Kenwood TS-440: 2 MOD che lo trasformano! CAT da PC + Power SSB

In this video, we look at two very interesting modifications for the Kenwood TS-440, one of the vintage HF transceivers still widely used among amateur radio operators. I'll also explain how I fixed a problem with the internal tuner, which wasn't working on 40 and 80 meters. 🔧 Modification 1: Power control also in SSB, CW, and FSK By cutting the D49 diode on the IF unit, it's possible to enable RF POWER control even in modes where it's not normally available. 🔧 Modification 2: Installation of the IC-10 kit for CAT control With the addition of the 8251A and TC4040BP ICs, the TS-440 can be controlled from a PC via a serial interface (4800 baud) using the ACC-1 port. 🔧 Automatic tuner failure: 💻 Connecting to a PC via an FTDI USB-to-serial interface ⚠️ Note: It's necessary to invert the logic levels of RXD and TXD (reprogramming with ftdi_eeprom) 🧪 Tests performed with TS-440 Remote Controller software It's truly amazing to see an 1980s RTX communicating seamlessly with a modern computer! 00:00 Start 00:09 Introduction 01:59 Theme Song 02:11 Description of the modifications we'll be making 04:24 1st MOD: Adjusting the SSB transmission power 06:55 2nd MOD: Activating CAT serial communication 12:15 Repairing the tuner fault 15:57 Reclosing the RTX 17:33 Let's try the SSB transmission power adjustment 19:20 Making the PC-RTX serial connection cable on ACC1 21:10 Let's try the CAT control 22:31 Useful CAT control with the Log software 23:08 Final considerations and farewells 23:50 Ending Theme Song 📡 If you're interested in repairs, modifications, DIY construction, and amateur radio, subscribe to the channel. ✉️ [email protected] 🚫Disclaimer: This video is for entertainment purposes only. Any injury, damage, or loss that may result from the improper use of tools, equipment, or the information contained in this video is the sole responsibility of the viewer and should be used at the end-user/viewer's discretion.