maximising gain on K117 JFETS

Values found by experiment. (Rs bypassed with 47uF)


Vb=1.2V
Rs=3.4K Rd=3.32K  or
Rs=5K    Rd=5.4K    or
1.78K      1.7K      lower than above


Vb=2.6V
4.25K   11.7K    or
3.36? 3.78?     1oK


Vb=6V
1.24K 1.37K?    10K
4.5K     33K    very high +4dB than max at Vb=2.6V