What amplifier are you using? The ARB704 is not needed with any modern amplifier than I am aware of.
The Amp is an Ameritron AL-80B.
FT-450D, AL-80B (with a 17-yo Eimac
) and AT2K tuner here. No buffer, no issues, no unnecessary interconnections.
- Amp tuned the way taught by W8JI and WB2WIK, settings for amp & tuner on a cheat sheet on the desk. (Thank you gentlemen for the grain from alot of old thread-chaff.)
- Have the 450D Pnl/C.S. front-panel push-button programmed for SWR function which allows a quick 10w carrier to check whatever the AT2K's been set to w/amp in standby; takes less than a second.
- AT2K switched to a direct output to which is connected a 1.5K dummy load. Amp on, verify output to dummy load so as not to bother the folks on a band.
- Flip AT2K back to antenna selector; play radio. Takes longer to type than do.
You have a great combo, it will serve you well.