radio adapters. Available in several colors.

More Information:
Click here for detailed radio adapter descriptions and explanations.

Email Kevin Custer for ordering information, ordering by check, and/or support of these exciting products.

Product of Masters Communications, all rights reserved.
Specifications may change without notice.
Images are property of Kevin Custer - W3KKC.
Board layout by Kevin Custer - W3KKC.
HTML May 21, 2019, WA1MIK All Rights Reserved!