you should be able to get the feel for those trb's fairly quickly , surely helps to have a decent talkback inline for that , I don't use power mic's , but even with rk-56 , talkback is set up very lightly for the radio used.
Although I don't mess with it very often as it is , setting it for just a faint echo/reverb is not a chore. Maybe in the beginning if your new at it , my audio on my radio with rk-56 is usually set at 12 o-clock 24/7 ,(either cap /resistor mod or diode mod in AM/SSB radios) my talkback is just faint enough for me to hear it there , If I should want to make a bunch of noise with the trb-1 and then decide to go make to my normal setting , I will then turn my audio up to make my talkback louder in order to get back my normal setting. (because I don't use a power mic and I use a swing type mod on most , I can use about a 50 ohm resistor for my talkback without problem) that also has to do with using the rk-56 nc mic.
Usually my little knob is at 2 o-clock from the off setting and the bigger one is usually at about 7 or 8 o-clock. Could be different for you if the knob was put in the radio differently . I doubt I would ever put a toggle on it other then to just shut it off for SSB if needed.
