The PTC-IIIusb is capable of maintaining reliable data links in adverse conditions with radio signals that are inaudible over distances of 6,000 miles (9,656 km) or more. The PTC-IIIusb has the same performance and most of the features of the PTC-IIpro provides direct modem to radio control and multiple ports. The PTC-IIIusb is fully compatible with the PACTOR III mode for data rates as high as 5200 baud.


Powered by two high performance processors from Motorola and built-in Digital Signal Processor (DSP). The PTC-IIIusb is the latest technology for high speed HF radio digital data transfers. Packet radio operation for VHF and UHF radio are capable of 19.2K baud rates is built-in with no additional hardware required.


This unit is compatible with radios from manufacturers such as ICOM, Yaesu, Furuno, Kenwood, SGC, etc. that have a transceiver switching time of 20 ms and adequate cooling for sustained high power operation. The PTC-IIIusb is compatible with commercial service networks such as SailMail ( as well as the international network of free Winlink ( amateur (ham) radio operators (MBOs) that support PACTOR modes. Compatible with Microsoft operating systems XP, Vista, & Windows®7 32/64-bit.


SKU: 1071

    Commencing January 2020, Royal Communications International, Inc. is pleased to announce that in addition to the  MICOM HF-SSB products, we will now be offering high quality BARRETT Communications products and systems. 

    The Barrett radios include several advanced capabilities and enhanced features to meet your communication needs.

    The Micom 4 development has been delayed until further notice.  

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    During the summer June-July 2017, pilot Brian Lloyd commenced his round-the-world flight to commemorate Amelia Earhart’s route eighty years ago in 1937. The two month flight followed Earhart’s historic equatorial route. Royal Communications International, Inc. was honored to support Brian throughout his expedition.


    “I chose the Micom3T transceiver for my historic recreation of Amelia Earhart's flight due to its robust construction and outstanding reputation for reliability in a harsh environment. While the control head is mounted in the cabin and lives in a more benign environment, the receiver/transmitter unit resides in an unheated and unpressurized avionics bay where the temperature may vary from +45C to -20C and the altitude may top 24,000 feet. In spite of this harsh environment the Micom3T performed well. 


    But even the best equipment can fail and I did experience an intermittent failure of the receiver/transmitter unit. A single call to Royal Communications had a replacement unit on its way to me on the other side of the world in a day. Clearly the emphasis was to get my communications back up and running reliably as quickly as possible. I am extremely pleased with the level of support I received. The replacement unit operated and continues to operate reliably.


    I recommend Royal Communications and Micom products without any reservation. They provide excellent service, great support, and reliable products. Thanks Royal!” - Brian Lloyd

    3135 Coachman Court, Oceanside, CA 92056

    Tel:  760_529_9518

    Fax: 760_529_9568