FTDX-9000 - 4Khz Total Transmit Bandwidth Frequency
Enable TTBF mode - All models

There is a secret "Power On" function built into the FTDX-9000 that allows the rig to transmit from 50Hz to 4Khz. It is called TTBF which stands for Total Transmit Bandwidth Frequency. Once enabled, it will extend your transmit bandwidth right out to 4KC. You may need to re-EQ your mic to tailor it to this new bandwidth.

To enable TTBF, push and hold the two little buttons that are labeled AFL & ACM and turn the rig ON. These two little buttons are located right below and to either side of the SHIFT/WIDTH control. Once done successfully, when you check menu 078 for the TX Bandwidth, you should see TTBF instead of 3000WB. If you still see 3000WB, that means your little power ON "mod" is not done right. Ya gotta do it again.
I program my CS button to take me directly to this menu so if I need to change the TX bandwidth on a fly, I just hit the CS button and it'll prompt me right to it and change the BW quickly. This is one of the neatest feature of this rig since sliced bread :)
As a side note regarding the receiver bandwidth, the WIDTH control on the rig is for the receiver's bandwith adjustment. For hi-fidelity audio reception, I turn this knob fully clockwise. This is the one and only knob on the rig that is turned "All The Way To The Right" :)
You'll see that the display will show BW 4Khz and the receiver bandwidth opens up nicely.
You can undo this mod by simply repeat the same procedure or do a master reset. But why would you want to do that?

Now that you've gotten all this mastered, lets go do dat VooDoo dat ya do sooo welll!

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