All five of these special connectors as needed for the LAB599 TX-500 Discovery QRP radio, sold as a set of 5.
eBay
This is for keying your DIY PA-500 amplifier from your LAB599 Discovery TX-500 radio. Cable from your LAB599 Discovery TX-500 radio (REM/DATA 7 pin connector) connect to your DIY PA-500 (CAT/CNTRL 6 pin connector) amplifier for KEYING the amplifier.
eBay
LAB 599 Discovery TX-500 – Military Style Portable Transceiver - Made in UAE. Unique form-factor - The Lab599 Discovery unique form-factor allow operate from anywhere. The transceiver is only 30 mm thick, including knobs, weighing only 0.55 kg.
eBay
For the LAB599 TX-500 radio, 5 pin to 3.5mm 3 conductor (TRS, stereo) female AND a 3.5mm male plug with 3 foot molded cable for your key, paddle or bug. For a paddle red is DASH (Tip), white is DOT (Ring), Shield is ground.
eBay