Ldg z100 plus manual

I picked up a LDG Z100 plus for my 891. I am sort of confused what the purpose of the 3.5mm YACC According to the manual, on Page 12, the purpose of the YACC interface cable is to let the TUNER make the Yaesu radio transmit, but it only does this when pushing the TUNE button on the I was recently considering getting an LDG IT100 Autotuner for my Icom IC-7300. In looking at my options I came across the LDG Z-100 plus, which seems to be the same tuner, but I would need to get a separate The Z100 plus with an Icom interface cable is $153.00 at HRO. Which option is best? The LDG Z-100Plus requires very little electrical power. It draws about 200 mA when tuning and just about Zero current when receiving or in standby. This feature makes the Z-100Plus especially suitable for mobile or portable operations. All LDG tuners come with a two-year fully transferable warranty and