NB6GC / KO6NO Remote Adapter

Stop Pushing Buttons to Operate Your Harris Radio. Take advantage of the Remote Control features built into your radio. Use your computer to monitor and control

Harris Radio provided these control features from the beginning of the RT-1446/URC production in 1981. But due to a lack of Remote Control Adapter Modules, many owners have been unable to use Remote Control.

We have created a circuit board to match the RS232 mode of the Harris A1A19 Module for use in the radios of the USS Hornet Museum Amateur Radio Station.

We created a small production run of these modules, some of which will be made available for sale to owners of the RF350 or RT-1446. Money from sales will be used for restoration efforts on the USS Hornet and for improvements to the Hornet Amateur Radio Station.

The NB6GC / KO6NO Remote Adapter, shown above mounted on the front panel of an RT-1446, is capable of baud rates from 300 to 19,200 baud. Hardware Handshaking is built-in so that "Null Modems" are not required. The module is completely assembled and comes with the ribbon cable necessary to connect to the radio's Control Board. An Operator's Manual with a schematic diagram is included. Each adapter and cable are tested before shipping.

Software for remote control of the RT-1446 is not included but is available from Dale Chidester, AAR9WI/NJ7C and may be downloaded from the web site:

on the "Harris Manuals" page. His Windows program, Serial.Exe, provides control of all of the radio's features, a few of which can not be controlled from the front panel. You can edit and save a list of 300 channels which are available by clicking. Frequency scanning and jogging are provided and audio source may be set to match the type of operation.

There are at least two versions of the EPROM program for the radio's Control Board microprocessor. The version may be determined by examining the labels on the three EPROM chips after lowering the front panel. The EPROMs are 28 pin DIPs located in the upper right corner. During the testing of the NB6GC Adapter with NJ7C's software, Dale was able to optimize operation of his program with versions 601C and 604M of the EPROM so that remote control is possible with either version. However, version 601C does not provide adjustment and monitoring of the receiver RF Gain and also requires a more complicated method for setting the AGC and Mode.

Because only one of Hornet's RF350s had version 604M installed, we have set up a facility to create and install version 604M chips. For owners of RF350 or RT-1446/URC units, we can provide EPROMS programmed with Version 604M. Because the contents of the EPROMs are copyrighted material of Harris Radio, we are offering this as a service at a price equivalent to the cost of EPROM chips and shipping. All EPROMs are clearly marked with the original copyright label of Harris Radio.

Thanks to the many purchasers over the last two years, we have only one incomplete kit for the Remote Adapter Circuit Board left. If you are interested, please ask. For anyone interested in creating their own board, we have decided to place the schematic and artwork on line for download. The schematic and pcb files were created by using ExpressSCH and ExpressPCB which are available free from their website.

To order, fill in the form below. An invoice will be sent to your Email by PayPal where you may pay by credit card or PayPal. Shipping cost for U. S. orders is $7. International shipping costs will be calculated from U. S. Post Office rates. Indicate if First Class Air Mail (cheaper) is acceptable.