Posted by Damir [ 213.202.109.111 ] on June 18, 2006 at 18:42:34:

In Reply to: C3g driver update posted by Damir on June 03, 2006 at 12:41:20:

...that I tried a resistive load, too. With B1+ of 400-410V and Ra=22k (25W Dale wirewound), C3g tube "draws" about 10,1mA (with Rk=280 Ohms, bypassed), and A=44,4 times.
That means rp=3,27 kOhms for the tube with µ=51 in this OP, and Rout = Ra//rp = 2,85kOhms.
With 2x red LED bias, Ia was about 9,8mA and A=43,4 times.
Similar sound then CCS version, a little "warmer" - can be usable, for sure, but I prefered CCS...
Currently working on the final (in chasis) version...

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