it seems you're versatile with that
see 2SK77B graph ... tnx to AnthonyA , shown here : Tokin 2SK77B datasheet | Zen Mod Blog
also attached ......
I know I'm Greedy and Naughty Boy ....... can you give me more ......... as much you're confident it's safe with your testing procedure
so , gate v. step 1V, starting from 0 , and V and A whatever you choose max
I have built an amplifier similar to the SIT-2 using Tokin 2SK182ES devices. With the particular FETs used I found it necessary to use Vds voltages greater than 50V in order to obtain a second harmonic sweet spot with a 6 Ohm load and 1.6A bias. The two SITs have rather different parameters, requiring different bias currents and idle Vds settings in order to get the THD vs. Watts curves shown below:
What was your power supply voltage total at the top of the current source?
80 watts dissipation for the SIT? How hot does the SIT become?
You always have interesting projects.