Here are some routines to drive a Yaesu FT736R CAT interface. Note that the radio has TTL levels, so you need to build a circuit to convert RS232 voltages to TTL voltages. https://cleverhigh.amebaownd.com/posts/18262270. You can do this with a MAX231 etc, or a couple of NPN transistors. The latter can be mounted inside your DB25 connector. Transmitter and Receiver Modifications for the FT-736 and Other Rigs for Microsat Operation. By Howard Sodja, W6SHP., the FT-736 CAT interface, automatic/manual power control relay switches, and Trakbox, provide fully automatic satellite station control of power, antenna pointing and doppler tuning. FT-736 VHF/UHF Full Duplex Base. The FT-736 can be powered from 13.5 VDC or its built-in light weight switch mode AC power supply. Easy interface to TNC via Data in/out jack. CAT port for PC control of automatic Doppler correction. Independent linear amplifier relay control lines (1 for each band). Topic: FT 736 R CAT interfacing (Read 9665 times) IZ2HDN. We've got a FT-736 at KE4ZXW, Virginia AIr and Space Center, that we have been using for satcom. We want to use it with Ham Radio Deluxe on a Windows 10 computer with a USB port. The concept for this Yaesu FT-736R interface was developed by Dave Dowler, KA6BFB in 2010. Yaesu Fex-736-1.2 Fex-736r Band Ft-736 Unit Yaesu Fex-736-1.2 1200 1200 Fex-736r Fex-736-1.2 Band Unit Ft-736 Yaesu. Amplifier Keying Switching Amplifier Keying Interface Vhfuhf Buffer Relay Ft-736r Yaesu For Ft-736r Switching Keying Yaesu Buffer Relay Amplifier For Interface Vhfuhf.

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HS-736USB

FT-736R to HRD USB Interface

The Yaesu FT-736R remains a popular satellite ground station transceiver. Download microsoft office 2007. However some modern computer software is not compatible with the CAT interface on the FT-736R. Ham Radio Deluxe, in particular, does not support the FT-736R. Ham Radio Deluxe does support the Yaesu FT-847 which has similar features. We can solve this incompatibility by programming a CAT interface to present a FT-847 to the PC and emulate the new commands not supported on the FT-736R.

Features not present on the FT-736R are ignored. Memory channels are not supported and the radio must be set to VFO, also satellite mode must be set to VFO, before enabling CAT control of the radio. 1240 MHz is mapped to 240 MHz because the FT-847 does not have 4 MHz digits.

Credits

Yaesu Ft 736r Manual

The concept for this interface was developed by Dave, KA6BFB in 2010. He developed a proof of concept in software using VB and Windows. It was however quite cumbersome and used 3 virtual serial ports to work with HRD. But an excellent proof of concept nonetheless. This software can be found here:http://home.comcast.net/~tinkyr/736/KA6BFB%20Windows%20Emulator.htm

Yaesu Ft 736 Repair

The hardware version was developed by Chuck, N6BIL. The source code is GPL licensed and the Eagle CAD files were published along with the code. The hardware CAD files, source code and binaries can be found here:http://home.comcast.net/~tinkyr/736/N6BIL%20Hardware%20Emulator.htm

Yaesu Ft 8900r

Ham Spot Inc based the HS-736USB on their great work and thanks them immensely for their hard work on solving a challenging problem! The goal of Ham Spot Inc is that if this interface is popular we will develop similar interfaces for other older rigs which are also not supported by HRD. Specifically in mind are the FT-757GXII, FT-890 and various Icom and Kenwood radios. There will likely be firmware updates to this hardware available on the http://hamspot.com/ website in the future. If you have a PIC programmer the chip has been socketed to allow you to flash new firmware or easily replace the device. If not, there will be made available an inexpensive preprogrammed chip that you can plugin to upgrade the firmware or convert the FT-736USB to another model Yaesu rig as they become supported.

Interface Cat Yaesu Ft-736